Christopher B. Yazzie, Catalina Elias, Vasiliki Karanikola
Nanofiltration (NF) can be used as a low-energy pressure-driven membrane treatment process with potential applications in mitigating uranium contamination from groundwater. Uranium can interact with groundwater minerals which can influence NF uranium rejection. This study used two commercially available membranes (NF90 and NF270) to remove uranyl complexes in the presence of environmentally relevant cations (Na+, Mg2+, and Ca2+). The analysis includes extensive membrane characterization, calculating NF treatment performance, investigating uranium adsorption to the functionalized polyamide top layer of the membrane, and determining membrane selectivity. Under batch experiments, using environmentally relevant ion concentrations, we measured uranium rejection rates for the NF90 between 58–99% and NF270 between 4–98%. The mechanisms of low uranium rejection are not only explained by steric hindrance but also by the reduction of the Donnan exclusion mechanism, which originates from the decrease in membrane charge density caused by the addition of mono- and divalent ions. Additionally, exclusion mechanisms were observed to be directly influenced by solution pH, which governs the variation in uranyl complexation type and membrane charge. Calcium has a complexation affinity to uranium with broad implications in uranyl-complex molecular weight, valance, and molecular shape, all of which can influence water treatment efficiency. Lastly, both membranes were evaluated based on their membrane selectivity, the ratio of cation fluxes to uranium(VI) ion flux. Ideal membrane selectivity occurred at pH 7. Na+ to uranium(VI) ion ratio was 190 for NF90 and 100 for NF270. The results of this study advance the understanding of using NF membranes for groundwater uranium removal.
{"title":"Uranium rejection with nanofiltration membranes and the influence of environmentally relevant mono- and divalent cations at various pH","authors":"Christopher B. Yazzie, Catalina Elias, Vasiliki Karanikola","doi":"10.1039/d4ew00324a","DOIUrl":"https://doi.org/10.1039/d4ew00324a","url":null,"abstract":"Nanofiltration (NF) can be used as a low-energy pressure-driven membrane treatment process with potential applications in mitigating uranium contamination from groundwater. Uranium can interact with groundwater minerals which can influence NF uranium rejection. This study used two commercially available membranes (NF90 and NF270) to remove uranyl complexes in the presence of environmentally relevant cations (Na<small><sup>+</sup></small>, Mg<small><sup>2+</sup></small>, and Ca<small><sup>2+</sup></small>). The analysis includes extensive membrane characterization, calculating NF treatment performance, investigating uranium adsorption to the functionalized polyamide top layer of the membrane, and determining membrane selectivity. Under batch experiments, using environmentally relevant ion concentrations, we measured uranium rejection rates for the NF90 between 58–99% and NF270 between 4–98%. The mechanisms of low uranium rejection are not only explained by steric hindrance but also by the reduction of the Donnan exclusion mechanism, which originates from the decrease in membrane charge density caused by the addition of mono- and divalent ions. Additionally, exclusion mechanisms were observed to be directly influenced by solution pH, which governs the variation in uranyl complexation type and membrane charge. Calcium has a complexation affinity to uranium with broad implications in uranyl-complex molecular weight, valance, and molecular shape, all of which can influence water treatment efficiency. Lastly, both membranes were evaluated based on their membrane selectivity, the ratio of cation fluxes to uranium(<small>VI</small>) ion flux. Ideal membrane selectivity occurred at pH 7. Na<small><sup>+</sup></small> to uranium(<small>VI</small>) ion ratio was 190 for NF90 and 100 for NF270. The results of this study advance the understanding of using NF membranes for groundwater uranium removal.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141506963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paul Genz, Anna Hendrike Hofmann, Victor Takazi Katayama, Thorsten Reemtsma
Centrate from digested sludge dewatering holds promise for nutrient recovery, but concerns about organic and inorganic contaminants must be addressed. This study investigates the effectiveness of a two-stage system in retaining organic micropollutants, metals, and metalloids during recovery of a multi-nutrient solution from centrate. In combination, the lab-scale membrane bioreactor (MBR) and electrodialysis (ED) effectively reduced contaminant loads by >90% for 21 of the monitored 22 organic micropollutants and for six of nine metals and metalloids. The combined process demonstrated resilience to fluctuations in the MBR stage, with a temporary 87% decrease in MBR removal efficiency for carbamazepine translating to only 6% decrease after the ED. Despite this robust performance, individual compounds such as valsartan acid or benzotriazole were detected at around 10–20 μg L−1 in the recovered nutrient solution. Zn was present at around 400 μg L−1 with the highest concentrations of monitored metals. Still, all metals ranged at least one order of magnitude below recommended values for wastewater reuse. Therefore, the risk associated with contaminant uptake into hydroponically cultivated produce is considered low, given the high retention in the system and the necessary dilution of the multi-nutrient solution before its application as fertilizer. This study demonstrates the effective removal of contaminants by the combination of MBR and ED for nutrient recovery from centrate, achieving a fit-for-purpose quality of the derived multi-nutrient solution.
消化污泥脱水后的中心液有望实现养分回收，但必须解决有机和无机污染物的问题。本研究调查了两级系统在从中心液中回收多种营养液时保留有机微污染物、金属和类金属的有效性。将实验室规模的膜生物反应器（MBR）和电渗析（ED）结合使用，可有效减少污染物负荷，在监测的 22 种有机微污染物中，有 21 种污染物的负荷减少了 90%，在 9 种金属和类金属中，有 6 种污染物的负荷减少了 90%。该组合工艺对 MBR 阶段的波动表现出很强的适应能力，在 ED 之后，MBR 对卡马西平的去除效率暂时降低了 87%，而 ED 之后仅降低了 6%。尽管性能强劲，但在回收的营养液中检测到的缬沙坦酸或苯并三唑等单个化合物的浓度约为 10-20 μg L-1。锌的含量约为 400 μg L-1，是监测到的金属中浓度最高的。尽管如此，所有金属的含量都比废水回用的建议值低至少一个数量级。因此，考虑到水培系统的高滞留性以及多种营养素溶液在作为肥料施用前的必要稀释，与污染物摄入水培农产品相关的风险被认为很低。这项研究表明，采用 MBR 和 ED 组合从中心液中回收养分，可有效去除污染物，从而使衍生的多种养分溶液达到适用的质量。
{"title":"Multiple barriers for micropollutants in nutrient recovery from centrate – combining membrane bioreactor and electrodialysis","authors":"Paul Genz, Anna Hendrike Hofmann, Victor Takazi Katayama, Thorsten Reemtsma","doi":"10.1039/d4ew00063c","DOIUrl":"https://doi.org/10.1039/d4ew00063c","url":null,"abstract":"Centrate from digested sludge dewatering holds promise for nutrient recovery, but concerns about organic and inorganic contaminants must be addressed. This study investigates the effectiveness of a two-stage system in retaining organic micropollutants, metals, and metalloids during recovery of a multi-nutrient solution from centrate. In combination, the lab-scale membrane bioreactor (MBR) and electrodialysis (ED) effectively reduced contaminant loads by >90% for 21 of the monitored 22 organic micropollutants and for six of nine metals and metalloids. The combined process demonstrated resilience to fluctuations in the MBR stage, with a temporary 87% decrease in MBR removal efficiency for carbamazepine translating to only 6% decrease after the ED. Despite this robust performance, individual compounds such as valsartan acid or benzotriazole were detected at around 10–20 μg L<small><sup>−1</sup></small> in the recovered nutrient solution. Zn was present at around 400 μg L<small><sup>−1</sup></small> with the highest concentrations of monitored metals. Still, all metals ranged at least one order of magnitude below recommended values for wastewater reuse. Therefore, the risk associated with contaminant uptake into hydroponically cultivated produce is considered low, given the high retention in the system and the necessary dilution of the multi-nutrient solution before its application as fertilizer. This study demonstrates the effective removal of contaminants by the combination of MBR and ED for nutrient recovery from centrate, achieving a fit-for-purpose quality of the derived multi-nutrient solution.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Helena Pérez del Pulgar, Josefa Ortiz-Bustos, Santiago Gómez-Ruiz, Isabel del Hierro, Yolanda Pérez
Visible-light-driven photocatalysis is considered as a sustainable and cost-effective method for water remediation. In aquatic environments, the coexistence of multiple contaminants, such as organic and inorganic compounds, poses a potential threat to both biological organisms and human health, complicating their removal. Despite the urgent need for the development of comprehensive solutions, the research on the concurrent and simultaneous removal of multiple pollutants remains limited primarily relies on photocatalysts based on heterojunctions. To address this issue, we have prepared BiOCl0.9I0.1 and BiOBr0.9I0.1 solid solutions, exhibiting well-tailored band gaps and energetics of the conduction and valence bands, using an easy chemical precipitation approach. These synthesized materials exhibited exceptional photocatalytic efficacy under visible light, effectively removing a complex mixture of contaminants, including ciprofloxacin (CIP), methylparaben (MP), and rhodamine B (RhB), from water. Particularly noteworthy was the outstanding performance of BiOCl0.9I0.1, which demonstrated a complete removal of RhB within 10 min, CIP within 40 min, and an 86% degradation of MP within 40 min. This superior performance can be attributed to the materials' exceptional optical and (photo)electrochemical properties. Furthermore, the synergistic or antagonistic effects coexisting contaminants, organic matter, and inorganic ions on the photodegradation process were also investigated. Additionally, the generation of reactive oxygen species (ROS), and the elucidation of the degradation pathways were examined providing valuable insights into the intricate interplay of environmental factors that may have an influence on the photocatalytic performance. Our study shows, therefore, the high potential of BiOCl0.9I0.1 and BiOBr0.9I0.1 as promising candidates for the simultaneous removal of diverse water pollutants, offering a robust and efficient approach towards advancing water purification technologies.
{"title":"Efficient visible-light-driven photocatalysis: simultaneous degradation of multiple pollutants with bismuth oxyhalide solid solutions","authors":"Helena Pérez del Pulgar, Josefa Ortiz-Bustos, Santiago Gómez-Ruiz, Isabel del Hierro, Yolanda Pérez","doi":"10.1039/d4ew00410h","DOIUrl":"https://doi.org/10.1039/d4ew00410h","url":null,"abstract":"Visible-light-driven photocatalysis is considered as a sustainable and cost-effective method for water remediation. In aquatic environments, the coexistence of multiple contaminants, such as organic and inorganic compounds, poses a potential threat to both biological organisms and human health, complicating their removal. Despite the urgent need for the development of comprehensive solutions, the research on the concurrent and simultaneous removal of multiple pollutants remains limited primarily relies on photocatalysts based on heterojunctions. To address this issue, we have prepared BiOCl<small><sub>0.9</sub></small>I<small><sub>0.1</sub></small> and BiOBr<small><sub>0.9</sub></small>I<small><sub>0.1</sub></small> solid solutions, exhibiting well-tailored band gaps and energetics of the conduction and valence bands, using an easy chemical precipitation approach. These synthesized materials exhibited exceptional photocatalytic efficacy under visible light, effectively removing a complex mixture of contaminants, including ciprofloxacin (CIP), methylparaben (MP), and rhodamine B (RhB), from water. Particularly noteworthy was the outstanding performance of BiOCl<small><sub>0.9</sub></small>I<small><sub>0.1</sub></small>, which demonstrated a complete removal of RhB within 10 min, CIP within 40 min, and an 86% degradation of MP within 40 min. This superior performance can be attributed to the materials' exceptional optical and (photo)electrochemical properties. Furthermore, the synergistic or antagonistic effects coexisting contaminants, organic matter, and inorganic ions on the photodegradation process were also investigated. Additionally, the generation of reactive oxygen species (ROS), and the elucidation of the degradation pathways were examined providing valuable insights into the intricate interplay of environmental factors that may have an influence on the photocatalytic performance. Our study shows, therefore, the high potential of BiOCl<small><sub>0.9</sub></small>I<small><sub>0.1</sub></small> and BiOBr<small><sub>0.9</sub></small>I<small><sub>0.1</sub></small> as promising candidates for the simultaneous removal of diverse water pollutants, offering a robust and efficient approach towards advancing water purification technologies.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Junda Lai, Zizheng Huangfu, Jiewen Xiao, Zhenbei Wang, Yatao Liu, Chen Li, Fan Li, Yunhan Jia, Qiang Wang, Fei Qi, Amir Ikhlaq, Jolanta Kumirska, Ewa Maria Siedlecka, Oksana Ismailova
Catalytic ozonation is an effective method for wastewater purification. However, the low transfer of ozone in packed bubble columns leads to low ozone utilization efficiency, limited organic degradation, and high energy consumption. To address these issues, activated carbon supported catalysts, such as CuMn2O4@WAC and CuMn2O4@CSAC, have been developed, which exhibit excellent catalytic activity, stability, and high ozone utilization efficiency for the degradation of IBP in pharmaceutical wastewater. The addition of CuMn2O4@WAC or CuMn2O4@CSAC significantly increased the removal efficiency of IBP from 85% to 99%, while reducing energy consumption from 2.86 kW h m−3 to 0.80 kW h m−3 or 1.11 kW h m−3, respectively. Carboxyl groups on the surface of AC and oxygen vacancies on CuMn2O4 are key active sites for ozone adsorption and decomposition. Additionally, DFT calculations revealed that Mn–OV sites on CuMn2O4 play a crucial role in these processes, where ozone is adsorbed and decomposed into atomic oxygen and peroxide. The synergy between activated carbon supported CuMn2O4 enhances mass transfer and promotes ozone decomposition, generating highly reactive species that effectively degrade IBP in pharmaceutical wastewater. Overall, utilizing activated carbon supported CuMn2O4 for catalytic ozonation presents a promising approach for pharmaceutical wastewater treatment.
{"title":"Synergistic effect by supported activated carbon between functional groups and metal oxygen vacancies: enhancing ibuprofen degradation by improving ozone mass transfer","authors":"Junda Lai, Zizheng Huangfu, Jiewen Xiao, Zhenbei Wang, Yatao Liu, Chen Li, Fan Li, Yunhan Jia, Qiang Wang, Fei Qi, Amir Ikhlaq, Jolanta Kumirska, Ewa Maria Siedlecka, Oksana Ismailova","doi":"10.1039/d4ew00244j","DOIUrl":"https://doi.org/10.1039/d4ew00244j","url":null,"abstract":"Catalytic ozonation is an effective method for wastewater purification. However, the low transfer of ozone in packed bubble columns leads to low ozone utilization efficiency, limited organic degradation, and high energy consumption. To address these issues, activated carbon supported catalysts, such as CuMn<small><sub>2</sub></small>O<small><sub>4</sub></small>@WAC and CuMn<small><sub>2</sub></small>O<small><sub>4</sub></small>@CSAC, have been developed, which exhibit excellent catalytic activity, stability, and high ozone utilization efficiency for the degradation of IBP in pharmaceutical wastewater. The addition of CuMn<small><sub>2</sub></small>O<small><sub>4</sub></small>@WAC or CuMn<small><sub>2</sub></small>O<small><sub>4</sub></small>@CSAC significantly increased the removal efficiency of IBP from 85% to 99%, while reducing energy consumption from 2.86 kW h m<small><sup>−3</sup></small> to 0.80 kW h m<small><sup>−3</sup></small> or 1.11 kW h m<small><sup>−3</sup></small>, respectively. Carboxyl groups on the surface of AC and oxygen vacancies on CuMn<small><sub>2</sub></small>O<small><sub>4</sub></small> are key active sites for ozone adsorption and decomposition. Additionally, DFT calculations revealed that Mn–O<small><sub>V</sub></small> sites on CuMn<small><sub>2</sub></small>O<small><sub>4</sub></small> play a crucial role in these processes, where ozone is adsorbed and decomposed into atomic oxygen and peroxide. The synergy between activated carbon supported CuMn<small><sub>2</sub></small>O<small><sub>4</sub></small> enhances mass transfer and promotes ozone decomposition, generating highly reactive species that effectively degrade IBP in pharmaceutical wastewater. Overall, utilizing activated carbon supported CuMn<small><sub>2</sub></small>O<small><sub>4</sub></small> for catalytic ozonation presents a promising approach for pharmaceutical wastewater treatment.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141507001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Green stormwater infrastructure (GSI) is being increasingly implemented in urban areas as a nature-based solution to improve water quality and increase groundwater recharge. Nevertheless, GSI is inefficient at removing many trace organic contaminants (TOrCs) and dissolved nutrients, potentially risking groundwater contamination. We developed and characterized novel engineered geomedia to rapidly capture stormwater pollutants via sorption, including TOrCs and dissolved nutrients, while bioaugmenting microorganisms to subsequently degrade captured contaminants in GSI. We created “BioSorp Bead” geomedia by encapsulating powdered activated carbon [PAC] (sorbent), iron-based water treatment residual [FeWTR] (density, sorbent), wood flour [WF] (growth substrate), white-rot-fungi [WRF] (model biodegrading organism), and AQDS (model electron shuttle) in cation-alginate matrices (Ca2+, Fe3+). We thoroughly mixed WRF culture with autoclaved PAC, FeWTR, AQDS, and WF in 1% alginate. This mixture was added dropwise via peristaltic pump into 270.3 mM CaCl2/FeCl3 (on a platform shaker) to instantaneously form beads that were then air-dried. Encapsulated fungi remained viable in dried beads over an extended period (3 months at room temperature), demonstrating potential for bioaugmentation applications. We quantified bead physical properties (i.e., surface area, pore volume, mechanical strength, swelling, leaching), demonstrating that properties can be customized by adjusting composition parameters (e.g., crosslinking with FeCl3vs. CaCl2 increased bead mechanical strength). We also conducted preliminary sorption experiments to evaluate capture potential for imidacloprid (neonicotinoid insecticide) from synthetic stormwater runoff. The envisioned goal of the BioSorp Beads is to facilitate rapid contaminant capture during infiltration of storm events and support microorganisms that subsequently degrade sorbed chemicals, thus renewing GSI sorption capacity in situ.
{"title":"Development of composite alginate bead media with encapsulated sorptive materials and microorganisms to bioaugment green stormwater infrastructure","authors":"Debojit S. Tanmoy, Gregory H. LeFevre","doi":"10.1039/d4ew00289j","DOIUrl":"https://doi.org/10.1039/d4ew00289j","url":null,"abstract":"Green stormwater infrastructure (GSI) is being increasingly implemented in urban areas as a nature-based solution to improve water quality and increase groundwater recharge. Nevertheless, GSI is inefficient at removing many trace organic contaminants (TOrCs) and dissolved nutrients, potentially risking groundwater contamination. We developed and characterized novel engineered geomedia to rapidly capture stormwater pollutants <em>via</em> sorption, including TOrCs and dissolved nutrients, while bioaugmenting microorganisms to subsequently degrade captured contaminants in GSI. We created “BioSorp Bead” geomedia by encapsulating powdered activated carbon [PAC] (sorbent), iron-based water treatment residual [FeWTR] (density, sorbent), wood flour [WF] (growth substrate), white-rot-fungi [WRF] (model biodegrading organism), and AQDS (model electron shuttle) in cation-alginate matrices (Ca<small><sup>2+</sup></small>, Fe<small><sup>3+</sup></small>). We thoroughly mixed WRF culture with autoclaved PAC, FeWTR, AQDS, and WF in 1% alginate. This mixture was added dropwise <em>via</em> peristaltic pump into 270.3 mM CaCl<small><sub>2</sub></small>/FeCl<small><sub>3</sub></small> (on a platform shaker) to instantaneously form beads that were then air-dried. Encapsulated fungi remained viable in dried beads over an extended period (3 months at room temperature), demonstrating potential for bioaugmentation applications. We quantified bead physical properties (<em>i.e.</em>, surface area, pore volume, mechanical strength, swelling, leaching), demonstrating that properties can be customized by adjusting composition parameters (<em>e.g.</em>, crosslinking with FeCl<small><sub>3</sub></small> <em>vs.</em> CaCl<small><sub>2</sub></small> increased bead mechanical strength). We also conducted preliminary sorption experiments to evaluate capture potential for imidacloprid (neonicotinoid insecticide) from synthetic stormwater runoff. The envisioned goal of the BioSorp Beads is to facilitate rapid contaminant capture during infiltration of storm events and support microorganisms that subsequently degrade sorbed chemicals, thus renewing GSI sorption capacity <em>in situ</em>.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anil Kumar K., Arpit Bisoi, Yeshwanth M., Shobham, Mohan Jujaru, Jitendra Panwar, Suresh Gupta
The present study demonstrated the synthesis of sustainable and eco-friendly composites composed of Fe & Al metal–organic frameworks (Fe-MOF and Al-MOF) and their graphene oxide composites (AlGC and FeGC). Post-synthetic surface functionalization of developed composites was done with Moringa oleifera leaves powder extract. The synthesized MOFs and composites were characterized using standard techniques. The ability of synthesized MOFs and composites to remove methyl orange (MO) and methylene blue (MB) dyes from wastewater was evaluated. Based on the higher dye removal ability, detailed dye adsorption studies were performed with functionalized composites (AlGC and FeGC). Taguchi optimization design was utilized to optimize the four testing factors, viz. contact time, initial dye concentration, composite dosage, and temperature, along with five levels for each factor to achieve the highest capacity for dye adsorption. The composites exhibited outstanding equilibrium adsorption capacities for MO (AlGC: 577 ± 37 and FeGC: 631 ± 42 mg g−1) and MB (AlGC: 336 ± 13 and FeGC: 387 ± 7 mg g−1) dyes, which are found to be the highest among the reported composites so far. Applying isotherms, kinetics, and thermodynamic models confirmed the spontaneous, endothermic reactions for the physisorption of both dyes. The regeneration studies showed more than ∼65% dye removal efficiency of both the composites up to three adsorption–desorption cycles, which confirms their reusability at the industrial scale. The environmental toxicity of developed composites was analyzed by antibacterial studies against selected ecologically important soil bacteria as well as by molecular docking studies against protein targets of selected microorganisms.
{"title":"Unveiling the dye adsorption capability of Moringa oleifera functionalized hybrid porous MOF–GO composites: in vitro and in silico ecotoxicity assessment via antibacterial and molecular docking studies","authors":"Anil Kumar K., Arpit Bisoi, Yeshwanth M., Shobham, Mohan Jujaru, Jitendra Panwar, Suresh Gupta","doi":"10.1039/d4ew00185k","DOIUrl":"https://doi.org/10.1039/d4ew00185k","url":null,"abstract":"The present study demonstrated the synthesis of sustainable and eco-friendly composites composed of Fe & Al metal–organic frameworks (Fe-MOF and Al-MOF) and their graphene oxide composites (AlGC and FeGC). Post-synthetic surface functionalization of developed composites was done with <em>Moringa oleifera</em> leaves powder extract. The synthesized MOFs and composites were characterized using standard techniques. The ability of synthesized MOFs and composites to remove methyl orange (MO) and methylene blue (MB) dyes from wastewater was evaluated. Based on the higher dye removal ability, detailed dye adsorption studies were performed with functionalized composites (AlGC and FeGC). Taguchi optimization design was utilized to optimize the four testing factors, <em>viz.</em> contact time, initial dye concentration, composite dosage, and temperature, along with five levels for each factor to achieve the highest capacity for dye adsorption. The composites exhibited outstanding equilibrium adsorption capacities for MO (AlGC: 577 ± 37 and FeGC: 631 ± 42 mg g<small><sup>−1</sup></small>) and MB (AlGC: 336 ± 13 and FeGC: 387 ± 7 mg g<small><sup>−1</sup></small>) dyes, which are found to be the highest among the reported composites so far. Applying isotherms, kinetics, and thermodynamic models confirmed the spontaneous, endothermic reactions for the physisorption of both dyes. The regeneration studies showed more than ∼65% dye removal efficiency of both the composites up to three adsorption–desorption cycles, which confirms their reusability at the industrial scale. The environmental toxicity of developed composites was analyzed by antibacterial studies against selected ecologically important soil bacteria as well as by molecular docking studies against protein targets of selected microorganisms.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tamara J. H. M. van Bergen, A. M. Schipper, D. Mooij, A. M. J. Ragas, M. W. Kuiper, A. J. Hendriks, M. A. J. Huijbregts, R. van Zelm
Correction for ‘Removal rate constants are not necessarily constant: the case of organic micropollutant removal in wastewater treatment plants’ by Tamara J. H. M. van Bergen et al., Environ. Sci.: Water Res. Technol., 2024, https://doi.org/10.1039/D4EW00377B.
对 Tamara J. H. M. van Bergen 等人撰写的 "去除率常数不一定恒定：废水处理厂去除有机微污染物的案例 "的更正，Environ.Sci：水研究技术》，2024 年，https://doi.org/10.1039/D4EW00377B。
{"title":"Correction: Removal rate constants are not necessarily constant: the case of organic micropollutant removal in wastewater treatment plants","authors":"Tamara J. H. M. van Bergen, A. M. Schipper, D. Mooij, A. M. J. Ragas, M. W. Kuiper, A. J. Hendriks, M. A. J. Huijbregts, R. van Zelm","doi":"10.1039/d4ew90025a","DOIUrl":"https://doi.org/10.1039/d4ew90025a","url":null,"abstract":"Correction for ‘Removal rate constants are not necessarily constant: the case of organic micropollutant removal in wastewater treatment plants’ by Tamara J. H. M. van Bergen <em>et al.</em>, <em>Environ. Sci.: Water Res. Technol.</em>, 2024, https://doi.org/10.1039/D4EW00377B.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Madison Gouthro, Emalie K. Hayes, Naomi Lewis, Megan Fuller, Jamileh Shojaei, John Frampton, Amina K. Stoddart, Graham A. Gagnon
Existing techniques for concentrating viruses from wastewater are often time consuming, costly, and usually involve cumbersome laboratory methods, limiting their practical application for routine use. As such, the need for simpler concentration methods that do not forfeit efficacy are crucial for permitting more accessible detection of viruses from wastewater. This study introduces a rapid concentration method using powdered activated charcoal sodium alginate (PAC-NaA) hydrogel beads, optimized for capturing viruses from wastewater. Through scanning electron microscopy and bench-scale experiments, we optimized hydrogel bead formulation and identified a Tween®20-based buffer as the most effective elution buffer for recovering SARS-CoV-2 from the hydrogel beads. Kinetic adsorption parameters were also evaluated, establishing a 5 min exposure duration for maximum viral recovery. Model fitting of the experimental data indicated that the adsorption process adheres to a non-linear pseudo-second-order model, indicative of physiochemical adsorption mechanisms likely facilitating viral capturing from wastewater. Additionally, successful detection of endogenous SARS-CoV-2 and Adenovirus was achieved using the PAC-NaA hydrogel concentration method. The advantages of this approach lie in its adaptability and simplicity, as hydrogel beads can be modified to enhance viral adsorption efficiency in various environmental contexts.
{"title":"Development of a powdered activated charcoal sodium alginate hydrogel bead concentration method for detecting viruses in wastewater","authors":"Madison Gouthro, Emalie K. Hayes, Naomi Lewis, Megan Fuller, Jamileh Shojaei, John Frampton, Amina K. Stoddart, Graham A. Gagnon","doi":"10.1039/d4ew00370e","DOIUrl":"https://doi.org/10.1039/d4ew00370e","url":null,"abstract":"Existing techniques for concentrating viruses from wastewater are often time consuming, costly, and usually involve cumbersome laboratory methods, limiting their practical application for routine use. As such, the need for simpler concentration methods that do not forfeit efficacy are crucial for permitting more accessible detection of viruses from wastewater. This study introduces a rapid concentration method using powdered activated charcoal sodium alginate (PAC-NaA) hydrogel beads, optimized for capturing viruses from wastewater. Through scanning electron microscopy and bench-scale experiments, we optimized hydrogel bead formulation and identified a Tween®20-based buffer as the most effective elution buffer for recovering SARS-CoV-2 from the hydrogel beads. Kinetic adsorption parameters were also evaluated, establishing a 5 min exposure duration for maximum viral recovery. Model fitting of the experimental data indicated that the adsorption process adheres to a non-linear pseudo-second-order model, indicative of physiochemical adsorption mechanisms likely facilitating viral capturing from wastewater. Additionally, successful detection of endogenous SARS-CoV-2 and Adenovirus was achieved using the PAC-NaA hydrogel concentration method. The advantages of this approach lie in its adaptability and simplicity, as hydrogel beads can be modified to enhance viral adsorption efficiency in various environmental contexts.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Saba Seyedi, Kaushik Venkiteshwaran, Daniel Zitomer
Aqueous pyrolysis liquid (APL) from municipal wastewater solids (WWS) pyrolysis has a high chemical oxygen demand and diverse organics (N-heterocyclic, aromatic, and phenolic compounds) that can potentially introduce hazardous chemicals to the environment or result in disposal expenses. Therefore, new APL management and energy recovery strategies would be beneficial. The anaerobic degradability of APLs originating from WWS pyrolyzed at 500 and 700 °C was investigated under varying pre-ozonation conditions and by using four distinct inocula. The 700 °C APL was more toxic to anaerobic microorganisms in batch anaerobic toxicity assays and pre-ozonation decreased the toxicity as demonstrated by increased subsequent methane production rates (10–55% increase). The 500 °C APL did not show toxicity under the conditions tested and ozonation had limited impact on subsequent methane production. Microbial communities of two of the inocula demonstrated small shifts during APL digestion compared to the other two, suggesting potential acclimation of the initial inoculum to APL-like constituents. This study highlights that both APL pre-ozonation and type of inocula can significantly affect the anaerobic toxicity response to APL. While anaerobic treatment of municipal wastewater-derived APL is viable, pyrolysis temperature, organic loading rates, pretreatment and microbial community composition play important roles in biogas production.
{"title":"Improved methanogenesis from aqueous pyrolysis liquid (APL) by inoculum selection and pre-ozonation","authors":"Saba Seyedi, Kaushik Venkiteshwaran, Daniel Zitomer","doi":"10.1039/d3ew00768e","DOIUrl":"https://doi.org/10.1039/d3ew00768e","url":null,"abstract":"Aqueous pyrolysis liquid (APL) from municipal wastewater solids (WWS) pyrolysis has a high chemical oxygen demand and diverse organics (N-heterocyclic, aromatic, and phenolic compounds) that can potentially introduce hazardous chemicals to the environment or result in disposal expenses. Therefore, new APL management and energy recovery strategies would be beneficial. The anaerobic degradability of APLs originating from WWS pyrolyzed at 500 and 700 °C was investigated under varying pre-ozonation conditions and by using four distinct inocula. The 700 °C APL was more toxic to anaerobic microorganisms in batch anaerobic toxicity assays and pre-ozonation decreased the toxicity as demonstrated by increased subsequent methane production rates (10–55% increase). The 500 °C APL did not show toxicity under the conditions tested and ozonation had limited impact on subsequent methane production. Microbial communities of two of the inocula demonstrated small shifts during APL digestion compared to the other two, suggesting potential acclimation of the initial inoculum to APL-like constituents. This study highlights that both APL pre-ozonation and type of inocula can significantly affect the anaerobic toxicity response to APL. While anaerobic treatment of municipal wastewater-derived APL is viable, pyrolysis temperature, organic loading rates, pretreatment and microbial community composition play important roles in biogas production.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Swapna Rekha Panda, Sudeep Asthana, Krunal Suthar, Arvind S. Madalgi, Amit Kumar, Haresh Dave, Rakesh Kumar Sinha, Koshal Kishor, Ahmad F. Ismail
Recycling and reusing wastewater from diverse industries by adopting the simple dynamics of process intensification (PI) have emerged as a promising development route for the chemical process industry due to their potential to offer innovative and sustainable alternatives. This review summarizes the routes for recycling wastewater via various processes and separation techniques, which can be implemented at different scales, such as the phenomenon scale and task scale. Recent trends in process intensification have highlighted the importance of the widespread adoption of membrane-based processes owing to their low cost, compactness, energy efficiency, modularity and sustainable operation. Various intensifying approaches such as membrane-based, reactive, and hybrid separation and the intensification of various types of membrane systems, including liquid, vapor and gas separation steps such as pervaporation and vapor permeation while covering a wide range of operations and other processes for wastewater treatment are presented in this review. According to the literature, the advantages of PI for industrial application include cost reduction, increased safety, reduced emissions and environmental footprint, and improved resource efficiency using energy and water resources more efficiently. Overall, herein, we provide a comprehensive overview of recycling and reusing steps using the process intensification route from an engineering perspective, focusing on sustainable membrane-based techniques using hybrid and integrated technology.
通过采用工艺强化（PI）这一简单的动态方法回收和再利用来自不同行业的废水，已成为化学工艺行业的一条具有发展前景的途径，因为它们具有提供创新和可持续替代品的潜力。本综述总结了通过各种工艺和分离技术回收利用废水的途径，这些工艺和分离技术可在不同规模（如现象规模和任务规模）上实施。由于膜工艺成本低、结构紧凑、能效高、模块化和可持续运行，最近的工艺强化趋势凸显了广泛采用膜工艺的重要性。本综述介绍了各种强化方法，如膜分离、反应分离和混合分离，以及各种类型膜系统的强化，包括液体、蒸汽和气体分离步骤，如渗透蒸发和蒸汽渗透，同时涵盖废水处理的各种操作和其他流程。根据文献资料，工业应用 PI 的优势包括降低成本、提高安全性、减少排放和环境足迹，以及提高资源效率，更有效地利用能源和水资源。总之，我们在此从工程学角度全面概述了使用工艺强化路线的回收和再利用步骤，重点介绍了使用混合和集成技术的可持续膜技术。
{"title":"Process intensification in the fields to separate, recycle and reuse waste through membrane technology","authors":"Swapna Rekha Panda, Sudeep Asthana, Krunal Suthar, Arvind S. Madalgi, Amit Kumar, Haresh Dave, Rakesh Kumar Sinha, Koshal Kishor, Ahmad F. Ismail","doi":"10.1039/d4ew00306c","DOIUrl":"https://doi.org/10.1039/d4ew00306c","url":null,"abstract":"Recycling and reusing wastewater from diverse industries by adopting the simple dynamics of process intensification (PI) have emerged as a promising development route for the chemical process industry due to their potential to offer innovative and sustainable alternatives. This review summarizes the routes for recycling wastewater <em>via</em> various processes and separation techniques, which can be implemented at different scales, such as the phenomenon scale and task scale. Recent trends in process intensification have highlighted the importance of the widespread adoption of membrane-based processes owing to their low cost, compactness, energy efficiency, modularity and sustainable operation. Various intensifying approaches such as membrane-based, reactive, and hybrid separation and the intensification of various types of membrane systems, including liquid, vapor and gas separation steps such as pervaporation and vapor permeation while covering a wide range of operations and other processes for wastewater treatment are presented in this review. According to the literature, the advantages of PI for industrial application include cost reduction, increased safety, reduced emissions and environmental footprint, and improved resource efficiency using energy and water resources more efficiently. Overall, herein, we provide a comprehensive overview of recycling and reusing steps using the process intensification route from an engineering perspective, focusing on sustainable membrane-based techniques using hybrid and integrated technology.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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