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The Xiong’an New Area (XA) was established as a development hub in China. Excessive exploitation of groundwater has caused a series of environmental and geological problems, restricting further development of XA. The widely distributed ponds in this area have been targeted as convenient and efficient sites of artificial groundwater recharge. However, nitrogen accumulation in the shallow vadose zone associated with agricultural activities may pose environmental risks to groundwater during the recharge and infiltration process. Therefore, this study investigated the effects, transfer, and transformation of nitrogen during artificial groundwater recharge. The aeration zone is thick and the medium comprises fine particles, with total nitrogen and nitrate accumulation mainly in the shallow aeration zone. In indoor experiments, the nitrate removal rate reached 83.5% when organic carbon in the source water was increased by 10 mg/L. For Baigou diversion river water(BW) with slightly higher (14.46 mg/L) and lower (5.04 mg/L) nitrate contents, the nitrate content decreased by 26.0% (10.70 mg/L) and 26.8% (3.69 mg/L), respectively, after 150 days. When the water head was increased by 20 cm to increase the recharge rate, the time required for nitrate and ammonium to reach the maximum and equilibrium concentration was reduced by 50%. These findings indicate that nitrogen concentration in the source water, aeration zone media, and groundwater should be considered in pond replenishment. It is also necessary to control the concentration of organic carbon and the rate of recharge, which would provide guidance for other similar projects.
Guigui Xu; Xiaosi Su; Zhijiang Yuan; Liang Ji; Ningfei Li; Haiting Liang. Nitrogen behavior during artificial groundwater recharge through ponds: A case study in Xiong’an New Area. Environmental Geochemistry and Health 2021, 1 -17.
AMA StyleGuigui Xu, Xiaosi Su, Zhijiang Yuan, Liang Ji, Ningfei Li, Haiting Liang. Nitrogen behavior during artificial groundwater recharge through ponds: A case study in Xiong’an New Area. Environmental Geochemistry and Health. 2021; ():1-17.
Chicago/Turabian StyleGuigui Xu; Xiaosi Su; Zhijiang Yuan; Liang Ji; Ningfei Li; Haiting Liang. 2021. "Nitrogen behavior during artificial groundwater recharge through ponds: A case study in Xiong’an New Area." Environmental Geochemistry and Health , no. : 1-17.
This study aimed to accurately understand the interaction between surface water and groundwater in the alluvial plain (Anqing section) of the lower Yangtze River basin. To this end, the distribution characteristics of hydrogen and oxygen stable isotopes and 222Rn isotopes in different water bodies were analyzed using the multiple environmental isotope tracing method. The results show that the Yangtze River is generally recharged by groundwater in the alluvial plain (Anqing section), whereas it is stimulated by human activities to recharge groundwater in the urban section of Anqing; the first-order stream of the Yangtze River, the Wan River, receives groundwater recharge in the hilly area and recharges groundwater in the flat area. The main sources of groundwater in the alluvial plain are precipitation and lake water, which account for 45.25% and 54.75%, respectively, of the total recharge. This study provides a reliable scientific basis for quality evaluation, pollution prevention and remediation of the water resources in the alluvial plain (Anqing section) of the lower Yangtze River basin.
Qiaohui Che; Xiaosi Su; Shida Zheng; Yunfeng Li. Interaction between surface water and groundwater in the Alluvial Plain (anqing section) of the lower Yangtze River Basin: environmental isotope evidence. Journal of Radioanalytical and Nuclear Chemistry 2021, 329, 1331 -1343.
AMA StyleQiaohui Che, Xiaosi Su, Shida Zheng, Yunfeng Li. Interaction between surface water and groundwater in the Alluvial Plain (anqing section) of the lower Yangtze River Basin: environmental isotope evidence. Journal of Radioanalytical and Nuclear Chemistry. 2021; 329 (3):1331-1343.
Chicago/Turabian StyleQiaohui Che; Xiaosi Su; Shida Zheng; Yunfeng Li. 2021. "Interaction between surface water and groundwater in the Alluvial Plain (anqing section) of the lower Yangtze River Basin: environmental isotope evidence." Journal of Radioanalytical and Nuclear Chemistry 329, no. 3: 1331-1343.
Water shortage and overexploitation of groundwater (GW) have become the key factors restricting the development of the Xiongan New Area (XNA), the environmental management of Baiyangdian Lake, and the social and economic development of surrounding areas. This study used a numerical GW flow model to quantitatively analyze the changes to the shallow GW level and GW reserves of the plain area of the Daqing River Basin over the next 15 years (2021–2035) under different artificial recharge schemes with the south to north water diversion project (SNWDP) acting as the GW recharge source. The results showed increasing GW storage and GW levels and that the regional GW resources are in a positive equilibrium state. The rates of change of the well irrigation supply scheme and the joint river-well irrigation supply scheme in the XNA will increase by 14.56% and 11.04% by 2035 as compared with the current situation. The well irrigation recharge scheme for the XNA was determined to be the most effective when comparing with the effects of the different artificial recharge schemes on the GW levels and recharge. This study provides a reference for the management and protection of aquifers in other areas suffering serious GW overexploitation.
Guangyao Chi; Xiaosi Su; Hang Lyu; Guigui Xu; Yiwu Zhang; Ningfei Li. Simulating the Shallow Groundwater Level Response to Artificial Recharge and Storage in the Plain Area of the Daqing River Basin, China. Sustainability 2021, 13, 5626 .
AMA StyleGuangyao Chi, Xiaosi Su, Hang Lyu, Guigui Xu, Yiwu Zhang, Ningfei Li. Simulating the Shallow Groundwater Level Response to Artificial Recharge and Storage in the Plain Area of the Daqing River Basin, China. Sustainability. 2021; 13 (10):5626.
Chicago/Turabian StyleGuangyao Chi; Xiaosi Su; Hang Lyu; Guigui Xu; Yiwu Zhang; Ningfei Li. 2021. "Simulating the Shallow Groundwater Level Response to Artificial Recharge and Storage in the Plain Area of the Daqing River Basin, China." Sustainability 13, no. 10: 5626.
As an essential component for the development of the Xiong’an New Area, China’s second capital, groundwater in the area has been overexploited, resulting in ecological and environmental geological problems. Therefore, artificial groundwater replenishment measures are urgently required, for which the evaluation of the recharge potential is an important prerequisite. In this study, a GIS (Geographic Information System)-based multi-criteria evaluation system was constructed, considering the source water conditions, recharge infiltration conditions, aquifer storage conditions, and environmental conditions. In addition, factors such as the distance to a canal, source water quality, slope, vadose zone infiltration rate, drainage density, groundwater depth, aquifer hydraulic conductivity, aquifer thickness, groundwater quality, soil quality, and distance to sensitive areas were also analyzed. GIS was used to draw and calculate potential artificial recharge sites. The results showed that the potential recharge sites in the study area are mainly distributed in the alluvial plains on both sides of the river, with a total area of 2103.9 km2, accounting for 15.8% of the total study area. In the Xiong’an New Area, the potential sites are mainly distributed in the alluvial–proluvial plains on both sides of the Baigou River in the north-central area, with a total area of 39.4 km2, accounting for approximately 2.2% of the total area of the Xiong’an New Area.
Guigui Xu; Xiaosi Su; Yiwu Zhang; Bing You. Identifying Potential Sites for Artificial Recharge in the Plain Area of the Daqing River Catchment Using GIS-Based Multi-Criteria Analysis. Sustainability 2021, 13, 3978 .
AMA StyleGuigui Xu, Xiaosi Su, Yiwu Zhang, Bing You. Identifying Potential Sites for Artificial Recharge in the Plain Area of the Daqing River Catchment Using GIS-Based Multi-Criteria Analysis. Sustainability. 2021; 13 (7):3978.
Chicago/Turabian StyleGuigui Xu; Xiaosi Su; Yiwu Zhang; Bing You. 2021. "Identifying Potential Sites for Artificial Recharge in the Plain Area of the Daqing River Catchment Using GIS-Based Multi-Criteria Analysis." Sustainability 13, no. 7: 3978.
The upper part of riverbed sediment is one of the key interfaces between surface water and groundwater, and biogeochemical process in this interface has a profound influence on the chemistry of infiltrated water. The lithology and permeability of bed sediment is mainly controlled by variation in river hydrodynamic conditions. However, there have been few studies of the effect of riverbed siltation on the hydrochemistry and redox reactions of infiltrated water due to the high variability in these processes and challenges associated with sampling. This study selected and examined a river channel near a site of riverbank filtration by drilling on the floating platform and conducting microelectrode testing and high-resolution sampling. The hydrodynamic and chemical characteristics of pore water in and lithologic characteristics of riverbed sediment, the siltation, and redox zone were examined and compared. Differences in hydrodynamic conditions changed the lithology of riverbed sediment, consequently affecting redox reactions during the process of river water infiltration. Variations in siltation changed the residence time of pore water and organic matter content, which ultimately resulted in differences in extension range and intensity of redox reactions. This study provides a valuable reference for understanding the effect of riverbed siltation on water quality of riverbank infiltration.
Jiamei Wang; Yumeng Yan; Jing Bai; Xiaosi Su. Influences of riverbed siltation on redox zonation during bank filtration: a case study of Liao River, Northeast China. Water Policy 2020, 51, 1478 -1489.
AMA StyleJiamei Wang, Yumeng Yan, Jing Bai, Xiaosi Su. Influences of riverbed siltation on redox zonation during bank filtration: a case study of Liao River, Northeast China. Water Policy. 2020; 51 (6):1478-1489.
Chicago/Turabian StyleJiamei Wang; Yumeng Yan; Jing Bai; Xiaosi Su. 2020. "Influences of riverbed siltation on redox zonation during bank filtration: a case study of Liao River, Northeast China." Water Policy 51, no. 6: 1478-1489.
Infiltration from natural rivers or streams is the most important source of aquifer recharge at riverbank filtration (RBF) sites. Due to the influence of river hydrological processes and changes in suspended solids in rivers, riverbed sediments often undergo significant flushing and clogging processes, which lead to obvious spatial and temporal changes in riverbed sediment permeability. Moreover, the lithology, structure, and thickness of natural riverbed sediments change with time, influencing the bank infiltration rate into groundwater. At present, how riverbed-sediment flushing and clogging influences the sediment hydraulic conductivity is not fully understood, which results in high uncertainty about the amount of water involved in RBF. An RBF site in the middle reach of the Second Songhua River, northeastern China, was studied, and continuous time series data of riverbed-sediment hydraulic conductivity were obtained for the first time. By identifying the hydrological conditions, using field monitoring, laboratory experiments and field tests, the mechanisms of change associated with sediment lithology, infiltration rate, and hydraulic conductivity during flushing and clogging processes were revealed.
Geng Cui; Xiaosi Su; Yan Liu; Shida Zheng. Effect of riverbed sediment flushing and clogging on river-water infiltration rate: a case study in the Second Songhua River, Northeast China. Hydrogeology Journal 2020, 29, 551 -565.
AMA StyleGeng Cui, Xiaosi Su, Yan Liu, Shida Zheng. Effect of riverbed sediment flushing and clogging on river-water infiltration rate: a case study in the Second Songhua River, Northeast China. Hydrogeology Journal. 2020; 29 (2):551-565.
Chicago/Turabian StyleGeng Cui; Xiaosi Su; Yan Liu; Shida Zheng. 2020. "Effect of riverbed sediment flushing and clogging on river-water infiltration rate: a case study in the Second Songhua River, Northeast China." Hydrogeology Journal 29, no. 2: 551-565.
The origin of soil selenium (Se) is relatively complex, and analysis of the origin of soil Se is of great significance in clarifying the cause of its richness and the impact of human activities on soil environmental quality, as well as assisting in the scientific planning of Se-rich land use, improving land use value, and promoting regional economic development. In this study, in order to identify and clarify the origin of soil Se and the causes of its richness in a typical agricultural area in the Hamatong River Basin of the Sanjiang Plain, we tested the Se concentrations in soil, atmospheric deposition, irrigation water, chemical fertilizer, rock, and rice crop samples from the study area. Geostatistical analysis indicated that the soil Se is mainly controlled by natural factors such as soil parent material. Elemental geochemical analysis indicated the soil Se is mainly derived from the granite occurring in the Wanda Mountains. Elemental mass balance analysis indicated that the atmospheric deposition is the most important source of soil Se input, with a contribution of 84.90%, followed by irrigation and fertilization. Deep percolation is the main pathway of soil Se output, with a contribution of 74.17%, followed by rice crop harvest and volatilization. In addition, the soil Se is derived from a natural source, its richness can be attributed to the effect of anthropogenic factors, such as fossil fuel combustion and fertilization, superimposed on the high natural background value of soil Se.
Tiejun Song; Geng Cui; Xiaosi Su; Jin He; Shouzheng Tong; Yan Liu. The origin of soil selenium in a typical agricultural area in Hamatong River Basin, Sanjiang Plain, China. CATENA 2019, 185, 104355 .
AMA StyleTiejun Song, Geng Cui, Xiaosi Su, Jin He, Shouzheng Tong, Yan Liu. The origin of soil selenium in a typical agricultural area in Hamatong River Basin, Sanjiang Plain, China. CATENA. 2019; 185 ():104355.
Chicago/Turabian StyleTiejun Song; Geng Cui; Xiaosi Su; Jin He; Shouzheng Tong; Yan Liu. 2019. "The origin of soil selenium in a typical agricultural area in Hamatong River Basin, Sanjiang Plain, China." CATENA 185, no. : 104355.
In this study, we collected crop plants and associated soil samples and determined these for selenium (Se) content to analyze the uptake, enrichment, and translocation of Se in the different soil–plant systems of an agricultural production area, elucidate the dynamic mechanisms relating to Se content in plants and soil during different growth periods, and screen plants for high Se enrichment ability. Bioconcentration factor determinations indicated that the grains of rice have the strongest Se enrichment ability, followed by soybean and corn. Translocation factor analysis indicated that the grains of rice and corn have similar low translocation abilities for Se compared with soybean. Within the study area, the Se content in plants was closely related to the soil available Se content and varied considerably among different growth periods and plant organs. This study provides a theoretical basis for the development and utilization of local agricultural products.
Tiejun Song; Xiaosi Su; Jin He; Yukai Liang; Tao Zhou; Cong Liu. Selenium (Se) uptake and dynamic changes of Se content in soil–plant systems. Environmental Science and Pollution Research 2018, 25, 34343 -34350.
AMA StyleTiejun Song, Xiaosi Su, Jin He, Yukai Liang, Tao Zhou, Cong Liu. Selenium (Se) uptake and dynamic changes of Se content in soil–plant systems. Environmental Science and Pollution Research. 2018; 25 (34):34343-34350.
Chicago/Turabian StyleTiejun Song; Xiaosi Su; Jin He; Yukai Liang; Tao Zhou; Cong Liu. 2018. "Selenium (Se) uptake and dynamic changes of Se content in soil–plant systems." Environmental Science and Pollution Research 25, no. 34: 34343-34350.
A promising and easily prepared catalytic filler media, manganese-oxide-coated zeolite (MOCZ), for the removal of Mn (II) contamination in groundwater was studied. The optimal condition for MOCZ preparation was given as follows: acid activation of zeolite with 5% HCl mass percent for 12 h, then soaking of acid-activated zeolite with 7% KMnO4 mass percent for 8 h, and finally calcination at 300°C for 5 h. Acid activation significantly enlarged the specific surface area of the zeolite (>79 m2 g−1), subsequently enhancing the coating of manganese oxides onto the surface of the zeolite. This was further supported by the manganese-to-zeolite ratio (γMn) and Energy dispersive analysis-mapping. The γMn was over 12.26 mg Mn g−1 zeolite, representing more active sites for the adsorption and catalytic-oxidation of Mn (II). As such, great performance of Mn (II) removal by MOCZ was obtained in the filter experiment. An estimated 98–100% removal efficiency of Mn (II) was achieved in a greatly short startup time (only 2 h). During the filtration process, newborn flocculent manganese oxides with a mixed-valence of manganese (Mn (II) and Mn (IV)) were generated on the MOCZ surface, further facilitating the adsorption and catalytic-oxidation of Mn (II). The filter with MOCZ as adsorbent had a great performance on the Mn (II) removal in a wide range of hydraulic retention time (HRT) (4–40 min), particularly in a short HRT. Besides, the filter prolonged the filtration period (60 days), which would significantly reduce the frequency of backwash. Thus, it could be concluded that MOCZ prepared in this study showed a good performance in terms of Mn (II) removal in waterworks, especially small waterworks in the villages/towns.
Cong Lyu; Xuejiao Yang; Shengyu Zhang; Qihui Zhang; Xiaosi Su. Preparation and performance of manganese-oxide-coated zeolite for the removal of manganese-contamination in groundwater. Environmental Technology 2017, 40, 878 -887.
AMA StyleCong Lyu, Xuejiao Yang, Shengyu Zhang, Qihui Zhang, Xiaosi Su. Preparation and performance of manganese-oxide-coated zeolite for the removal of manganese-contamination in groundwater. Environmental Technology. 2017; 40 (7):878-887.
Chicago/Turabian StyleCong Lyu; Xuejiao Yang; Shengyu Zhang; Qihui Zhang; Xiaosi Su. 2017. "Preparation and performance of manganese-oxide-coated zeolite for the removal of manganese-contamination in groundwater." Environmental Technology 40, no. 7: 878-887.
Heavy metals in soil can affect human health through the exposure pathways of oral ingestion, dermal contact, and inhalation. In this study, to assess the health risk of heavy metals in the agricultural area of Xinglonggang, 52 soil samples were collected and tested to obtain the concentrations of As, Cd, Cr, Cu, Ni, Pb, V, and Zn in the soil. The enrichment factor indicated that the heavy metals of the agricultural soils were enriched, but the degree of enrichment was mild for all of the heavy metals. Coefficient analysis and principal component analysis indicated that V, Cr, Ni, and Pb were mainly from natural sources, As was from irrigation, Cu and Cd tended to be from chemical fertilizers and pesticides, and Zn was from mixed sources including irrigation, chemical fertilizers, and pesticides. A human-health risk assessment indicated that the residents in the study area face high risk from carcinogens and low risk from noncarcinogens; As and Cr are the major heavy metals affecting human health. This study provides a reference and a basis for formulating effective measures to prevent and control heavy metal enrichment in agricultural soils.
Tiejun Song; Xiaosi Su; Jin He; Yukai Liang; Tao Zhou. Source apportionment and health risk assessment of heavy metals in agricultural soils in Xinglonggang, Northeastern China. Human and Ecological Risk Assessment: An International Journal 2017, 24, 509 -521.
AMA StyleTiejun Song, Xiaosi Su, Jin He, Yukai Liang, Tao Zhou. Source apportionment and health risk assessment of heavy metals in agricultural soils in Xinglonggang, Northeastern China. Human and Ecological Risk Assessment: An International Journal. 2017; 24 (2):509-521.
Chicago/Turabian StyleTiejun Song; Xiaosi Su; Jin He; Yukai Liang; Tao Zhou. 2017. "Source apportionment and health risk assessment of heavy metals in agricultural soils in Xinglonggang, Northeastern China." Human and Ecological Risk Assessment: An International Journal 24, no. 2: 509-521.
The groundwater flow path plays an important role in maintaining hydrological and ecological quality and security, which are important in the comprehensive management and use of both groundwater and surface water. In this study, an integrated multi-tracer-constrained framework was used to determine the groundwater flow path. The results show that there are shallow and deep flow paths in riverbank filtration, controlled by the different permeabilities of riverbed sediments and aquifers at different depths. The contribution of river water to shallow groundwater is less than that to deep groundwater because of the low permeability of the riverbed sediment in the dense muddy layer in the shallow slope of the river valley. This contribution decreases with increasing distance from the Liao River. The shallow groundwater quality is better than the deep groundwater quality because of its longer residence time.
Xiaosi Su; Shuai Lu; Ruimin Gao; Dong Su; Wenzhen Yuan; Zhenxue Dai; Eleftherios N. Papavasilopoulos. Groundwater flow path determination during riverbank filtration affected by groundwater exploitation: a case study of Liao River, Northeast China. Hydrological Sciences Journal 2017, 62, 2331 -2347.
AMA StyleXiaosi Su, Shuai Lu, Ruimin Gao, Dong Su, Wenzhen Yuan, Zhenxue Dai, Eleftherios N. Papavasilopoulos. Groundwater flow path determination during riverbank filtration affected by groundwater exploitation: a case study of Liao River, Northeast China. Hydrological Sciences Journal. 2017; 62 (14):2331-2347.
Chicago/Turabian StyleXiaosi Su; Shuai Lu; Ruimin Gao; Dong Su; Wenzhen Yuan; Zhenxue Dai; Eleftherios N. Papavasilopoulos. 2017. "Groundwater flow path determination during riverbank filtration affected by groundwater exploitation: a case study of Liao River, Northeast China." Hydrological Sciences Journal 62, no. 14: 2331-2347.
As one of the important elements of controlling the redox system within the hyporheic and hypolentic zone, sulfur is involved in a series of complex biogeochemical processes such as carbon cycle, water acidification, formation of iron and manganese minerals, redox processes of trace metal elements and a series of important ecological processes. Previous studies on biogeochemistry of the hyporheic and hypolentic zones mostly concentrated on nutrients of nitrogen and phosphorus, heavy metals and other pollutants. Systematic study of biogeochemical behavior of sulfur and its main controlling factors within the lake hypolentic zone is very urgent and important. In this paper, a typical desert plateau lake, Dakebo Lake in northwestern China, was taken for example within which redox zonation and biogeochemical characteristics of sulfur affected by hydrodynamic conditions were studied based on not only traditional hydrochemical analysis, but also environmental isotope evidence. In the lake hypolentic zone of the study area, due to the different hydrodynamic conditions, vertical profile of sulfur species and environmental parameters differ at the two sites of the lake (western side and center). Reduction of sulfate, deposition and oxidation of sulfide, dissolution and precipitation of sulfur-bearing minerals occurred are responded well to Eh, dissolved oxygen, pH, organic carbon and microorganism according to which the lake hypolentic zone can be divided into reduced zone containing H2S, reduced zone containing no H2S, transition zone and oxidized zone. The results of this study provide valuable insights for understanding sulfur conversion processes and sulfur biogeochemical zonation within a lake hypolentic zone in an extreme plateau arid environment and for protecting the lake-wetland ecosystem in arid and semiarid regions.
Xiaosi Su; Geng Cui; Huang Wang; Zhenxue Dai; Nam-Chil Woo; Wenzhen Yuan. Biogeochemical zonation of sulfur during the discharge of groundwater to lake in desert plateau (Dakebo Lake, NW China). Environmental Geochemistry and Health 2017, 40, 1051 -1066.
AMA StyleXiaosi Su, Geng Cui, Huang Wang, Zhenxue Dai, Nam-Chil Woo, Wenzhen Yuan. Biogeochemical zonation of sulfur during the discharge of groundwater to lake in desert plateau (Dakebo Lake, NW China). Environmental Geochemistry and Health. 2017; 40 (3):1051-1066.
Chicago/Turabian StyleXiaosi Su; Geng Cui; Huang Wang; Zhenxue Dai; Nam-Chil Woo; Wenzhen Yuan. 2017. "Biogeochemical zonation of sulfur during the discharge of groundwater to lake in desert plateau (Dakebo Lake, NW China)." Environmental Geochemistry and Health 40, no. 3: 1051-1066.
Petroleum hydrocarbon contamination of groundwater and soil constitutes a serious threat to human health and the natural environment. In situ biodegradation is a low-cost, low-risk and effective technique to remove petroleum hydrocarbon contaminants. The concentrations of total petroleum hydrocarbons (TPH), dissolved inorganic carbon (DIC) and \(^{14} {\text{C}}_{{{\text{HCO}}_{3} }}\) were analyzed, and polymerase chain reaction–denaturing gradient gel electrophoresis was used to investigate bacterial community structures. Downgradient from the contaminated source along the groundwater flow, the concentrations of TPH and DIC decreased and the 14C content increased from 44.3 to 64.3 pmc, which confirmed petroleum hydrocarbon biodegradation in the contaminated aquifers. The sequence analysis of the DGGE bands revealed that some species of known bacterial biodegrading strains, such as Dechloromonas aromatica RCB, Pseudomonas putida and Pseudomonas protegens, were the dominant bacterial groups in the field. Hydrogeochemical and stable isotope measurements, combined with analysis of bacterial community structures, could be useful tools to prove the occurrence of biodegradation processes in contaminated aquifers.
Hang Lv; Xueyu Lin; Xiaosi Su; Yuling Zhang. 14C Isotopes and microbial community structures as evidence for biodegradation in a petroleum hydrocarbon-contaminated aquifer. Environmental Earth Sciences 2016, 75, 1 -8.
AMA StyleHang Lv, Xueyu Lin, Xiaosi Su, Yuling Zhang. 14C Isotopes and microbial community structures as evidence for biodegradation in a petroleum hydrocarbon-contaminated aquifer. Environmental Earth Sciences. 2016; 75 (2):1-8.
Chicago/Turabian StyleHang Lv; Xueyu Lin; Xiaosi Su; Yuling Zhang. 2016. "14C Isotopes and microbial community structures as evidence for biodegradation in a petroleum hydrocarbon-contaminated aquifer." Environmental Earth Sciences 75, no. 2: 1-8.
Increased demand for water resources together with the influence of climate change has degraded water conditions which support vegetation in many parts of the world, especially in arid and semiarid areas. This study develops an integrated framework to assess the impact of precipitation and groundwater on vegetation growth in the Xiliao River Plain of northern China. The integrated framework systematically combines remote sensing technology with water flow modeling in the vadose zone and field data analysis. The vegetation growth is quantitatively evaluated with the remote sensing data by the normalized difference vegetation index (NDVI) and the simulated plant water uptake rates. The correlations among precipitation, groundwater depth and NDVI are investigated using Pearson correlation equations. The results provide insights for understanding interactions between precipitation and groundwater and their contributions to vegetation growth. Strong correlations between groundwater depth, plant water uptake and NDVI are found in parts of the study area during a ten-year drought period. The numerical modeling results indicate that there is an increased correlation between the groundwater depth and vegetation growth and that groundwater significantly contributes to sustaining effective soil moisture for vegetation growth during the long drought period. Therefore, a decreasing groundwater table might pose a great threat to the survival of vegetation during a long drought period.
Lin Zhu; Huili Gong; Zhenxue Dai; Tingbao Xu; Xiaosi Su. An integrated assessment of the impact of precipitation and groundwater on vegetation growth in arid and semiarid areas. Environmental Earth Sciences 2015, 74, 5009 -5021.
AMA StyleLin Zhu, Huili Gong, Zhenxue Dai, Tingbao Xu, Xiaosi Su. An integrated assessment of the impact of precipitation and groundwater on vegetation growth in arid and semiarid areas. Environmental Earth Sciences. 2015; 74 (6):5009-5021.
Chicago/Turabian StyleLin Zhu; Huili Gong; Zhenxue Dai; Tingbao Xu; Xiaosi Su. 2015. "An integrated assessment of the impact of precipitation and groundwater on vegetation growth in arid and semiarid areas." Environmental Earth Sciences 74, no. 6: 5009-5021.
The contamination of soil and groundwater by the accidental release of petroleum hydrocarbons is a common problem that affects drinking water supplies, and in situ biodegradation is a promising option for removing contaminants, with relatively low costs and minimal health risks. Total petroleum hydrocarbons (TPH), δ13C and 14C isotope ratios in dissolved inorganic carbon (DIC), and other geochemical indicators have been analyzed to demonstrate the effectiveness of in situ biodegradation at a contaminated site. The δ13C and 14C isotope ratios ranged from −5.4 to −18.4 ‰ and from 35.1 to 67 pmc, respectively. Some groundwater samples were contaminated with petroleum hydrocarbons with low 14C and δ13C contents, indicating the existence of microbial non-methanogenic biodegradation, whereas low 14C and high δ 13C contents were associated with the highest TPH concentrations, confirming that microbial methanogenic biodegradation occurred in these areas. Differences in the δ13C and 14C isotope ratios between monitoring wells in uncontaminated and contaminated areas suggest that the percentage of the DIC produced by methanogenic biodegradation decreased from 28.5–32.0 to 5.94–6.67 % along the flow direction, and became almost zero in downgradient areas and at the edge of the contamination plume.
Hang Lv; Yan Wang; Xiaosi Su; Yuling Zhang. Combined 14C and δ13C analysis of petroleum biodegradation in a shallow contaminated aquifer. Environmental Earth Sciences 2015, 74, 431 -438.
AMA StyleHang Lv, Yan Wang, Xiaosi Su, Yuling Zhang. Combined 14C and δ13C analysis of petroleum biodegradation in a shallow contaminated aquifer. Environmental Earth Sciences. 2015; 74 (1):431-438.
Chicago/Turabian StyleHang Lv; Yan Wang; Xiaosi Su; Yuling Zhang. 2015. "Combined 14C and δ13C analysis of petroleum biodegradation in a shallow contaminated aquifer." Environmental Earth Sciences 74, no. 1: 431-438.
Lanthanum-aluminum loaded hydrothermal palygorskite(La-Al-HP) composite was prepared and selected as adsorbent for the fluoride removal from simulated groundwater. The adsorbent was characterized by scanning electron microscopy(SEM), Brunauer-Emmet-Teller(BET) analysis, X-ray diffraction(XRD) analysis and X-ray photoelectron spectroscopy(XPS). SEM visualization shows that the dense surface structure of raw HP appeared loose and presented micro canals after modification. The BET analysis also proved the specific surface area of La-Al-HP composite(95.58 m2/g) was higher than that of the raw HP(34.31 m2/g). Subsequently, the adsorption capacity of La-Al-HP composite was demonstrated in adsorption experiments. The kinetics of fluoride ion adsorption into La-Al-HP composite followed the pseudo-second order with a correlation coefficient of 0.997. The isotherm data was well fitted with the Langmuir model. The monolayer adsorption capacity of La-Al-HP composite was 1.30 mg/g. The XRD and XPS results reveal that the La3+ and Al3+ ions were loaded on the surface of modified HP and the fluoride ion was adsorbed onto the La-Al-HP composite. A large amount of La-Al-O composite oxide existing on the surface of La-Al-HP composite might be the immanent cause for the excellent adsorption capacity of fluoride ions.
Shengyu Zhang; Ying Lu; Xueyu Lin; Yuling Zhang; Xiaosi Su. Performance and mechanisms of fluoride removal from groundwater by lanthanum-aluminum-loaded hydrothermal palygorskite composite. Chemical Research in Chinese Universities 2015, 31, 144 -148.
AMA StyleShengyu Zhang, Ying Lu, Xueyu Lin, Yuling Zhang, Xiaosi Su. Performance and mechanisms of fluoride removal from groundwater by lanthanum-aluminum-loaded hydrothermal palygorskite composite. Chemical Research in Chinese Universities. 2015; 31 (1):144-148.
Chicago/Turabian StyleShengyu Zhang; Ying Lu; Xueyu Lin; Yuling Zhang; Xiaosi Su. 2015. "Performance and mechanisms of fluoride removal from groundwater by lanthanum-aluminum-loaded hydrothermal palygorskite composite." Chemical Research in Chinese Universities 31, no. 1: 144-148.
High levels of nitrates in groundwater pose a risk to human health. In this study, we selected areas with typical agricultural nitrate pollution in northeast China as study sites. We then collected groundwater samples for nitrate nitrogen content analysis using the Four Step method developed by the United State Environmental Protection Agency (USEPA) in conjunction with the non-carcinogens health risk model (R = CDI/RfD) to determine the health risk associated with nitrate pollution of groundwater. The reference value of nitrates in drinking water was set at 10 mg/L (measured as nitrogen) and the intake reference dose of nitrate was set at 1.6 mg•kg−1•d−1 based on the EPA’s IRIS(Integrated Risk Information System). The water intake reference values were set at 2.3 L/d and 1.5 L/d based on the EPA values and actual values observed in the study area. The average exposure time was the ED (exposure duration) × 365d/a. Weights refer to the 2002 national urban and rural average weight of residents of different genders and different ages. Health hazard index calculation was based on the above information, and the index less than 1 is acceptable (U.S. EPA’s Risk Assessment Guide). Health risk assessment maps were then drawn by Arcgis software. The results indicated that agricultural sewage irrigation areas in the study area showed strong health risks, but that those of the city were relatively small. Moreover, the results indicated that children’s health risks are greater than those of adults.
Xiaosi Su; Huang Wang; Yuling Zhang. Health Risk Assessment of Nitrate Contamination in Groundwater: A Case Study of an Agricultural Area in Northeast China. Water Resources Management 2013, 27, 3025 -3034.
AMA StyleXiaosi Su, Huang Wang, Yuling Zhang. Health Risk Assessment of Nitrate Contamination in Groundwater: A Case Study of an Agricultural Area in Northeast China. Water Resources Management. 2013; 27 (8):3025-3034.
Chicago/Turabian StyleXiaosi Su; Huang Wang; Yuling Zhang. 2013. "Health Risk Assessment of Nitrate Contamination in Groundwater: A Case Study of an Agricultural Area in Northeast China." Water Resources Management 27, no. 8: 3025-3034.
Groundwater reservoir (GR) of both local precipitation and surplus water transferred from the Han River Basin is an effective method to prevent further lowering of the groundwater table. In this study, when the different volumes of infiltration water from the fuzzy mathematical analysis were input in the simulation, the rate at which the groundwater table rose ranged from 1.47 to 3.45 m/a. The effective storage rate (ESR) values of GR and the local reservoir was calculated, and ranged from 80.50 to 90.95% and from 49.66 to 80.90%, respectively. In GR, the ESR decreased as artificial recharge increased. Comparison of the ESR values between local reservoir and GR showed that if the volume of artificial recharge water available was < 7.86 × 108 m3/a, then GR was a better storage method than the local reservoir. According to our results, this situation would occur 80.30% of the time.
Shanghai Du; Xiaosi Su; Wenjing Zhang. Effective storage rates analysis of groundwater reservoir with surplus local and transferred water used in Shijiazhuang City, China. Water and Environment Journal 2012, 27, 157 -169.
AMA StyleShanghai Du, Xiaosi Su, Wenjing Zhang. Effective storage rates analysis of groundwater reservoir with surplus local and transferred water used in Shijiazhuang City, China. Water and Environment Journal. 2012; 27 (2):157-169.
Chicago/Turabian StyleShanghai Du; Xiaosi Su; Wenjing Zhang. 2012. "Effective storage rates analysis of groundwater reservoir with surplus local and transferred water used in Shijiazhuang City, China." Water and Environment Journal 27, no. 2: 157-169.