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Stable isotopes of water (δ2H, δ18O) and δ13CTIC were used as a tool to trace the recharge processes, natural carbon (organic and inorganic) source and dynamics in the aquifers of the central Gangetic basin, India. Stable isotope (δ2H, δ18O) record of groundwater (n = 105) revealed that the groundwater of Piedmont was recharged by meteoric origin before evaporation, while aquifers of the older and younger alluvium were recharged by water that had undergone evaporation loss. River Ganges and its tributaries passing through this area have very little contribution in recharging while ponds play no role in the recharging of adjacent aquifers. The connectivity of shallow aquifers of aquitard formation (comprised of clay/sandy clay with thin patches of fine grey sand), i.e. 25–60 m below ground level (bgl) with the main upper aquifer (at a depth of >120 m bgl) was found to be higher in older and younger alluvium. Negative values of δ13CTIC (median −9.6 ‰; range −13.2 to −5.4 ‰) and high TIC (median 35 mM; range 31–46 mM) coupled with low TOC (median 1.35 mg/L; range 0.99–1.77 mg/L) indicated acceleration in microbial activity in the younger alluvium, especially in the active floodplain of river Ganges and its proximity.
Manoj Kumar; Al. Ramanathan; Abhijit Mukherjee; Ravi Sawlani; Shyam Ranjan. Delineating sources of groundwater recharge and carbon in Holocene aquifers of the central Gangetic basin using stable isotopic signatures. Isotopes in Environmental and Health Studies 2019, 55, 254 -271.
AMA StyleManoj Kumar, Al. Ramanathan, Abhijit Mukherjee, Ravi Sawlani, Shyam Ranjan. Delineating sources of groundwater recharge and carbon in Holocene aquifers of the central Gangetic basin using stable isotopic signatures. Isotopes in Environmental and Health Studies. 2019; 55 (3):254-271.
Chicago/Turabian StyleManoj Kumar; Al. Ramanathan; Abhijit Mukherjee; Ravi Sawlani; Shyam Ranjan. 2019. "Delineating sources of groundwater recharge and carbon in Holocene aquifers of the central Gangetic basin using stable isotopic signatures." Isotopes in Environmental and Health Studies 55, no. 3: 254-271.
Groundwater samples via tubewells were collected from the district Saharanpur, Uttar Pradesh (India). The study aimed to analyse groundwater quality and potential sources of trace metal contamination using the multivariate statistical tool, and the level of contamination by applying contamination index (Cd) and heavy metal pollution index (HPI). The groundwater was found to be enriched with Fe and contaminated with the trace and toxic elements like Al, As, B, Cu, Mn and Pb having mean values of 2786, 152, 9, 1033, 107, 199 and 15 µL respectively. Arsenic exceeded the WHO (2011) guidelines and BIS (2012) standard (10 µg/L) for 30% of the groundwater samples. For B, 46% of the samples were found having concentration higher than BIS (2012) permissible limit (1000 µg/L) and 3% to WHO (2011) guideline values (2400 µL). Lead level exceeded the BIS (2012) standard value and WHO (2011) guideline value in 46% of the samples. Multivariate analysis identified three factors responsible for data composition explaining 81% of the total variance in groundwater samples. Factor analysis (PCA and CA) allowed grouping of parameters according to the common features; Fe, Mn and Pb were associated with PC1 and controlled by the mixed origin such as geogenic sources as well as anthropogenic activities. Boron and Cu (PC2) were controlled by anthropogenic activities while As (PC3) was derived from the geogenic sources. The northern part of study area has higher Pb and Mn concentration than the southern part associated with small industrial activities. Degree of contamination and heavy metal pollution index supported the results and higher contamination was found to be in the vicinity of industrial setups. The overall quality (estimated using HPI values) of groundwater in the northern area is poor, and may cause potential health risk from the analyzed tubewells to the local population if the water is consumed for longer time.
Manoj Kumar; Ritu Nagdev; Ritu Tripathi; Virendra Bahadur Singh; Prabhat Ranjan; Mohd Soheb; Al. Ramanathan. Geospatial and multivariate analysis of trace metals in tubewell water using for drinking purpose in the upper Gangetic basin, India: Heavy metal pollution index. Groundwater for Sustainable Development 2018, 8, 122 -133.
AMA StyleManoj Kumar, Ritu Nagdev, Ritu Tripathi, Virendra Bahadur Singh, Prabhat Ranjan, Mohd Soheb, Al. Ramanathan. Geospatial and multivariate analysis of trace metals in tubewell water using for drinking purpose in the upper Gangetic basin, India: Heavy metal pollution index. Groundwater for Sustainable Development. 2018; 8 ():122-133.
Chicago/Turabian StyleManoj Kumar; Ritu Nagdev; Ritu Tripathi; Virendra Bahadur Singh; Prabhat Ranjan; Mohd Soheb; Al. Ramanathan. 2018. "Geospatial and multivariate analysis of trace metals in tubewell water using for drinking purpose in the upper Gangetic basin, India: Heavy metal pollution index." Groundwater for Sustainable Development 8, no. : 122-133.
Geochemical influences on arsenic (As) and other solutes along with regional groundwater flow path were inferred in parts of the central Gangetic Basin. The median concentration of As in groundwater was higher (0.046 mg/L) in Piedmont and (0.006 mg/L) in younger alluvium while very low (0.002 mg/L) in older alluvium. The median As concentrations in core sediments of Piedmont, older alluvium and younger alluvium were observed as 5.12, 11.2 and 11.6 mg/kg, respectively. Approximately 70% of the samples fell in As(OH)3 or As(III) field and 30% samples fell in HAsO42− or field of As(V) in Eh-pH plots. In contrast ∼60% of the samples fell in the FeOOH field and 40% in Fe(II) field in the Eh-pH plots. Cation exchange in Piedmont and older alluvium, while carbonate dissolution in younger alluvium controlling the groundwater major solute chemistry. The predictive outputs of inverse modeling congruence with predicted/ hypothetical groundwater flow directions. It was observed that geomorphology and the groundwater flow path also have substantial influence on solute chemistry and As distribution. Redox controlled adsorption/ desorption of Fe-Mn (oxyhydr)oxide was suggested as the probable mechanisms for As liberation in Piedmont, while multiple processes control the mobilization and presence of As in the younger alluvium. Study also concluded that the shallow aquifers of Piedmont and younger alluvium are contaminated with As while aquifers of older alluvium having low As contamination, could be the safe alternate for the residing people.
Manoj Kumar; A.L. Ramanathan; Abhijit Mukherjee; Swati Verma; Mohammad Mahmudur Rahman; Ravi Naidu. Hydrogeo-morphological influences for arsenic release and fate in the central Gangetic Basin, India. Environmental Technology & Innovation 2018, 12, 243 -260.
AMA StyleManoj Kumar, A.L. Ramanathan, Abhijit Mukherjee, Swati Verma, Mohammad Mahmudur Rahman, Ravi Naidu. Hydrogeo-morphological influences for arsenic release and fate in the central Gangetic Basin, India. Environmental Technology & Innovation. 2018; 12 ():243-260.
Chicago/Turabian StyleManoj Kumar; A.L. Ramanathan; Abhijit Mukherjee; Swati Verma; Mohammad Mahmudur Rahman; Ravi Naidu. 2018. "Hydrogeo-morphological influences for arsenic release and fate in the central Gangetic Basin, India." Environmental Technology & Innovation 12, no. : 243-260.
Praveen K. Singh; Alok Kumar; Kakolee Banerjee. Methane Emission and Its Variability in Different Land-uses of Semi-arid Region, Rajasthan. Journal of Climate Change 2018, 4, 67 -75.
AMA StylePraveen K. Singh, Alok Kumar, Kakolee Banerjee. Methane Emission and Its Variability in Different Land-uses of Semi-arid Region, Rajasthan. Journal of Climate Change. 2018; 4 (2):67-75.
Chicago/Turabian StylePraveen K. Singh; Alok Kumar; Kakolee Banerjee. 2018. "Methane Emission and Its Variability in Different Land-uses of Semi-arid Region, Rajasthan." Journal of Climate Change 4, no. 2: 67-75.
The current study was focused on the characterization of recharge, weathering processes and to check the aptness of groundwater for household and agriculture utility in the Chhaprola industrial area located in Gautam Buddha Nagar district of Uttar Pradesh, India. Groundwater samples (n = 33) were analyzed for major cations and anions from which (n = 22) were analyzed for stable isotopic records (δ2H and δ18O). Solute chemistry revealed neutral to moderately basic nature (pH ranged 6.4–8.8) and showed a higher (ranged 552–3130 µS/cm) of electrical conductivity. Isotopic signals ranged from − 8.7 to − 3.3‰ for δ18O and − 60.1 to − 37‰ for δ2H. Bivariate plot of stable isotopes (δ18O and δ2H) showed that majority of the samples fell below the global meteoric water line (GMWL) and local meteoric water line (LMWL) of New Delhi, indicating enrichment of heavier isotopes in the aquifers, which explain that recharging water, has undergone evaporation before recharging the aquifer. Monsoonal precipitation was observed as the major source of aquifer recharge in the surveyed area. Vertical hydraulic connectivity of the aquifer layers was traced with the help of isotopic record which exhibited a more negative intercept for shallow depth tube well than the middle depth tube well. About 76% of the samples exhibited negative Schoeller index thereby indicated cation-anion exchange reactions while the remaining samples depicted the Base Exchange Reactions. Sodium-normalized Ca versus Na-normalized Mg and HCO3, indicated an equal contribution of silicate and carbonate type weathering on global-average weathering system. About 52% of the groundwater samples fell into the Ca-HCO3- water type while remaining samples fell into 33% and 15% of Na-HCO3 and Mg-HCO3 type, respectively. Water quality indices (viz. residual sodium carbonate, Kelly index, permeability index, magnesium hazard, and Chloroalkaline indices) revealed unsuitability of the groundwater for drinking and irrigation purpose at few locations.
Manoj Kumar; Al. Ramanathan; Shyam Ranjan; Virendra Bahadur Singh; Naveen Kumar; Shailesh Kumar Yadav; M. Someshwar Rao; Susie Ritch; Prosun Bhattacharya. Groundwater evolution and its utility in upper Ganges-Yamuna Alluvial plain of Northern India, India: Evidence from solute chemistry and stable isotopes. Groundwater for Sustainable Development 2018, 7, 400 -409.
AMA StyleManoj Kumar, Al. Ramanathan, Shyam Ranjan, Virendra Bahadur Singh, Naveen Kumar, Shailesh Kumar Yadav, M. Someshwar Rao, Susie Ritch, Prosun Bhattacharya. Groundwater evolution and its utility in upper Ganges-Yamuna Alluvial plain of Northern India, India: Evidence from solute chemistry and stable isotopes. Groundwater for Sustainable Development. 2018; 7 ():400-409.
Chicago/Turabian StyleManoj Kumar; Al. Ramanathan; Shyam Ranjan; Virendra Bahadur Singh; Naveen Kumar; Shailesh Kumar Yadav; M. Someshwar Rao; Susie Ritch; Prosun Bhattacharya. 2018. "Groundwater evolution and its utility in upper Ganges-Yamuna Alluvial plain of Northern India, India: Evidence from solute chemistry and stable isotopes." Groundwater for Sustainable Development 7, no. : 400-409.
Hooghly–Matla estuarine system along with the Sundarbans mangroves forms one of the most diverse and vulnerable ecosystems in the world. We have investigated the distribution of Co, Cr, Cu, Fe and Zn along with sediment properties at six locations [Shamshernagar (S1), Kumirmari (S2 and S3), Petuaghat (S4), Tapoban (S5) and Chemaguri (S6)] in the Hooghly estuary and reclaimed islands of the Sundarbans for assessing the degree of contamination and potential ecological risks. Enrichment factor values (0.9–21.6) show enrichment of Co, Cu and Zn in the intertidal sediments considering all sampling locations and depth profiles. Geo-accumulation index values irrespective of sampling locations and depth revealed that Co and Cu are under class II and class III level indicating a moderate contamination of sediments. The pollution load index was higher than unity (1.6–2.1), and Co and Cu were the major contributors to the sediment pollution followed by Zn, Cr and Fe with the minimum values at S1 and the maximum values at S5. The sediments of the Hooghly–Matla estuarine region (S4, S5 and S6) showed considerable ecological risks, when compared with effect range low/effect range median and threshold effect level/probable effect level values. The variation in the distribution of the studied elements may be due to variation in discharge pattern and exposure to industrial effluent and domestic sewage, storm water and agricultural run-off and fluvial dynamics of the region. The study illuminates the necessity for the proper management of vulnerable coastal estuarine ecosystem by stringent pollution control measures along with regular monitoring and checking program.
Somdeep Ghosh; Madhurima Bakshi; Alok Kumar; A. L. Ramanathan; Jayanta Kumar Biswas; Subarna Bhattacharyya; Punarbasu Chaudhuri; Sabry M. Shaheen; Jörg Rinklebe. Assessing the potential ecological risk of Co, Cr, Cu, Fe and Zn in the sediments of Hooghly–Matla estuarine system, India. Environmental Geochemistry and Health 2018, 41, 53 -70.
AMA StyleSomdeep Ghosh, Madhurima Bakshi, Alok Kumar, A. L. Ramanathan, Jayanta Kumar Biswas, Subarna Bhattacharyya, Punarbasu Chaudhuri, Sabry M. Shaheen, Jörg Rinklebe. Assessing the potential ecological risk of Co, Cr, Cu, Fe and Zn in the sediments of Hooghly–Matla estuarine system, India. Environmental Geochemistry and Health. 2018; 41 (1):53-70.
Chicago/Turabian StyleSomdeep Ghosh; Madhurima Bakshi; Alok Kumar; A. L. Ramanathan; Jayanta Kumar Biswas; Subarna Bhattacharyya; Punarbasu Chaudhuri; Sabry M. Shaheen; Jörg Rinklebe. 2018. "Assessing the potential ecological risk of Co, Cr, Cu, Fe and Zn in the sediments of Hooghly–Matla estuarine system, India." Environmental Geochemistry and Health 41, no. 1: 53-70.
Comparative study of trace metals distribution in the surface sediment of Sundarban mangrove ecosystem in India and Bangladesh is one of the primary baseline study done so far. Trace metal distribution assessment covering lower salinity zone to higher salinity zone was done along Matla River (tidal river) in Indian side and freshwater zone to higher salinity zone along Passur River in Bangladesh side of Sundarban; representing anthropogenic influenced area, agricultural area, tourist site and pristine area. Trace metals distribution in the surface sediments of Sundarban mangrove ecosystem shows relatively higher value of trace metals, Co, Cr, Cu, Fe, Ni, Pb and Zn in Indian part when compared to Bangladesh. Enrichment factor shows the highest enrichment of Pb in both parts of Sundarban mangroves. Co, Cr, Cu, Pb and Zn show EF > 1 indicates sediment contamination from anthropogenic activities. Cr, Ni and Pb were found to have moderate accumulation in geoaccumulation index with Fe showing high accumulation. Normalized data of trace metals shows 87.5% from Indian site and 80% of Bangladesh site as outlier, indicating anthropogenic influence. Out of total sampling site 50% of Indian and 40% of Bangladesh site show trace metal values enriched more than predicted value of trace metals indicating Indian part have more polluted sites than Bangladesh side of Sundarban, which is also confirmed by enrichment factor, I-geo and normalization values in both the sides.
Prabhat Ranjan; A.L. Ramanathan; Alok Kumar; Ramanathan AL; Dilip Datta; M. Venkatesh. Trace metal distribution, assessment and enrichment in the surface sediments of Sundarban mangrove ecosystem in India and Bangladesh. Marine Pollution Bulletin 2018, 127, 541 -547.
AMA StylePrabhat Ranjan, A.L. Ramanathan, Alok Kumar, Ramanathan AL, Dilip Datta, M. Venkatesh. Trace metal distribution, assessment and enrichment in the surface sediments of Sundarban mangrove ecosystem in India and Bangladesh. Marine Pollution Bulletin. 2018; 127 ():541-547.
Chicago/Turabian StylePrabhat Ranjan; A.L. Ramanathan; Alok Kumar; Ramanathan AL; Dilip Datta; M. Venkatesh. 2018. "Trace metal distribution, assessment and enrichment in the surface sediments of Sundarban mangrove ecosystem in India and Bangladesh." Marine Pollution Bulletin 127, no. : 541-547.
A geochemical and speciation study of As, Fe, Mn, Zn, and Cu was performed using sequential extraction and statistical approaches in the core sediments taken at two locations—Rigni Chhapra and Chaube Chhapra—of the central Gangetic basin (India). A gradual increase in the grain size (varying from clay to coarse sands) was observed in both the core profiles up to 30.5 m depth. The concentrations of analyzed elements ranged as follows: 6.9–14.2 mg/kg for As, 13,849–31,088 mg/kg for Fe, 267–711 mg/kg for Mn, 45–164 mg/kg for Cu for Rigni Chhapra while for Chaube Chhapra the range was 7.5–13.2 mg/kg for As, 10,936–37,052 mg/kg for Fe, 267–1052 mg/kg for Mn, 60–198 mg/kg for Zn and 60–108 mg/kg for Cu. Significant amounts (53–95%) of all the fractionated elemental concentrations were bound within the crystal structure of the minerals as a residual fraction. The reducible fraction was the second most dominant fraction for As (7% and 8%), Fe (3%), Mn (20% and 26%), and Cu (7% and 6%) respectively for both the cores. It may be released when aquifers subjected to changing redox conditions. The acid soluble fraction was of most interest because it could quickly mobilize into the water system which formed the third most dominating among all three fractions. Four color code of sediments showed an association with total As concentration and did not show a relation with any fraction of all elements analyzed. The core sediment was observed enriched with As and other elements (Cu, Fe, Mn, and Zn). However, it fell under uncontaminated to moderately contaminate which might exhibit a low risk in prevailing natural conditions. X-ray diffraction analyses indicated the availability of siderite and magnetite minerals in the core sediments in a section of dark grey with micaceous medium sand with organic matter (black).
Manoj Kumar; Al. Ramanathan. Vertical Geochemical Variations and Speciation Studies of As, Fe, Mn, Zn, and Cu in the Sediments of the Central Gangetic Basin: Sequential Extraction and Statistical Approach. International Journal of Environmental Research and Public Health 2018, 15, 183 .
AMA StyleManoj Kumar, Al. Ramanathan. Vertical Geochemical Variations and Speciation Studies of As, Fe, Mn, Zn, and Cu in the Sediments of the Central Gangetic Basin: Sequential Extraction and Statistical Approach. International Journal of Environmental Research and Public Health. 2018; 15 (2):183.
Chicago/Turabian StyleManoj Kumar; Al. Ramanathan. 2018. "Vertical Geochemical Variations and Speciation Studies of As, Fe, Mn, Zn, and Cu in the Sediments of the Central Gangetic Basin: Sequential Extraction and Statistical Approach." International Journal of Environmental Research and Public Health 15, no. 2: 183.
Chander Kumar Singh; Anand Kumar; Satyanarayan Shashtri; Alok Kumar; Pankaj Kumar; Javed Mallick. Multivariate statistical analysis and geochemical modeling for geochemical assessment of groundwater of Delhi, India. Journal of Geochemical Exploration 2017, 175, 59 -71.
AMA StyleChander Kumar Singh, Anand Kumar, Satyanarayan Shashtri, Alok Kumar, Pankaj Kumar, Javed Mallick. Multivariate statistical analysis and geochemical modeling for geochemical assessment of groundwater of Delhi, India. Journal of Geochemical Exploration. 2017; 175 ():59-71.
Chicago/Turabian StyleChander Kumar Singh; Anand Kumar; Satyanarayan Shashtri; Alok Kumar; Pankaj Kumar; Javed Mallick. 2017. "Multivariate statistical analysis and geochemical modeling for geochemical assessment of groundwater of Delhi, India." Journal of Geochemical Exploration 175, no. : 59-71.
During a 28-year field survey in India (1988–2016), groundwater arsenic contamination and its health effects were registered in the states of West Bengal, Jharkhand, Bihar and Uttar Pradesh in the Ganga River flood plain, and the states of Assam and Manipur in the flood plain of Brahamaputra and Imphal rivers. Groundwater of Rajnandgaon village in Chhattisgarh state, which is not in a flood plain, is also arsenic contaminated. More than 170,000 tubewell water samples from the affected states were analyzed and half of the samples had arsenic >10 μg/L (maximum concentration 3,700 μg/L). Chronic exposure to arsenic through drinking water causes various health problems, like dermal, neurological, reproductive and pregnancy effects, cardiovascular effects, diabetes mellitus, diseases of the respiratory and gastrointestinal systems, and cancers, typically involving the skin, lungs, liver, bladder, etc. About 4.5% of the 8,000 children from arsenic-affected villages of affected states were registered with mild to moderate arsenical skin lesions. In the preliminary survey, more than 10,000 patients were registered with different types of arsenic-related signs and symptoms, out of more than 100,000 people screened from affected states. Elevated levels of arsenic were also found in biological samples (urine, hair, nails) of the people living in affected states. The study reveals that the population who had severe arsenical skin lesions may suffer from multiple Bowens/cancers in the long term. Some unusual symptoms, such as burning sensation, skin itching and watering of eyes in the presence of sun light, were also noticed in arsenicosis patients. Au cours d’une étude sur le terrain, menée en Inde pendant 28 ans (1988–2016), la contamination des eaux souterraines en arsenic et ses effets sur la santé ont été enregistrés dans les états du Bengale occidental, du Jharkhand, du Bihar et de l’Uttar Pradesh dans la plaine d’inondation du Ganges, et dans les états de l’Assam et de Manipur dans la plaine d’inondation du Brahmapoutre et de l’Imphal. Les eaux souterraines sont également contaminées en arsenic dans le village de Rajnandgaon dans l’état de Chhattisgarh, qui n’est pas localisé dans une plaine d’inondation. Plus de 170,000 échantillons d’eau prélevés dans des forages tubés des états affectés par la contamination ont été analysés et la moitié de ces échantillons d’eau ont des concentrations en arsenic supérieures à 10 μg/L (concentration maximum 3,700 μg/L). L’exposition chronique à l’arsenic par l’eau potable cause de nombreux problèmes de santé, comme des problèmes dentaires, neurologiques, des effets sur la reproduction et la grossesse, des effets cardiovasculaires, le diabète sucré, las maladies des systèmes respiratoires et gastro-intestinal, et cancers dont ceux de la peau, des poumons, du foie, de la vessie, etc. Pour environ 4.5% des 8,000 enfants des villages affectés par l’arsenic des états concernés, on enregistre des problèmes faibles à modérés de lésions cutanées liées à l’arsenic. Lors de l’enquête préliminaire, plus de 10,000 des 100,000 personnes étudiées dans les états concernés ont été enregistrées avec différents types de signes et symptômes liés à l’arsenic. Des niveaux élevés en arsenic ont également été trouvés dans les différents échantillons biologiques (urine, ongles, cheveux) des populations vivant dans les états affectés. L’étude révèle que la population qui a de fortes lésions cutanées du fait de l’arsenic souffre de multiples cancers (type maladie de Bowen) sur le long terme. Des symptômes inhabituels, comme des sensations de brulure, des démangeaisons cutanées et des larmoiements en présence de la lumière du soleil, ont été également notés sur les patients atteints d’arsenicose. La contaminación del arsénico del agua subterránea y sus efectos sobre la salud se registraron durante un relevamiento de campo de 28 años en la India (1988–2016) en los estados de Bengala Occidental, Jharkhand, Bihar y Uttar Pradesh en la llanura de inundación del río Ganges y en los estados de Assam y Manipur en la llanura de inundación de los ríos Brahamaputra e Imphal. El agua subterránea de la aldea de Rajnandgaon en el estado de Chhattisgarh, que no está en una llanura de inundación, también está contaminada con arsénico. Se analizaron más de 170,000 muestras de agua de pozos de los estados afectados y la mitad de las muestras tenían arsénico >10 μg/L (concentración máxima 3,700 μg/L). La exposición crónica al arsénico a través del agua potable causa varios problemas de salud, como efectos dérmicos, neurológicos, reproductivos y del embarazo, los efectos cardiovasculares, la diabetes mellitus, las enfermedades de los sistemas respiratorio y gastrointestinal y cánceres que afectan típicamente la piel, los pulmones, etc. Alrededor del 4.5% de los 8,000 niños de las aldeas afectadas por el arsénico de los estados afectados fueron registrados con lesiones arsenicales de leve a moderada. En el relevamiento preliminar, más de 10,000 pacientes fueron registrados con diferentes tipos de signos y síntomas relacionados con el arsénico, de más de 100,000 personas examinadas de los estados afectados. Los niveles elevados de arsénico también se encontraron en muestras biológicas (orina, pelo, uñas) de las personas que viven en los estados afectados. El estudio revela que la población que tenía lesiones arsenicales severas de la piel puede sufrir de múltiples cánceres de la enfermedad de Bowens en el largo plazo. También se observaron en los pacientes con arsenicosis, algunos síntomas inusuales, como sensación de ardor, picazón de la piel y riesgo en ojos en presencia de luz solar....
Dipankar Chakraborti; Mohammad Mahmudur Rahman; Bhaskar Das; Amit Chatterjee; Dipankar Das; Biswajit Nayak; Arup Pal; Uttam Kumar Chowdhury; Sad Ahmed; Bhajan Kumar Biswas; Mrinal Kumar Sengupta; Amir Hossain; Gautam Samanta; M. M. Roy; Rathindra Nath Dutta; Khitish Chandra Saha; Subhas Chandra Mukherjee; Shyamapada Pati; Probir Bijoy Kar; Adreesh Mukherjee; Manoj Kumar. Groundwater arsenic contamination and its health effects in India. Hydrogeology Journal 2017, 25, 1165 -1181.
AMA StyleDipankar Chakraborti, Mohammad Mahmudur Rahman, Bhaskar Das, Amit Chatterjee, Dipankar Das, Biswajit Nayak, Arup Pal, Uttam Kumar Chowdhury, Sad Ahmed, Bhajan Kumar Biswas, Mrinal Kumar Sengupta, Amir Hossain, Gautam Samanta, M. M. Roy, Rathindra Nath Dutta, Khitish Chandra Saha, Subhas Chandra Mukherjee, Shyamapada Pati, Probir Bijoy Kar, Adreesh Mukherjee, Manoj Kumar. Groundwater arsenic contamination and its health effects in India. Hydrogeology Journal. 2017; 25 (4):1165-1181.
Chicago/Turabian StyleDipankar Chakraborti; Mohammad Mahmudur Rahman; Bhaskar Das; Amit Chatterjee; Dipankar Das; Biswajit Nayak; Arup Pal; Uttam Kumar Chowdhury; Sad Ahmed; Bhajan Kumar Biswas; Mrinal Kumar Sengupta; Amir Hossain; Gautam Samanta; M. M. Roy; Rathindra Nath Dutta; Khitish Chandra Saha; Subhas Chandra Mukherjee; Shyamapada Pati; Probir Bijoy Kar; Adreesh Mukherjee; Manoj Kumar. 2017. "Groundwater arsenic contamination and its health effects in India." Hydrogeology Journal 25, no. 4: 1165-1181.
Spatial distribution and interrelationship among organic nutrients - silica and carbon - and various lithogenic elements were investigated in the surficial sediments of Matla estuary and Core Zone of Indian Sundarbans Reserve Forest using spatial analysis and multivariate statistics. Biogenic silica (BSi), an important parameter for coastal biogeochemisry, was measured using Si-time alkaline leaching method. BSi concentration ranged from 0.01% to 0.85% with higher concentrations in upstream region of Matla estuary and attenuated values towards the bay, seemingly due to changes in hydrodynamics and land use conditions. Spatial distribution of BSi did not exhibit significant correlation with sediment parameters of organic carbon (OC), elemental composition and clay content. However, it showed significant contrasting trends with total phosphorus (TP) and total silica of human influenced Matla estuary sediments as well as the dissolved silica (DSi) of its surface waters. Anthropogenic influence on sediment geochemistry is discernable with the presence of higher concentrations of organic and inorganic elements in Matla estuary than in Core Zone sediments. Spatial variation trends are often challenging to interpret due to multiple sources of input, varying energy and salinity conditions and constant physical, chemical and biological alterations occurring in the environment. Nonetheless, it is certain that anthropogenic activities have a substantial influence on biogeochemical processes of Sundarbans mangrove-estuarine complex and potentially the coastal ocean.
Shreya Dhame; Alok Kumar; Al. Ramanathan; Punarbasu Chaudhari. Elemental composition, distribution and control of biogenic silica in the anthropogenically disturbed and pristine zone inter-tidal sediments of Indian Sundarbans mangrove-estuarine complex. Marine Pollution Bulletin 2016, 111, 68 -85.
AMA StyleShreya Dhame, Alok Kumar, Al. Ramanathan, Punarbasu Chaudhari. Elemental composition, distribution and control of biogenic silica in the anthropogenically disturbed and pristine zone inter-tidal sediments of Indian Sundarbans mangrove-estuarine complex. Marine Pollution Bulletin. 2016; 111 (1-2):68-85.
Chicago/Turabian StyleShreya Dhame; Alok Kumar; Al. Ramanathan; Punarbasu Chaudhari. 2016. "Elemental composition, distribution and control of biogenic silica in the anthropogenically disturbed and pristine zone inter-tidal sediments of Indian Sundarbans mangrove-estuarine complex." Marine Pollution Bulletin 111, no. 1-2: 68-85.
This study is an investigation on spatio-chemical, contamination sources (using multivariate statistics), and health risk assessment arising from the consumption of groundwater contaminated with trace and toxic elements in the Chhaprola Industrial Area, Gautam Buddha Nagar, Uttar Pradesh, India. In this study 33 tubewell water samples were analyzed for 28 elements using ICP-OES. Concentration of some trace and toxic elements such as Al, As, B, Cd, Cr, Mn, Pb and U exceeded their corresponding WHO (2011) guidelines and BIS (2012) standards while the other analyzed elements remain below than those values. Background γ and β radiation levels were observed and found to be within their acceptable limits. Multivariate statistics PCA (explains 82.07 cumulative percent for total 6 of factors) and CA indicated (mixed origin) that natural and anthropogenic activities like industrial effluent and agricultural runoff are responsible for the degrading of groundwater quality in the research area. In this study area, an adult consumes 3.0 L (median value) of water therefore consuming 39, 1.94, 1461, 0.14, 11.1, 292.6, 13.6, 23.5 μg of Al, As, B, Cd, Cr, Mn, Pb and U from drinking water per day respectively. The hazard quotient (HQ) value exceeded the safe limit of 1 which for As, B, Al, Cr, Mn, Cd, Pb and U at few locations while hazard index (HI) > 5 was observed in about 30% of the samples which indicated potential health risk from these tubewells for the local population if the groundwater is consumed.
Manoj Kumar; Al. Ramanathan; Ritu Tripathi; Sandhya Farswan; Devendra Kumar; Prosun Bhattacharya. A study of trace element contamination using multivariate statistical techniques and health risk assessment in groundwater of Chhaprola Industrial Area, Gautam Buddha Nagar, Uttar Pradesh, India. Chemosphere 2016, 166, 135 -145.
AMA StyleManoj Kumar, Al. Ramanathan, Ritu Tripathi, Sandhya Farswan, Devendra Kumar, Prosun Bhattacharya. A study of trace element contamination using multivariate statistical techniques and health risk assessment in groundwater of Chhaprola Industrial Area, Gautam Buddha Nagar, Uttar Pradesh, India. Chemosphere. 2016; 166 ():135-145.
Chicago/Turabian StyleManoj Kumar; Al. Ramanathan; Ritu Tripathi; Sandhya Farswan; Devendra Kumar; Prosun Bhattacharya. 2016. "A study of trace element contamination using multivariate statistical techniques and health risk assessment in groundwater of Chhaprola Industrial Area, Gautam Buddha Nagar, Uttar Pradesh, India." Chemosphere 166, no. : 135-145.
Manoj Kumar; Al Ramanathan; M Rahman; Ravi Naidu; Prosun Bhattacharya. Arsenic and trace elements in groundwater, vegetables and selected food grains from middle Gangetic plain—human health perspective. Arsenic in the Environment - Proceedings 2016, 320 -321.
AMA StyleManoj Kumar, Al Ramanathan, M Rahman, Ravi Naidu, Prosun Bhattacharya. Arsenic and trace elements in groundwater, vegetables and selected food grains from middle Gangetic plain—human health perspective. Arsenic in the Environment - Proceedings. 2016; ():320-321.
Chicago/Turabian StyleManoj Kumar; Al Ramanathan; M Rahman; Ravi Naidu; Prosun Bhattacharya. 2016. "Arsenic and trace elements in groundwater, vegetables and selected food grains from middle Gangetic plain—human health perspective." Arsenic in the Environment - Proceedings , no. : 320-321.
The systematic and comprehensive geochemical analysis of fluoride (F) in twenty agricultural soil samples was carried out to understand spatial variability, mechanism of retention and release, and the areas of potential risk due to high concentrations of F in soil around Sidhi District, Central India. The spatial variations in physico-chemical parameters revealed significant difference in the methods of cultivation due to geomorphological constraints, availability of surface water and ground water etc., in the study area. The north and small pocket in central Sidhi were rich in fertile soils due to availability of surface and ground water. The southern and eastern Sidhi were rainfed areas, hence, the monocropping system by traditional methods showed less impact on the soil physico-chemical parameters. The soil F varied from 366.94 to 1178 mg/kg and 2-4 times greater than the background soil value (320 mg/kg) of the world. The pollution indexes were > 1 indicating prevalence of elevated soil fluorine.
Bijendra Kumar; Asmaa Naaz; Kriti Shukla; Chandravir Narayan; Govind Singh; Alok Kumar; Al Ramanathan; Ramanathan AL. Spatial variability of fluorine in agricultural soils around Sidhi District, Central India. Journal of the Geological Society of India 2016, 87, 227 -235.
AMA StyleBijendra Kumar, Asmaa Naaz, Kriti Shukla, Chandravir Narayan, Govind Singh, Alok Kumar, Al Ramanathan, Ramanathan AL. Spatial variability of fluorine in agricultural soils around Sidhi District, Central India. Journal of the Geological Society of India. 2016; 87 (2):227-235.
Chicago/Turabian StyleBijendra Kumar; Asmaa Naaz; Kriti Shukla; Chandravir Narayan; Govind Singh; Alok Kumar; Al Ramanathan; Ramanathan AL. 2016. "Spatial variability of fluorine in agricultural soils around Sidhi District, Central India." Journal of the Geological Society of India 87, no. 2: 227-235.
The distribution, enrichment, and ecotoxicity potential of Bangladesh part of Sundarban mangrove was investigated for eight trace metals (As, Cd, Cr, Cu, Fe, Mn, Pb, and Zn) using sediment quality assessment indices. The average concentration of trace metals in the sediments exceeded the crustal abundance suggesting sources other than natural in origin. Additionally, the trace metals profile may be a reflection of socio-economic development in the vicinity of Sundarban which further attributes trace metals abundance to the anthropogenic inputs. A total of eleven surficial sediment samples were collected along a vertical transect along the freshwater–saline water gradient. The sediment samples were digested using EPA 3051 method and were analyzed on ICP-MS. Geo-accumulation index suggests moderately polluted sediment quality with respect to Ni and As and background concentrations for Al, Fe, Mn, Cu, Zn, Pb, Co, As, and Cd. Contamination factor analysis suggested low contamination by Zn, Cr, Co, and Cd, moderate by Fe, Mn, Cu, and Pb while Ni and As show considerable and high contamination, respectively. Enrichment factors for Ni, Pb, and As suggests high contamination from either biota or anthropogenic inputs besides natural enrichment. As per the three sediment quality guidelines, Fe, Mn, Cu, Ni, Co, and As would be more of a concern with respect to ecotoxicological risk in the Sundarban mangroves. The correlation between various physiochemical variables and trace metals suggested significant role of fine grained particles (clay) in trace metal distribution whereas owing to low organic carbon content in the region the organic complexation may not be playing significant role in trace metal distribution in the Sundarban mangroves.
Alok Kumar; Al. Ramanathan; M. B. K. Prasad; Dilip Datta; Manoj Kumar; Ramanathan AL. Distribution, enrichment, and potential toxicity of trace metals in the surface sediments of Sundarban mangrove ecosystem, Bangladesh: a baseline study before Sundarban oil spill of December, 2014. Environmental Science and Pollution Research 2016, 23, 8985 -8999.
AMA StyleAlok Kumar, Al. Ramanathan, M. B. K. Prasad, Dilip Datta, Manoj Kumar, Ramanathan AL. Distribution, enrichment, and potential toxicity of trace metals in the surface sediments of Sundarban mangrove ecosystem, Bangladesh: a baseline study before Sundarban oil spill of December, 2014. Environmental Science and Pollution Research. 2016; 23 (9):8985-8999.
Chicago/Turabian StyleAlok Kumar; Al. Ramanathan; M. B. K. Prasad; Dilip Datta; Manoj Kumar; Ramanathan AL. 2016. "Distribution, enrichment, and potential toxicity of trace metals in the surface sediments of Sundarban mangrove ecosystem, Bangladesh: a baseline study before Sundarban oil spill of December, 2014." Environmental Science and Pollution Research 23, no. 9: 8985-8999.
Phosphorus (P) fractionation was carried out using sequential extraction method in twenty composite agricultural soil samples to assess the soil fertility of irrigated and rainfed areas around Sidhi district, Central India. The results showed alterations in the biogeochemical relationships between physicochemical parameters. In rainfed areas, the high Si/Al and low Fe/Al ratios showed silicate nature of agricultural soils along with low Fe loss from primary silicates. The relative abundance of P was as follows: Res-P > DNRP > NaOH-Pi > HCl-Pi > HA-P > KCl-Pi. The P content calculated as the sum of different fractions found to have an average variation of ±1.34% of the total P (TP) obtained by acid digestion. The concentrations of inorganic P fractions were similar in the irrigated and rainfed areas. The organic P was relatively greater in the irrigated soils. The sum of NaOH-Pi, DNRP and Res-P accounted for >70%, while Pi and Po accounted for 55.3 and 43.3% of total P, respectively. The factor analysis revealed that the chemical fractions of P were controlled by pH, clay minerals and oxy-hydroxides. Top
Kriti Shukla; Bijendra Kumar; Asmaa Naaz; Chandravir Narayan; Govind Singh; Alok Kumar; Al. Ramanathan; Anshumali; Shukla Kriti; Kumar Bijendra Naaz Asmaa Narayan Chandravir Singh Govind; Kumar Alok; Ramanathan AL. Phosphorus fractions in irrigated and rainfed agricultural soils of central India. Journal of the Indian Society of Soil Science 2016, 64, 148 .
AMA StyleKriti Shukla, Bijendra Kumar, Asmaa Naaz, Chandravir Narayan, Govind Singh, Alok Kumar, Al. Ramanathan, Anshumali, Shukla Kriti, Kumar Bijendra Naaz Asmaa Narayan Chandravir Singh Govind, Kumar Alok, Ramanathan AL. Phosphorus fractions in irrigated and rainfed agricultural soils of central India. Journal of the Indian Society of Soil Science. 2016; 64 (2):148.
Chicago/Turabian StyleKriti Shukla; Bijendra Kumar; Asmaa Naaz; Chandravir Narayan; Govind Singh; Alok Kumar; Al. Ramanathan; Anshumali; Shukla Kriti; Kumar Bijendra Naaz Asmaa Narayan Chandravir Singh Govind; Kumar Alok; Ramanathan AL. 2016. "Phosphorus fractions in irrigated and rainfed agricultural soils of central India." Journal of the Indian Society of Soil Science 64, no. 2: 148.
Manoj Kumar; A.L. Ramanathan. MAGNITUDE OF INORGANIC ARSENIC CONTAMINATION INGROUNDWATERS OF MIDDLE GANGETIC BASIN OF UTTAR PRADESH AND BIHAR, INDIA. GSA Annual Meeting in Denver, Colorado, USA - 2016 2016, 1 .
AMA StyleManoj Kumar, A.L. Ramanathan. MAGNITUDE OF INORGANIC ARSENIC CONTAMINATION INGROUNDWATERS OF MIDDLE GANGETIC BASIN OF UTTAR PRADESH AND BIHAR, INDIA. GSA Annual Meeting in Denver, Colorado, USA - 2016. 2016; ():1.
Chicago/Turabian StyleManoj Kumar; A.L. Ramanathan. 2016. "MAGNITUDE OF INORGANIC ARSENIC CONTAMINATION INGROUNDWATERS OF MIDDLE GANGETIC BASIN OF UTTAR PRADESH AND BIHAR, INDIA." GSA Annual Meeting in Denver, Colorado, USA - 2016 , no. : 1.
This study investigates the level of contamination and health risk assessment for arsenic (As) and other elements in drinking water, vegetables and other food components in two blocks (Mohiuddinagar and Mohanpur) from the Samastipur district, Bihar, India. Groundwater (80%) samples exceeded the World Health Organization (WHO) guideline value (10. µg/L) of As while Mn exceeded the previous WHO limit of 400. µg/L in 28% samples. The estimated daily intake of As, Cd, Co, Cr, Cu, Mn, Ni, Pb and Zn from drinking water and food components were 169, 19, 26, 882, 4645, 14582, 474, 1449 and 12,955. µg, respectively (estimated exposure 3.70, 0.41, 0.57, 19.61, 103.22, 324.05, 10.53, 32.21 and 287.90. µg per kg bw, respectively). Twelve of 15 cooked rice contained high As concentration compared to uncooked rice. Water contributes (67%) considerable As to daily exposure followed by rice and vegetables. Whereas food is the major contributor of other elements to the dietary exposure. Correlation and principal component analysis (PCA) indicated natural source for As but for other elements, presence of diffused anthropogenic activities were responsible. The chronic daily intake (CDI) and health risk index (HRI) were also estimated from the generated data. The HRI were >. 1 for As in drinking water, vegetables and rice, for Mn in drinking water, vegetables, rice and wheat, for Pb in rice and wheat indicated the potential health risk to the local population. An assessment of As and other elements of other food components should be conducted to understand the actual health hazards caused by ingestion of food in people residing in the middle Gangetic plain
Manoj Kumar; Mohammad Mahmudur Rahman; Al. Ramanathan; Ravi Naidu. Arsenic and other elements in drinking water and dietary components from the middle Gangetic plain of Bihar, India: Health risk index. Science of The Total Environment 2016, 539, 125 -134.
AMA StyleManoj Kumar, Mohammad Mahmudur Rahman, Al. Ramanathan, Ravi Naidu. Arsenic and other elements in drinking water and dietary components from the middle Gangetic plain of Bihar, India: Health risk index. Science of The Total Environment. 2016; 539 ():125-134.
Chicago/Turabian StyleManoj Kumar; Mohammad Mahmudur Rahman; Al. Ramanathan; Ravi Naidu. 2016. "Arsenic and other elements in drinking water and dietary components from the middle Gangetic plain of Bihar, India: Health risk index." Science of The Total Environment 539, no. : 125-134.
Intense agricultural and mining/industrial activities make groundwater quality vulnerable to contaminants. This study conducted in one of the mining areas of Panna district evaluated the factors influencing the groundwater hydrogeochemistry using water quality parameters and multi-isotopic approach considering the fact that groundwater is the only major source of drinking water. Forty-five water samples comprising both shallow and deep aquifers were collected and analyzed for major ions, δ18O, and δD. The geochemical data were used to characterize and classify water samples based on a multitude of ion plots and diagrams. The groundwater in the region is found to be contaminated with fluoride and nitrate. The sources for fluoride are mostly geogenic in nature. The alkaline nature of groundwater triggers replacement of the exchangeable fluoride from minerals like biotite/muscovite and results in its enrichment. In addition, it is contributed through leaching of fluorides from granitic rocks, abundantly present in the study area. The weathering of these fluoride-bearing minerals releases fluoride into the groundwater. On the other hand, nitrate enrichment is mainly attributed to leaching from untreated sewerage system and agricultural runoff containing nutrients from excess use of fertilizers. The stable isotopic composition for most of the collected samples was found to be near the local meteoric water line (LMWL), i.e., origin of ground water is meteoric in principle; however, the point away from the LMWL might favor exchange with rock minerals and evaporation processes. This study sets an important background for decision makers to take the suitable countermeasures from the public health perspective for sustainable water resources management.
Pankaj Kumar; Alok Kumar; Chander Kumar Singh; Chitresh Saraswat; Ram Avtar; A. L. Ramanathan; Srikantha Herath. Hydrogeochemical Evolution and Appraisal of Groundwater Quality in Panna District, Central India. Exposure and Health 2015, 8, 19 -30.
AMA StylePankaj Kumar, Alok Kumar, Chander Kumar Singh, Chitresh Saraswat, Ram Avtar, A. L. Ramanathan, Srikantha Herath. Hydrogeochemical Evolution and Appraisal of Groundwater Quality in Panna District, Central India. Exposure and Health. 2015; 8 (1):19-30.
Chicago/Turabian StylePankaj Kumar; Alok Kumar; Chander Kumar Singh; Chitresh Saraswat; Ram Avtar; A. L. Ramanathan; Srikantha Herath. 2015. "Hydrogeochemical Evolution and Appraisal of Groundwater Quality in Panna District, Central India." Exposure and Health 8, no. 1: 19-30.
Grain size is a fundamental descriptive measure of sediment and sedimentary rock. A large part of information related to sedimentary particles transport and deposition can be obtained from grain size. Grain size parameters are useful for recognizing sedimentary environments such as dune, river, beach marine and others of continental shelf through graphical, moment and statistical methods. Bivariate plots between various statistical grain size parameters can be successfully used for distinction of such environments. The present study aims at grain size analysis of fifty sediment samples collected from Thar desert of India. The statistical grain size parameters were treated using different statistical tools such as factor and discriminatory analysis to decipher the depositional history of the sediments of the study region. The analysis suggests that the sediments mainly deposited in fluvial to beach environment along with aeolian deposition. The shape and composition of the sediments grains were also studied using energy dispersive X-ray spectroscopyscanning electron microscope (EDX-SEM) which suggested the dominance of fluvial environment in the deposition.
Chander Kumar Singh; Pankaj Kumar; Alok Kumar; Saumitra Mukherjee. Depositional environment in great Indian desert using grain size parameters and its chemical characterization. Journal of the Geological Society of India 2015, 86, 412 -420.
AMA StyleChander Kumar Singh, Pankaj Kumar, Alok Kumar, Saumitra Mukherjee. Depositional environment in great Indian desert using grain size parameters and its chemical characterization. Journal of the Geological Society of India. 2015; 86 (4):412-420.
Chicago/Turabian StyleChander Kumar Singh; Pankaj Kumar; Alok Kumar; Saumitra Mukherjee. 2015. "Depositional environment in great Indian desert using grain size parameters and its chemical characterization." Journal of the Geological Society of India 86, no. 4: 412-420.