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The spatial assessments of water supply quality from wells, springs, and surface bodies were performed during the dry and rainy seasons in six municipalities in the eastern regions of Michoacán (Central Mexico). Different physicochemical parameters were used to determine the supplies’ Water Quality Index (WQI); all of the communities presented good quality. The analysis indicates that many water quality parameters were within limits set by the international standards, showing levels of “excellent and good quality” according to WQI, mainly during the dry season (except at San Pedro Jácuaro and Irimbo communities in the rainy season). However, some sites showed “poor quality” and “unsuitable drinking water” related to low pH levels ( 1) in the rainy season for three target groups. At the same time, the carcinogenic risk (1 × 10−3) exceeded the acceptability criterion in the rainy season, which suggests that the As mainly represents a threat to the health of adults, children, and infants.
Leonel Hernández-Mena; María Guadalupe Panduro-Rivera; José De Jesús Díaz-Torres; Valeria Ojeda-Castillo; Jorge del Real-Olvera; Malaquías López-Cervantes; Reyna Lizette Pacheco-Domínguez; Ofelia Morton-Bermea; Rogelio Santacruz-Benítez; Ramiro Vallejo-Rodríguez; Daryl Rafael Osuna-Laveaga; Erick R. Bandala; Valentín Flores-Payán. GIS, Multivariate Statistics Analysis and Health Risk Assessment of Water Supply Quality for Human Use in Central Mexico. Water 2021, 13, 2196 .
AMA StyleLeonel Hernández-Mena, María Guadalupe Panduro-Rivera, José De Jesús Díaz-Torres, Valeria Ojeda-Castillo, Jorge del Real-Olvera, Malaquías López-Cervantes, Reyna Lizette Pacheco-Domínguez, Ofelia Morton-Bermea, Rogelio Santacruz-Benítez, Ramiro Vallejo-Rodríguez, Daryl Rafael Osuna-Laveaga, Erick R. Bandala, Valentín Flores-Payán. GIS, Multivariate Statistics Analysis and Health Risk Assessment of Water Supply Quality for Human Use in Central Mexico. Water. 2021; 13 (16):2196.
Chicago/Turabian StyleLeonel Hernández-Mena; María Guadalupe Panduro-Rivera; José De Jesús Díaz-Torres; Valeria Ojeda-Castillo; Jorge del Real-Olvera; Malaquías López-Cervantes; Reyna Lizette Pacheco-Domínguez; Ofelia Morton-Bermea; Rogelio Santacruz-Benítez; Ramiro Vallejo-Rodríguez; Daryl Rafael Osuna-Laveaga; Erick R. Bandala; Valentín Flores-Payán. 2021. "GIS, Multivariate Statistics Analysis and Health Risk Assessment of Water Supply Quality for Human Use in Central Mexico." Water 13, no. 16: 2196.
In this study, the ability of the aerobic biogranulation process to remove organic matter, total nitrogen, and total phosphorous from wastewater was investigated. The effect of organic matter load on the quality of the produced biogranules and settling velocity of the generated biomass was also investigated. Four different aerobic scenarios were studied in sequential batch bioreactors (SBR) to identify the best operating conditions. The experimental setup consisted of four bioreactors containing 300 mL samples (100 mL of sludge and 200 mL of sweet whey at four different concentrations) under constant stirring (150 rpm), room temperature, and controlled pH (e.g., 7.98 ± 0.25). The different organic matter loads were calculated as the chemical oxygen demand (COD) concentration at 1157 (A), 719 (B), 357 (C), and 202 mg/L (D), respectively. The process consisted of cycles of initial feast followed by 72 h of famine. During the experiments, COD, total nitrogen (TN), and total phosphorus (TP) were measured at the beginning (t0) and the end of the process. The results confirmed that the best conditions were found in the bioreactor with the highest COD load (1157 mg/L), which achieved 98.7 % reduction in organic matter, 45.6 % reduction in TP, and 99.4 % reduction in TN after 9 days with final average sludge settling velocity of 0.7 m/h. The biogranulation process achieved improved clarification of the supernatant, showing increased settling velocity in all of the bioreactors. Microscopic observation confirmed uniform morphology (e.g., spherical or cylindrical) with the biggest biogranules being observed in bioreactors A and B. Organic load was found to play a significant role in biogranules formation and the achievement of the highest organic matter removal, sludge volume reduction, and water clarification. The overall trend in final sludge settling velocity measured in the different bioreactors was C > B > D > A, and in all of them settling was faster than the untreated sample. The results of this study confirm the high potential of biogranulation process for the treatment of wastewater with high organic matter content.
M.A. Gomez-Gallegos; R. Reyes-Mazzoco; D.X. Flores-Cervantes; Ayomi Jarayathne; Ashantha Goonetilleke; Erick R. Bandala; J.L. Sanchez-Salas. Role of organic matter, nitrogen and phosphorous on granulation and settling velocity in wastewater treatment. Journal of Water Process Engineering 2021, 40, 101967 .
AMA StyleM.A. Gomez-Gallegos, R. Reyes-Mazzoco, D.X. Flores-Cervantes, Ayomi Jarayathne, Ashantha Goonetilleke, Erick R. Bandala, J.L. Sanchez-Salas. Role of organic matter, nitrogen and phosphorous on granulation and settling velocity in wastewater treatment. Journal of Water Process Engineering. 2021; 40 ():101967.
Chicago/Turabian StyleM.A. Gomez-Gallegos; R. Reyes-Mazzoco; D.X. Flores-Cervantes; Ayomi Jarayathne; Ashantha Goonetilleke; Erick R. Bandala; J.L. Sanchez-Salas. 2021. "Role of organic matter, nitrogen and phosphorous on granulation and settling velocity in wastewater treatment." Journal of Water Process Engineering 40, no. : 101967.
In recent years, the presence of the group of contaminants, termed as microplastics (MPs) has been recognized as significant water pollutants with considerable potential for exerting adverse impacts on human health and wildlife. Natural attenuation has practically no effect while conventional treatment processes are not capable of entirely removing MPs which are reported to accumulate in the environment, in organisms in the aquatic food web and, potentially reaching humans. This in-depth review critically evaluates the state-of-the-art engineered technologies suitable for the separation and degradation of microplastics in water with potential for real-scale application. The outcomes of the review confirmed that very limited number of studies are reported in this field, the majority from recent years and have focused on using phase-changing processes, including coagulation-flocculation, flotation, and membrane processes. A few other studies have reported the use of chemical or biological digestion, and even fewer, engineered removal using biodegradation, wet oxidation, and advanced oxidation processes. This paper focuses on the type of MPs being removed, the process conditions and the outcomes reported in research literature. The emerging trends in the field are also highlighted as well as the identification of current knowledge gaps and future research directions along with perceptive comments and recommendations related to the application of available technologies for water treatment.
Oscar M. Rodríguez-Narvaez; Ashantha Goonetilleke; Leonidas Perez; Erick R. Bandala. Engineered technologies for the separation and degradation of microplastics in water: A review. Chemical Engineering Journal 2021, 414, 128692 .
AMA StyleOscar M. Rodríguez-Narvaez, Ashantha Goonetilleke, Leonidas Perez, Erick R. Bandala. Engineered technologies for the separation and degradation of microplastics in water: A review. Chemical Engineering Journal. 2021; 414 ():128692.
Chicago/Turabian StyleOscar M. Rodríguez-Narvaez; Ashantha Goonetilleke; Leonidas Perez; Erick R. Bandala. 2021. "Engineered technologies for the separation and degradation of microplastics in water: A review." Chemical Engineering Journal 414, no. : 128692.
With over 64.1 million cases worldwide (by December 1, 2020) and a death toll surpassing 1.48 million the COVID-19 pandemics has filled not only with fear and isolation our day-to-day lives but also with a significant amount of disinformation, the unreliability of data, and lack of trust on the response of governmental officers and authorities that, sadly, can be translated in loss of lives in our closest circles (colleagues, friends, family). At Air, Soil and Water Research (ASW), we believe that knowledge is the only way out of this and any other crisis faced by humankind, and our team has been working elbow-to-elbow (but online) to offer the best quality research and scientific knowledge that will certainly assist for better decision making and led towards the best path to get us through this so hard time.
Erick R Bandala; Jesus Rodrigo-Comino; Mohd Talib Latif. 2021: The New Normal and the Air, Soil and Water Research Perspective. Air, Soil and Water Research 2021, 14, 1 .
AMA StyleErick R Bandala, Jesus Rodrigo-Comino, Mohd Talib Latif. 2021: The New Normal and the Air, Soil and Water Research Perspective. Air, Soil and Water Research. 2021; 14 ():1.
Chicago/Turabian StyleErick R Bandala; Jesus Rodrigo-Comino; Mohd Talib Latif. 2021. "2021: The New Normal and the Air, Soil and Water Research Perspective." Air, Soil and Water Research 14, no. : 1.
The ability of biochar beads embedded with freshwater algae ̶ Chlorella pyrenoidosa (Bc-Cp beads) were investigated for their efficiency in the removal of pollutants. Combining these is an innovative concept which can result in improvements in pollutant removal since both, biochar and algae have the ability for adsorbing/absorbing pollutants. Additionally, only limited work on embedding freshwater algae (common algae existing in surface water and having low ecological risks since they are native species) into biochar for the removal of water pollutants has been undertaken to-date. It was found that Bc-Cp beads prepared using 10 mL of algae (9 × 108 cell/mL), 0.3 g of biochar, 40 g/L of sodium alginate, and 20 g/L of CaCl2 displayed the optimum characteristics including mechanical strength (2.548 N), promotion of algae growth (191.70 % growth rate) and pollutant removal ability with the removal efficiency of ammonia nitrogen, total nitrogen and total phosphorus, total organic carbon, zinc and copper were up to 69.2 %, 43.0 %, 73.8 %, 81.0 %, 74.4 % and 81.0 %, respectively. The algae within the beads were primarily responsible for the removal of nutrients by assimilation, while biochar mainly exerted influence on the removal of organic matter and heavy metals by chemisorption. The study outcomes also confirmed that Bc-Cp beads possess high potential to be used in estuarine environments and saline groundwater.
Qicong Guo; Erick R. Bandala; Ashantha Goonetilleke; Nian Hong; Yuqing Li; An Liu. Application of Chlorella pyrenoidosa embedded biochar beads for water treatment. Journal of Water Process Engineering 2021, 40, 101892 .
AMA StyleQicong Guo, Erick R. Bandala, Ashantha Goonetilleke, Nian Hong, Yuqing Li, An Liu. Application of Chlorella pyrenoidosa embedded biochar beads for water treatment. Journal of Water Process Engineering. 2021; 40 ():101892.
Chicago/Turabian StyleQicong Guo; Erick R. Bandala; Ashantha Goonetilleke; Nian Hong; Yuqing Li; An Liu. 2021. "Application of Chlorella pyrenoidosa embedded biochar beads for water treatment." Journal of Water Process Engineering 40, no. : 101892.
Water scarcity, which is exacerbated by climate change, is a major challenge to ensure human well-being. Therefore, it is equally important to protect conventional water resources from degradation and at the same time to identify cost-effective alternatives with a low carbon footprint. In this regard, stormwater plays a key role as it is a largely underutilised resource for both potable and non-potable use. However, stormwater carries substantial loads of pollutants to receiving waters such as rivers. Unfortunately, the lack of comprehensive stormwater quality modelling strategies, which account for the effects of climate change, constrains the formulation of effective measures to improve the quality of stormwater. Currently, there is a significant knowledge gap in the merging of stormwater quality modelling and climate modelling. This paper critically reviews current stormwater quality modelling approaches (quantity and quality) and the role of climate modelling outputs in stormwater quality modelling. This is followed by the presentation of a robust framework to integrate the impacts of climate change with stormwater quality models.
Buddhi Wijesiri; Erick Bandala; An Liu; Ashantha Goonetilleke. A Framework for Stormwater Quality Modelling under the Effects of Climate Change to Enhance Reuse. Sustainability 2020, 12, 10463 .
AMA StyleBuddhi Wijesiri, Erick Bandala, An Liu, Ashantha Goonetilleke. A Framework for Stormwater Quality Modelling under the Effects of Climate Change to Enhance Reuse. Sustainability. 2020; 12 (24):10463.
Chicago/Turabian StyleBuddhi Wijesiri; Erick Bandala; An Liu; Ashantha Goonetilleke. 2020. "A Framework for Stormwater Quality Modelling under the Effects of Climate Change to Enhance Reuse." Sustainability 12, no. 24: 10463.
Iron-containing zeolites were prepared using two-step postsynthesis and wet impregnation methods and characterized using conventional techniques. The materials were tested for production of hydroxyl radicals using N,N-dimethyl-p-nitrosoaniline (pNDA) as radical scavenger and discoloration of Congo Red (CR) using advanced oxidation processes (AOPs). The characterization showed that the materials were morphologically homogeneous and had different iron amounts incorporated into the framework and extra-framework of the BEA structure. The pNDA bleaching curves suggested that FexHAlBEA is more effective for producing hydroxyl radicals because of the presence of higher amounts of octahedral Fe(III) in the extra-framework positions. A similar trend was found for CR discoloration. The use of hydrogen peroxide increased both hydroxyl radical generation and CR discoloration, which suggests that the Fe in the zeolites decomposed the oxidant and increased the production of free radicals. Fe-containing zeolites were found as interesting catalysts for AOPs to remove organic contaminants in water.
Erick R. Bandala; Renata Sadek; Jacek Gurgul; Kazimierz Łątka; Małgorzata Zimowska; Laetitia Valentin; Oscar M. Rodriguez-Narvaez; Stanislaw Dzwigaj. Assessment of the capability of Fe and Al modified BEA zeolites to promote advanced oxidation processes in aqueous phase. Chemical Engineering Journal 2020, 409, 127379 .
AMA StyleErick R. Bandala, Renata Sadek, Jacek Gurgul, Kazimierz Łątka, Małgorzata Zimowska, Laetitia Valentin, Oscar M. Rodriguez-Narvaez, Stanislaw Dzwigaj. Assessment of the capability of Fe and Al modified BEA zeolites to promote advanced oxidation processes in aqueous phase. Chemical Engineering Journal. 2020; 409 ():127379.
Chicago/Turabian StyleErick R. Bandala; Renata Sadek; Jacek Gurgul; Kazimierz Łątka; Małgorzata Zimowska; Laetitia Valentin; Oscar M. Rodriguez-Narvaez; Stanislaw Dzwigaj. 2020. "Assessment of the capability of Fe and Al modified BEA zeolites to promote advanced oxidation processes in aqueous phase." Chemical Engineering Journal 409, no. : 127379.
This paper provides a review of the state-of-the-art processes to generate biogenic NMs and their characterization, and an analysis of their use in the photocatalytic degradation of organic contaminants and inactivation of pathogens in water.
Erick R. Bandala; Danijiela Stanisic; Ljubica Tasic. Biogenic nanomaterials for photocatalytic degradation and water disinfection: a review. Environmental Science: Water Research & Technology 2020, 6, 3195 -3213.
AMA StyleErick R. Bandala, Danijiela Stanisic, Ljubica Tasic. Biogenic nanomaterials for photocatalytic degradation and water disinfection: a review. Environmental Science: Water Research & Technology. 2020; 6 (12):3195-3213.
Chicago/Turabian StyleErick R. Bandala; Danijiela Stanisic; Ljubica Tasic. 2020. "Biogenic nanomaterials for photocatalytic degradation and water disinfection: a review." Environmental Science: Water Research & Technology 6, no. 12: 3195-3213.
This study investigated the removal of Acetaminophen (ACT) using biochars having different physicochemical characteristics. Biochars subjected to post-pyrolysis heat-treatment at 300°C for different treatment times (0, 3.5, 8 and 24 h) were used. The resulting biochars were characterized using FTIR and X-ray diffraction spectroscopy. Experiments for ACT adsorption with different biochars loads (0.0, 0.05, 1, and 2 g L-1) were performed. Using the best performing material, ACT adsorption was investigated for additional biochar loads (4.0, and 6.0 g L-1) and experiments to test the effect of ionic strength were undertaken for different ions (chloride, carbonate, and nitrate) at three different concentrations (0.0, 1.0, 5.0 mM). The results showed that the changes to the surface of the thermally treated biochars increased the adsorption of ACT. The changes in the amount of oxygen-containing functional groups on the surface of the modified biochars (e.g., C=O from 47.8 a.u. to 152 a.u. in the untreated and thermally treated biochars, respectively), as well as modifications to their crystalline structure are considered to be the reason for the observed improvement. Adsorption isotherm and kinetic models suggest the generation of an adsorbate monolayer and chemisorption as the rate-limiting step. The different anions tested were found to have a significant influence on ACT adsorption, related to their electronegativity and steric effect, as confirmed by the multivariate analysis.
Adam M. Clurman; Oscar M. Rodríguez-Narvaez; Ayomi Jayarathne; Gehan De Silva; Mahinda Ranasinghe; Ashantha Goonetilleke; Erick R. Bandala. Influence of surface hydrophobicity/hydrophilicity of biochar on the removal of emerging contaminants. Chemical Engineering Journal 2020, 402, 126277 .
AMA StyleAdam M. Clurman, Oscar M. Rodríguez-Narvaez, Ayomi Jayarathne, Gehan De Silva, Mahinda Ranasinghe, Ashantha Goonetilleke, Erick R. Bandala. Influence of surface hydrophobicity/hydrophilicity of biochar on the removal of emerging contaminants. Chemical Engineering Journal. 2020; 402 ():126277.
Chicago/Turabian StyleAdam M. Clurman; Oscar M. Rodríguez-Narvaez; Ayomi Jayarathne; Gehan De Silva; Mahinda Ranasinghe; Ashantha Goonetilleke; Erick R. Bandala. 2020. "Influence of surface hydrophobicity/hydrophilicity of biochar on the removal of emerging contaminants." Chemical Engineering Journal 402, no. : 126277.
Immobilizing nanomaterials in highly porous, surface active, structurally stable, natural and synthetic silica-based materials have been reported to produce new composites with exceptional contaminant adsorption and/or catalytic degradation capabilities that are suitable for removing organic contaminants in water. Despite their potential benefits, these novel materials have not been exhaustively tested for their removal of antibiotics in an aqueous phase, and therefore their capability to eliminate such undesirable contaminants from the environment is unknown. This review paper analyzes the key physical and chemical characteristics of different natural and synthetic silica-based nanomaterial composites used to remove antibiotics from the aqueous phase and their performance in such environmental applications, as well as identifies current knowledge gaps and potential directions for further research and development.
Ahdee B. Zeidman; Oscar Rodriguez; Jaeyun Moon; Erick R. Bandala. Removal of antibiotics in aqueous phase using silica-based immobilized nanomaterials: A review. Environmental Technology & Innovation 2020, 20, 101030 .
AMA StyleAhdee B. Zeidman, Oscar Rodriguez, Jaeyun Moon, Erick R. Bandala. Removal of antibiotics in aqueous phase using silica-based immobilized nanomaterials: A review. Environmental Technology & Innovation. 2020; 20 ():101030.
Chicago/Turabian StyleAhdee B. Zeidman; Oscar Rodriguez; Jaeyun Moon; Erick R. Bandala. 2020. "Removal of antibiotics in aqueous phase using silica-based immobilized nanomaterials: A review." Environmental Technology & Innovation 20, no. : 101030.
In this study, electro-oxidation (EOx) and in situ generation of ferrate ions [Fe(VI)] were tested to treat water contaminated with Blue BR dye (BBR) using a boron-doped diamond (BDD) anode. Two electrolytic media (0.1 M HClO4 and 0.05 M Na2SO4) were evaluated for the BDD, which simultaneously produced oxygen radicals (•OH) and [Fe(VI)]. The generation of [Fe(VI)] was characterized by cyclic voltammetry (CV) and the effect of different current intensity values (e.g., 7 mA cm-2, 15 mA cm-2, and 30 mA cm-2) was assessed during BBR degradation tests. The discoloration of BBR was followed by UV-Vis spectrophotometry. When the EOx process was used alone, only 78% BBR discoloration was achieved. The best electrochemical discoloration conditions were found using 0.05 M Na2SO4 and 30 mA cm-2. Using these conditions, overall BBR discoloration values up to 98%, 95%, and 87% with 12 mM, 6 mM, and 1 mM of FeSO4, respectively, were achieved. In the case of chemical oxygen demand (COD) reduction, the EOx process showed only a 37% COD reduction, whereas combining [Fe(VI)] generation using 12 mM of FeSO4 achieved an up to 61% COD reduction after 90 minutes. The evolution of reaction byproducts (oxalic acid) was performed using liquid chromatography analysis.
Mauricio Chiliquinga; Patricio J. Espinoza-Montero; Oscar Rodríguez; Alain R. Picos-Benítez; Erick R. Bandala; S. Gutiérrez-Granados; Juan M. Peralta-Hernández. Simultaneous Electrochemical Generation of Ferrate and Oxygen Radicals to Blue BR Dye Degradation. Processes 2020, 8, 753 .
AMA StyleMauricio Chiliquinga, Patricio J. Espinoza-Montero, Oscar Rodríguez, Alain R. Picos-Benítez, Erick R. Bandala, S. Gutiérrez-Granados, Juan M. Peralta-Hernández. Simultaneous Electrochemical Generation of Ferrate and Oxygen Radicals to Blue BR Dye Degradation. Processes. 2020; 8 (7):753.
Chicago/Turabian StyleMauricio Chiliquinga; Patricio J. Espinoza-Montero; Oscar Rodríguez; Alain R. Picos-Benítez; Erick R. Bandala; S. Gutiérrez-Granados; Juan M. Peralta-Hernández. 2020. "Simultaneous Electrochemical Generation of Ferrate and Oxygen Radicals to Blue BR Dye Degradation." Processes 8, no. 7: 753.
Moringa oleifera (MO) seed extract coupled with electrocoagulation (EC) was used to remove fluoride from water. Different MO extract volumes (5, 12.5, and 25 mL of MO extract per water liter) were coupled with EC, using aluminum electrodes at different current density values (J = 0.7, 2, and 3.3 mA cm‐2) and different electrode separations (1, 2, and 4 cm), tested in batch and recirculation experiments. Control experiments using MO extract and EC alone achieved 5% and 54% water defluoridation, respectively. Best experimental batch conditions were achieved using 12.5 mL of MO extract followed by EC (3.3 mA cm‐2) with a 1 cm electrode separation, producing > 90% fluoride removal. Recirculation experiments with the EC reactor were performed with DI water and tap water using 1 cm electrode separation, 12.5 mL of MO extract and different current densities. More than 90% fluoride removal was achieved with the EC/MO process, using 3.3 mA cm‐2, in both DI and tap water after 30 and 60 minutes, respectively. An energy consumption index (ECI) was developed, which showed that 1.51 and 0.67 W h‐1 mg‐1 were achieved for batch experiments of EC alone and EC/MO extract, respectively. For EC/MO extract, recirculation experiments with tap and DI water resulted in 0.35 and 0.22 W h‐1 mg‐1, respectively. A cost analysis showed that $0.18 will be needed to treat one cubic meter of water. This article is protected by copyright. All rights reserved.
Brent Laney; Oscar Rodriguez; Braimah Apambire; Erick R. Bandala. Water Defluoridation Using Sequentially Coupled Moringa oleifera Seed Extract and Electrocoagulation. Groundwater Monitoring & Remediation 2020, 40, 1 .
AMA StyleBrent Laney, Oscar Rodriguez, Braimah Apambire, Erick R. Bandala. Water Defluoridation Using Sequentially Coupled Moringa oleifera Seed Extract and Electrocoagulation. Groundwater Monitoring & Remediation. 2020; 40 (3):1.
Chicago/Turabian StyleBrent Laney; Oscar Rodriguez; Braimah Apambire; Erick R. Bandala. 2020. "Water Defluoridation Using Sequentially Coupled Moringa oleifera Seed Extract and Electrocoagulation." Groundwater Monitoring & Remediation 40, no. 3: 1.
Peroxymonosulfate (PMS) decomposition, hydroxyl radical (•OH) generation, and acetaminophen (ACT) degradation by the Co/PMS system using homogeneous (dissolved cobalt) and heterogeneous (suspended Co3O4) cobalt were assessed. For the homogeneous process, >99% PMS decomposition was observed and 10 mmol/L of •OH generation was produced using 5 mmol/L of PMS and different dissolved cobalt concentrations after 30 min. A dissolved cobalt concentration of 0.2 mmol/L was used to achieve >99% ACT degradation using the homogeneous process. For the heterogeneous process, 60% PMS decomposition and negligible •OH generation were observed for 5 mmol/L of the initial PMS concentration using 0.1 and 0.2 g/L of Co3O4. Degradation of ACT greater than 80% was achieved for all experimental runs using 5 mmol/L of the initial PMS concentration independently of the initial Co3O4 load used. For the heterogeneous process, the best experimental conditions for ACT degradation were found to be 3 mmol/L of PMS and 0.2 g/L of Co3O4, for which >99% ACT degradation was achieved after 10 min. Because negligible •OH was produced by the Co3O4/PMS process, a second-order kinetic model was proposed for sulfur-based free radical production to allow fair comparison between homogeneous and heterogeneous processes. Using the kinetic data and the reaction by-products identified, a mechanistic pathway for ACT degradation is suggested.
Oscar M. Rodríguez-Narvaez; Ruwini Rajapaksha; Mahinda I. Ranasinghe; Xuelian Bai; Juan Manuel Peralta-Hernández; Erick R. Bandala. Peroxymonosulfate decomposition by homogeneous and heterogeneous Co: Kinetics and application for the degradation of acetaminophen. Journal of Environmental Sciences 2020, 93, 30 -40.
AMA StyleOscar M. Rodríguez-Narvaez, Ruwini Rajapaksha, Mahinda I. Ranasinghe, Xuelian Bai, Juan Manuel Peralta-Hernández, Erick R. Bandala. Peroxymonosulfate decomposition by homogeneous and heterogeneous Co: Kinetics and application for the degradation of acetaminophen. Journal of Environmental Sciences. 2020; 93 ():30-40.
Chicago/Turabian StyleOscar M. Rodríguez-Narvaez; Ruwini Rajapaksha; Mahinda I. Ranasinghe; Xuelian Bai; Juan Manuel Peralta-Hernández; Erick R. Bandala. 2020. "Peroxymonosulfate decomposition by homogeneous and heterogeneous Co: Kinetics and application for the degradation of acetaminophen." Journal of Environmental Sciences 93, no. : 30-40.
This study evaluated the performance of a sequentially coupled UV/H2O2-anoxic system to treat industrial wastewater (IWW). Initial IWW characterization showed a high chemical oxygen demand (COD) load (13,261 mg L−1, 6,880 mg L−1 of total organic carbon (TOC), 569 mg L−1 of total nitrogen (TN), and an alkaline pH (9.1 ± 1.51). Using advanced oxidation processes (AOPs), removal efficiencies of 49.4 % of COD and 85 % of total organic carbon (TOC) were achieved after 60 min of UV-C irradiation (82 W m−2) using a H2O2/COD ratio of 0.78:1. Under these conditions, a 50 % transformation of TN into nitrites and nitrates (NO2+NO3)-N was also observed. After the AOP, the partially treated IWW was mixed with municipal wastewater (MWW) at ratio of 1:10, based on toxicity test results, and then used as the influent of the biological process. The biological process consisted of anoxic suspended and attached biomass coupled sequentially after the UV/H2O2 system. Both biological systems (attached and suspended biomass reactors) efficiently removed (NO2+NO3)-N, achieving 85 % removal of TN, 41.8 % removal of TOC, and 49.2 % removal of COD and denitrification process was found to occur after the AOP through the biological systems. In addition, pH values ranging from 6 to 7.6 were observed after the biological treatment, which suggests that the resulting effluent could be treated using conventional water treatment.
Alejandro David Ortiz Marín; L.E. Amabilis-Sosa; E.R. Bandala; R.A. Guillén-Garcés; L.G. Treviño-Quintanilla; A. Roé-Sosa; G.E. Moeller-Chávez. Using sequentially coupled UV/H2O2-biologic systems to treat industrial wastewater with high carbon and nitrogen contents. Process Safety and Environmental Protection 2020, 137, 192 -199.
AMA StyleAlejandro David Ortiz Marín, L.E. Amabilis-Sosa, E.R. Bandala, R.A. Guillén-Garcés, L.G. Treviño-Quintanilla, A. Roé-Sosa, G.E. Moeller-Chávez. Using sequentially coupled UV/H2O2-biologic systems to treat industrial wastewater with high carbon and nitrogen contents. Process Safety and Environmental Protection. 2020; 137 ():192-199.
Chicago/Turabian StyleAlejandro David Ortiz Marín; L.E. Amabilis-Sosa; E.R. Bandala; R.A. Guillén-Garcés; L.G. Treviño-Quintanilla; A. Roé-Sosa; G.E. Moeller-Chávez. 2020. "Using sequentially coupled UV/H2O2-biologic systems to treat industrial wastewater with high carbon and nitrogen contents." Process Safety and Environmental Protection 137, no. : 192-199.
Mohd Talib Latif; Erick R Bandala; Jesús Rodrigo-Comino. A New Decade in Air, Soil and Water Research: New Challenges and Environmental Issues to Be Discussed. Air, Soil and Water Research 2020, 13, 1 .
AMA StyleMohd Talib Latif, Erick R Bandala, Jesús Rodrigo-Comino. A New Decade in Air, Soil and Water Research: New Challenges and Environmental Issues to Be Discussed. Air, Soil and Water Research. 2020; 13 ():1.
Chicago/Turabian StyleMohd Talib Latif; Erick R Bandala; Jesús Rodrigo-Comino. 2020. "A New Decade in Air, Soil and Water Research: New Challenges and Environmental Issues to Be Discussed." Air, Soil and Water Research 13, no. : 1.
Use of p-nitroso dimethylaniline (pNDA) as a selective hydroxyl radical (OH) probe compound has been extensively reported in the literature for evaluating the performance of the catalysts used in Advanced Oxidation Processes (AOPs). Some recent studies speculated that pNDA might be oxidized by other oxidizing species, and might also be directly reduced. This study, for the first time, investigates pNDA bleaching mechanism by an Fe0-containing composite, capable of causing both reduction and Fenton-like oxidation. The composite consisted of Santa Barbara-15 (SBA-15) mesoporous silica as the supporting medium for nZVI immobilization (nZVI/SBA-15). The quantity of iron in the composite was optimized by synthesizing four various nZVI/SBA-15 samples with different iron to silica weight ratios and comparing their pNDA bleaching efficiency. Kinetic studies showed a pseudo-second-order model for pNDA bleaching using all nZVI/SBA-15 samples. The effects of OH scavengers and dissolved oxygen concentration on pNDA bleaching rate were examined. FTIR analysis of pNDA solutions showed different molecular structures for pNDA bleached under different DO conditions, leading to the conclusion that pNDA is susceptible to reductive bleaching. Results demonstrated that when using pNDA as a probe for free radicals’ generation assessment, the reductive potential of the catalysts needs to be considered.
Soroosh Mortazavian; Erick R. Bandala; Jee-Hwan Bae; Dongwon Chun; Jaeyun Moon. Assessment of p-nitroso dimethylaniline (pNDA) suitability as a hydroxyl radical probe: Investigating bleaching mechanism using immobilized zero-valent iron nanoparticles. Chemical Engineering Journal 2019, 385, 123748 .
AMA StyleSoroosh Mortazavian, Erick R. Bandala, Jee-Hwan Bae, Dongwon Chun, Jaeyun Moon. Assessment of p-nitroso dimethylaniline (pNDA) suitability as a hydroxyl radical probe: Investigating bleaching mechanism using immobilized zero-valent iron nanoparticles. Chemical Engineering Journal. 2019; 385 ():123748.
Chicago/Turabian StyleSoroosh Mortazavian; Erick R. Bandala; Jee-Hwan Bae; Dongwon Chun; Jaeyun Moon. 2019. "Assessment of p-nitroso dimethylaniline (pNDA) suitability as a hydroxyl radical probe: Investigating bleaching mechanism using immobilized zero-valent iron nanoparticles." Chemical Engineering Journal 385, no. : 123748.
Immobilizing nanomaterials in highly porous, surface active, structurally stable biochar creates novel nanocomposites that combines the well-known advantages of both materials. The exceptional contaminant adsorption and/or catalytic degradation capabilities of these nanocomposites have attracted the attention of the scientific community for possible use in environmental applications. This paper reviews the different methodologies for synthesizing biochar-supported nanomaterials, the key physical and chemical characteristics of these nanomaterials, and their performance in environmental applications, as well as identifies current knowledge gaps and potential directions for further research and development.
Oscar M. Rodriguez-Narvaez; Juan Manuel Peralta-Hernandez; Ashantha Goonetilleke; Erick R. Bandala. Biochar-supported nanomaterials for environmental applications. Journal of Industrial and Engineering Chemistry 2019, 78, 21 -33.
AMA StyleOscar M. Rodriguez-Narvaez, Juan Manuel Peralta-Hernandez, Ashantha Goonetilleke, Erick R. Bandala. Biochar-supported nanomaterials for environmental applications. Journal of Industrial and Engineering Chemistry. 2019; 78 ():21-33.
Chicago/Turabian StyleOscar M. Rodriguez-Narvaez; Juan Manuel Peralta-Hernandez; Ashantha Goonetilleke; Erick R. Bandala. 2019. "Biochar-supported nanomaterials for environmental applications." Journal of Industrial and Engineering Chemistry 78, no. : 21-33.
A water quality study was carried out at the Adolfo López Mateos (ALM) reservoir, one of the largest tropical reservoirs in Mexico, located within an intensive agricultural region. In this study, the seasonal and spatial variations of nine water quality parameters were evaluated at four different sites along the reservoir semiannually over a period of seven years (2012–2018), considering the spring (dry) and fall (rainy) seasons. An analysis of variance was performed to compare the mean values of the water quality parameters for the different sampling sites. Then, a multiparametric classification analysis was carried out to estimate the spatial density of the sampling points by using a probabilistic neural network (PNN) classifier. The observations (seasonal and spatial) of the water quality parameters at the ALM reservoir revealed no significant influence. The trophic status was evaluated using the Carlson Modified Trophic State Index, finding the trophic state of the reservoir at the mesotrophic level, with nitrogen being the limiting nutrient. The PNN revealed neural interactions between total suspended solids (TSS) and the other four parameters, indicating that the concentration ranges of five parameters are equally distributed and classified.
Alberto Quevedo-Castro; Erick R. Bandala; Jesus Gabriel Rangel-Peraza; Leonel E. Amábilis-Sosa; Antonio Sanhouse-García; Yaneth A. Bustos-Terrones. Temporal and Spatial Study of Water Quality and Trophic Evaluation of a Large Tropical Reservoir. Environments 2019, 6, 61 .
AMA StyleAlberto Quevedo-Castro, Erick R. Bandala, Jesus Gabriel Rangel-Peraza, Leonel E. Amábilis-Sosa, Antonio Sanhouse-García, Yaneth A. Bustos-Terrones. Temporal and Spatial Study of Water Quality and Trophic Evaluation of a Large Tropical Reservoir. Environments. 2019; 6 (6):61.
Chicago/Turabian StyleAlberto Quevedo-Castro; Erick R. Bandala; Jesus Gabriel Rangel-Peraza; Leonel E. Amábilis-Sosa; Antonio Sanhouse-García; Yaneth A. Bustos-Terrones. 2019. "Temporal and Spatial Study of Water Quality and Trophic Evaluation of a Large Tropical Reservoir." Environments 6, no. 6: 61.
Hourly temperature and dew point from Las Vegas were collected and used to estimate the heat index and excess heat factor. The indices were used with data of heat-related deaths to assess the effect of extreme heat on the population. The trends of the heat indices were analyzed for 2007–2016, and the correlation between heat wave episodes and the number of heat-related deaths was estimated. Both indices showed a clear increase over the last ten years in the severity and number of heat wave events per year. The number of heat wave episodes increased, while their duration decreased. The number of heat-related deaths was also found to increase, with 2016 having the highest number of heat-related deaths. For the period, 437 heat-related deaths were registered in Las Vegas. The most vulnerable subpopulation was people over 50 years old, for which 76% of the heat-related deaths were associated with preexisting heart disease.
E. R. Bandala; K. Kebede; N. Jonsson; R. Murray; D. Green; J. F. Mejia; P. F. Martinez-Austria. Extreme heat and mortality rates in Las Vegas, Nevada: inter-annual variations and thresholds. International Journal of Environmental Science and Technology 2019, 16, 7175 -7186.
AMA StyleE. R. Bandala, K. Kebede, N. Jonsson, R. Murray, D. Green, J. F. Mejia, P. F. Martinez-Austria. Extreme heat and mortality rates in Las Vegas, Nevada: inter-annual variations and thresholds. International Journal of Environmental Science and Technology. 2019; 16 (11):7175-7186.
Chicago/Turabian StyleE. R. Bandala; K. Kebede; N. Jonsson; R. Murray; D. Green; J. F. Mejia; P. F. Martinez-Austria. 2019. "Extreme heat and mortality rates in Las Vegas, Nevada: inter-annual variations and thresholds." International Journal of Environmental Science and Technology 16, no. 11: 7175-7186.
Biochar (BC) is an inexpensive and widely available carbon-based material with a variety of applications. Zero valent iron nanoparticles (nZVI), on the other hand, are highly reactive species. However, agglomeration and difficulty of separation from the treated media are the major reported drawbacks associated with nZVI application for water treatment. In this study, BC was modified by a simple heat-treatment, producing hydrophilic heat-treated biochar (HBC) with enhanced absorptive features, and was impregnated with nZVI, producing BC/nZVI composite for efficient organic contaminant removal. Synthesis conditions of BC/nZVI composite were optimized by evaluating p-nitrosodimethylaniline (pNDA) bleaching efficiency of various BC/nZVI samples synthesized under different conditions of pH, ultrasonication amplitude, and iron concentration. Variously-synthesized HBCs were then used to synthesize HBC/nZVI composites, and were characterized for surface morphology, surface chemistry, and elemental composition. The best-performing HBC/nZVI for pNDA bleaching was then used for trichloroethylene (TCE) removal from water. Using HBC/nZVI or BC/nZVI composites, the pseudo-second order model fit indicated a chemisorption mechanism for organic contaminants removal. Using 250 mg L−1 of the best-performing HBC/nZVI, an 88% TCE reduction (initial concentration of 40 μg L−1) was achieved after 20 min at pH = 3.0, with a rate of 3.318 g mg−1 min−1.
Soroosh Mortazavian; Tammy Jones-Lepp; Jee-Hwan Bae; Dongwon Chun; Erick R. Bandala; Jaeyun Moon. Heat-treated biochar impregnated with zero-valent iron nanoparticles for organic contaminants removal from aqueous phase: Material characterizations and kinetic studies. Journal of Industrial and Engineering Chemistry 2019, 76, 197 -214.
AMA StyleSoroosh Mortazavian, Tammy Jones-Lepp, Jee-Hwan Bae, Dongwon Chun, Erick R. Bandala, Jaeyun Moon. Heat-treated biochar impregnated with zero-valent iron nanoparticles for organic contaminants removal from aqueous phase: Material characterizations and kinetic studies. Journal of Industrial and Engineering Chemistry. 2019; 76 ():197-214.
Chicago/Turabian StyleSoroosh Mortazavian; Tammy Jones-Lepp; Jee-Hwan Bae; Dongwon Chun; Erick R. Bandala; Jaeyun Moon. 2019. "Heat-treated biochar impregnated with zero-valent iron nanoparticles for organic contaminants removal from aqueous phase: Material characterizations and kinetic studies." Journal of Industrial and Engineering Chemistry 76, no. : 197-214.