Pub Date : 2024-09-20DOI: 10.1021/acsestwater.4c00500
Simranjeet Singh, Pavithra N., Basavaraju Uppara, Radhika Varshney, Nabila Shehata, Nadeem A. Khan, Jinu Joji, Joginder Singh, Praveen C. Ramamurthy
This study addresses the critical challenge of removing lead (Pb2+) from wastewater due to its high toxicity. ZIF-67/PVA nanofibers were developed by integrating zeolitic imidazolate framework (ZIF-67) nanoparticles into electrospun poly(vinyl alcohol) (PVA). The synthesized material was thoroughly characterized using SEM, Raman spectroscopy, XRD, FTIR, TGA, and XPS. Adsorption studies of Pb2+ were conducted by varying parameters such as initial concentration, ZIF-67/PVA dosage, pH, and contact time. The adsorption process was analyzed using both linear and nonlinear isotherms, with the data best fitting the PFO and Avrami kinetic models (R2 = 0.98) and the nonlinear Freundlich isotherm model (R2 = 0.91). The nanofibers demonstrated high efficacy, with a maximum Pb2+ adsorption capacity of 140.3 mg g–1 at pH 6, initial ion concentration of 10 and 20 mg L–1 ZIF-67/PVA. Molecular docking simulations indicated that the adsorption primarily involves electrostatic and hydrogen-bonding interactions. The results highlight the potential of ZIF-67/PVA nanofibers for water treatment, emphasizing their effectiveness, regeneration capability, and suitability for sustainable remediation applications.
{"title":"Facile Synthesis of ZIF-67-Incorporated Electrospun PVA Nanofibers Composite for Efficient Pb (II) Adsorption from Water: Docking and Experimental Studies","authors":"Simranjeet Singh, Pavithra N., Basavaraju Uppara, Radhika Varshney, Nabila Shehata, Nadeem A. Khan, Jinu Joji, Joginder Singh, Praveen C. Ramamurthy","doi":"10.1021/acsestwater.4c00500","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00500","url":null,"abstract":"This study addresses the critical challenge of removing lead (Pb<sup>2+</sup>) from wastewater due to its high toxicity. ZIF-67/PVA nanofibers were developed by integrating zeolitic imidazolate framework (ZIF-67) nanoparticles into electrospun poly(vinyl alcohol) (PVA). The synthesized material was thoroughly characterized using SEM, Raman spectroscopy, XRD, FTIR, TGA, and XPS. Adsorption studies of Pb<sup>2+</sup> were conducted by varying parameters such as initial concentration, ZIF-67/PVA dosage, pH, and contact time. The adsorption process was analyzed using both linear and nonlinear isotherms, with the data best fitting the PFO and Avrami kinetic models (<i>R</i><sup>2</sup> = 0.98) and the nonlinear Freundlich isotherm model (<i>R</i><sup>2</sup> = 0.91). The nanofibers demonstrated high efficacy, with a maximum Pb<sup>2+</sup> adsorption capacity of 140.3 mg g<sup>–1</sup> at pH 6, initial ion concentration of 10 and 20 mg L<sup>–1</sup> ZIF-67/PVA. Molecular docking simulations indicated that the adsorption primarily involves electrostatic and hydrogen-bonding interactions. The results highlight the potential of ZIF-67/PVA nanofibers for water treatment, emphasizing their effectiveness, regeneration capability, and suitability for sustainable remediation applications.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The advent of atomically thin two-dimensional (2D) materials, with their distinct optical, physicochemical, and surface properties, offers a multitude of avenues for tackling environmental challenges and propelling advancements in clean energy technologies. Defect engineering emerges as a key strategy in this pursuit, enhancing the material’s effectiveness across various applications and unlocking its inherent potential. This investigation reveals the extraordinary potential of 2D graphitic carbon nitride (g-C3N4) and modified g-C3N4 in propelling advancements across photochemical, electrochemical, and bioelectrochemical domains, with a primary emphasis on remediation techniques for water treatment, electrode development, and microplastic removal. The material’s exceptional properties, including its structural characteristics, adsorption capabilities, and photocatalytic activity, are also leveraged. This study underscores the critical importance of g-C3N4 as a multifaceted solution to pressing environmental and electrochemical issues, highlighting its role as a catalyst for innovation and progress in sustainable development initiatives.
{"title":"Defect Engineered 2D Graphitic Carbon Nitride for Photochemical, (Bio)Electrochemical, and Microplastic Remediation Advancements","authors":"Saikat Kumar Kuila, Anil Dhanda, Biswajit Samal, Makarand M. Ghangrekar, Brajesh Kumar Dubey, Tarun Kumar Kundu","doi":"10.1021/acsestwater.4c00478","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00478","url":null,"abstract":"The advent of atomically thin two-dimensional (2D) materials, with their distinct optical, physicochemical, and surface properties, offers a multitude of avenues for tackling environmental challenges and propelling advancements in clean energy technologies. Defect engineering emerges as a key strategy in this pursuit, enhancing the material’s effectiveness across various applications and unlocking its inherent potential. This investigation reveals the extraordinary potential of 2D graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) and modified g-C<sub>3</sub>N<sub>4</sub> in propelling advancements across photochemical, electrochemical, and bioelectrochemical domains, with a primary emphasis on remediation techniques for water treatment, electrode development, and microplastic removal. The material’s exceptional properties, including its structural characteristics, adsorption capabilities, and photocatalytic activity, are also leveraged. This study underscores the critical importance of g-C<sub>3</sub>N<sub>4</sub> as a multifaceted solution to pressing environmental and electrochemical issues, highlighting its role as a catalyst for innovation and progress in sustainable development initiatives.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-20DOI: 10.1021/acsestwater.4c00353
Cuimei Lv, Sensen Wang, Minhua Ling, Qianqian Cao, Shuang Li
Interbasin water transfer is widely used to ensure water supply security in water-scarce regions. However, the evolutionary mechanism of the water supply system in the receiving area under the impact of water diversion projects remains unclear. The theory of dissipative structures is utilized in this study to analyze the entropy flow of the water supply system in the receiving area. An entropy flow measurement index system is constructed, and the transformed Brussels model is combined to determine the evolutionary direction of the water supply system under the influence of the water diversion project. Taking Zhengzhou City as an example, the results show that after the South-to-North Water Transfer Project commenced operation, the evolutionary value increased from 0.048 to 0.199, indicating that the system is evolving toward a dissipative structure. In contrast, without the South-to-North Water Transfer Project, the evolutionary value decreased from −0.850 to −1.045, indicating that the system is evolving toward a nondissipative structure. Upon further discussion, it was found that the South-to-North Water Transfer enhanced the negative entropy of environmental management in Zhengzhou’s water supply system, reduced the positive entropy of the water supply mode, and steered the system toward sustainable and healthy evolution.
{"title":"The Evolution Mechanism of the Water Supply System in the Water Receiving Area of a Water Diversion Project Inspired by Dissipative Structure Theory","authors":"Cuimei Lv, Sensen Wang, Minhua Ling, Qianqian Cao, Shuang Li","doi":"10.1021/acsestwater.4c00353","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00353","url":null,"abstract":"Interbasin water transfer is widely used to ensure water supply security in water-scarce regions. However, the evolutionary mechanism of the water supply system in the receiving area under the impact of water diversion projects remains unclear. The theory of dissipative structures is utilized in this study to analyze the entropy flow of the water supply system in the receiving area. An entropy flow measurement index system is constructed, and the transformed Brussels model is combined to determine the evolutionary direction of the water supply system under the influence of the water diversion project. Taking Zhengzhou City as an example, the results show that after the South-to-North Water Transfer Project commenced operation, the evolutionary value increased from 0.048 to 0.199, indicating that the system is evolving toward a dissipative structure. In contrast, without the South-to-North Water Transfer Project, the evolutionary value decreased from −0.850 to −1.045, indicating that the system is evolving toward a nondissipative structure. Upon further discussion, it was found that the South-to-North Water Transfer enhanced the negative entropy of environmental management in Zhengzhou’s water supply system, reduced the positive entropy of the water supply mode, and steered the system toward sustainable and healthy evolution.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-19DOI: 10.1021/acsestwater.4c00385
Yolanda Dwi Astuti, Anindrya Nastiti, Rara D. Larasati, Dwina Roosmini, Muhammad Sonny Abfertiawan
Active Pharmaceutical Ingredients (APIs) in the aquatic environment have become a growing concern due to their potential health and environmental impacts. The review aims to examine the occurrence and removal efficiency of APIs in the influent and effluent of wastewater treatment plants (WWTPs) in Southeast Asian countries, including Thailand, Singapore, Malaysia, Indonesia, Vietnam, and the Philippines. The review covers five classes of APIs, i.e., nonsteroidal anti-inflammatory drugs (NSAIDs), antibiotics, anticonvulsants, antihypertensives, and stimulants. We systematically scoured Scopus-indexed articles published from 2011 to 2022 from Google Scholar, PubMed, and Dimensions and extracted measured concentrations of APIs detected in WWTPs. The wastewater influent contained the following APIs from each class in the highest mean or median concentrations: paracetamol (mean: 26,000 ng/L), ciprofloxacin (mean: 567.4 ng/L), gabapentin (median: up to 3609 ng/L), atenolol (median: up to 4124 ng/L), and caffeine (mean: 38,000 ng/L). Moreover, studies in Singapore have recorded the highest treatment efficiency on various APIs compared to those recorded in Malaysia, Thailand, or Vietnam. This study underscores the importance of implementing standardized monitoring techniques, enhancing wastewater infrastructure, and raising awareness among parties involved to address the environmental hazards linked to pharmaceutical pollution effectively.
{"title":"Occurrence and Removal Efficiency of Active Pharmaceutical Ingredients (APIs) in Wastewater Treatment Plants: A Systematic Review from Southeast Asia","authors":"Yolanda Dwi Astuti, Anindrya Nastiti, Rara D. Larasati, Dwina Roosmini, Muhammad Sonny Abfertiawan","doi":"10.1021/acsestwater.4c00385","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00385","url":null,"abstract":"Active Pharmaceutical Ingredients (APIs) in the aquatic environment have become a growing concern due to their potential health and environmental impacts. The review aims to examine the occurrence and removal efficiency of APIs in the influent and effluent of wastewater treatment plants (WWTPs) in Southeast Asian countries, including Thailand, Singapore, Malaysia, Indonesia, Vietnam, and the Philippines. The review covers five classes of APIs, i.e., nonsteroidal anti-inflammatory drugs (NSAIDs), antibiotics, anticonvulsants, antihypertensives, and stimulants. We systematically scoured Scopus-indexed articles published from 2011 to 2022 from Google Scholar, PubMed, and Dimensions and extracted measured concentrations of APIs detected in WWTPs. The wastewater influent contained the following APIs from each class in the highest mean or median concentrations: paracetamol (mean: 26,000 ng/L), ciprofloxacin (mean: 567.4 ng/L), gabapentin (median: up to 3609 ng/L), atenolol (median: up to 4124 ng/L), and caffeine (mean: 38,000 ng/L). Moreover, studies in Singapore have recorded the highest treatment efficiency on various APIs compared to those recorded in Malaysia, Thailand, or Vietnam. This study underscores the importance of implementing standardized monitoring techniques, enhancing wastewater infrastructure, and raising awareness among parties involved to address the environmental hazards linked to pharmaceutical pollution effectively.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-18DOI: 10.1021/acsestwater.4c00610
Ziyi Du, Jiahui Wang, Fangzhai Zhang, Yongzhen Peng
Anaerobic ammonia oxidation (Anammox) has garnered growing attention as an energy-efficient bioprocess. However, the sustainable provision of nitrite remains a crucial challenge. This study aimed to assess a promising alternative to existing partial nitrification- and heterotrophic partial denitrification (PDN)-based Anammox processes by substituting the nitrite supply with autotrophic sulfur-driven PDN. After 200 days, the desirable nitrogen removal efficiency of 96.1% was obtained in the S-PDN coupling Anammox process (S-PDN/A) with a high-quality effluent total nitrogen of 3.1 mg N/L. Additional experiments identified S-PDN/A as a stepwise reaction with generated S0 as an intermediate. Initially, S2– was oxidized to S0 [21.2 mg of S/(g of SS·h)], coupled with ultrafast denitrification [NO3– → N2, 3.9 mg of N/(g of SS·h)]. Subsequently, S0 served as an electron donor for S-PDN (NO3– → NO2–), efficiently facilitating Anammox as the dominant nitrogen removal pathway contributing up to 71.0% with a reaction rate of 1.7 mg N/(g SS·h). Distinct from reported prevalence of Candidatus brocadia in the Anammox technology for low-strength wastewater treatment, Candidatus kuenenia (0.12% → 3.4%) unexpectedly triumphed due to unique ecological niche provided by S-PDN. S-PDN/A offers fresh insights into Anammox application, enabling a potential reduction of up to 100% in organics demand, 43.0% savings in aeration energy consumption, and 69.9% decrease in biomass generation when compared to conventional bioprocesses.
{"title":"Autotrophic Sulfur-Driven Partial Denitrification as a Sustainable Nitrite Supply Pathway for Anammox: Insights on Enhanced Nitrogen Removal and Microbial Synergies","authors":"Ziyi Du, Jiahui Wang, Fangzhai Zhang, Yongzhen Peng","doi":"10.1021/acsestwater.4c00610","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00610","url":null,"abstract":"Anaerobic ammonia oxidation (Anammox) has garnered growing attention as an energy-efficient bioprocess. However, the sustainable provision of nitrite remains a crucial challenge. This study aimed to assess a promising alternative to existing partial nitrification- and heterotrophic partial denitrification (PDN)-based Anammox processes by substituting the nitrite supply with autotrophic sulfur-driven PDN. After 200 days, the desirable nitrogen removal efficiency of 96.1% was obtained in the S-PDN coupling Anammox process (S-PDN/A) with a high-quality effluent total nitrogen of 3.1 mg N/L. Additional experiments identified S-PDN/A as a stepwise reaction with generated S<sup>0</sup> as an intermediate. Initially, S<sup>2–</sup> was oxidized to S<sup>0</sup> [21.2 mg of S/(g of SS·h)], coupled with ultrafast denitrification [NO<sub>3</sub><sup>–</sup> → N<sub>2</sub>, 3.9 mg of N/(g of SS·h)]. Subsequently, S<sup>0</sup> served as an electron donor for S-PDN (NO<sub>3</sub><sup>–</sup> → NO<sub>2</sub><sup>–</sup>), efficiently facilitating Anammox as the dominant nitrogen removal pathway contributing up to 71.0% with a reaction rate of 1.7 mg N/(g SS·h). Distinct from reported prevalence of <i>Candidatus brocadia</i> in the Anammox technology for low-strength wastewater treatment, <i>Candidatus kuenenia</i> (0.12% → 3.4%) unexpectedly triumphed due to unique ecological niche provided by S-PDN. S-PDN/A offers fresh insights into Anammox application, enabling a potential reduction of up to 100% in organics demand, 43.0% savings in aeration energy consumption, and 69.9% decrease in biomass generation when compared to conventional bioprocesses.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-18DOI: 10.1021/acsestwater.4c00579
Bingnan Song, Renata D. van der Weijden, Chongxuan Liu, Yang Lei
Anthropogenic activities have dramatically increased the level of selenium (Se) discharge. We propose a simple yet highly efficient system based on iron electrocoagulation (Fe-EC) for simultaneous magnetite production and Se removal. The in situ-generated reductants [Fe(II)] and adsorbents (magnetite) led to Se removal (201 mg L–1 h–1) significantly outperforming ex situ magnetite adsorption (29.2 mg L–1 h–1). Selenite was rapidly adsorbed by iron (hydr)oxides and reduced to less toxic Se0, alleviating the risk of Se re-release from Se-laden solids. Se can be efficiently removed by 4 min Fe electrolysis at 0.11 A followed by an 11 min stirring, affording 84% removal efficiency under oxic conditions and 90% under anoxic conditions. Se removal continued during settling, reaching >99% after 24 h. Likewise, selenate could also be efficiently removed. In addition, the inhibitory effects of coexisting sulfate and bicarbonate were eliminated by adjusting the pH, current intensity, and dissolved oxygen concentration. Moreover, the practicality was verified in two types of simulated wastewater, managing Se removal from 600 to ≤3 μg L–1 at an energy consumption of 0.66–1 kWh m–3. Meanwhile, the produced particles were black solids with magnetic properties, which can be easily harvested from treated water by magnetic separation, overcoming the drawbacks of conventional (electrochemical) coagulation. This study provides new insights for developing a robust Fe-EC system for Se-laden wastewater treatment.
{"title":"Electrochemical In Situ Production of Magnetite for the Removal of Se from Wastewater","authors":"Bingnan Song, Renata D. van der Weijden, Chongxuan Liu, Yang Lei","doi":"10.1021/acsestwater.4c00579","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00579","url":null,"abstract":"Anthropogenic activities have dramatically increased the level of selenium (Se) discharge. We propose a simple yet highly efficient system based on iron electrocoagulation (Fe-EC) for simultaneous magnetite production and Se removal. The <i>in situ</i>-generated reductants [Fe(II)] and adsorbents (magnetite) led to Se removal (201 mg L<sup>–1</sup> h<sup>–1</sup>) significantly outperforming <i>ex situ</i> magnetite adsorption (29.2 mg L<sup>–1</sup> h<sup>–1</sup>). Selenite was rapidly adsorbed by iron (hydr)oxides and reduced to less toxic Se<sup>0</sup>, alleviating the risk of Se re-release from Se-laden solids. Se can be efficiently removed by 4 min Fe electrolysis at 0.11 A followed by an 11 min stirring, affording 84% removal efficiency under oxic conditions and 90% under anoxic conditions. Se removal continued during settling, reaching >99% after 24 h. Likewise, selenate could also be efficiently removed. In addition, the inhibitory effects of coexisting sulfate and bicarbonate were eliminated by adjusting the pH, current intensity, and dissolved oxygen concentration. Moreover, the practicality was verified in two types of simulated wastewater, managing Se removal from 600 to ≤3 μg L<sup>–1</sup> at an energy consumption of 0.66–1 kWh m<sup>–3</sup>. Meanwhile, the produced particles were black solids with magnetic properties, which can be easily harvested from treated water by magnetic separation, overcoming the drawbacks of conventional (electrochemical) coagulation. This study provides new insights for developing a robust Fe-EC system for Se-laden wastewater treatment.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-18DOI: 10.1021/acsestwater.4c00272
Camden G. Camacho, Alexander Antonison, Allison Oldnettle, Kaylie Anne Costa, Alina S. Timshina, Heather Ditz, Jake T. Thompson, Mackenzie M. Holden, William J. Sobczak, Jack Arnold, Mitchell Kozakoff, Kaitlyn Tucker, Hannah J. Brown, Rita Hippe, Courtney L. Kennedy, Lauren E. Blackman, Sanneri E. Santiago Borrés, Joe Aufmuth, Keyla Correia, Brian Martinez, Todd Z. Osborne, John A. Bowden
Florida’s water bodies are vital for drinking, agriculture, recreation, tourism, and climate resilience. The monitoring of water quality is critical for the state, with consequences for both human health and the economy. This work describes our statewide monitoring of per- and polyfluoroalkyl substances (PFAS) within a myriad of water bodies in Florida to establish a PFAS baseline and determine hotspots. Surface water samples were obtained between April 2020 and December 2021, from 2323 sites, via crowdsourcing from all 67 counties in Florida and were subsequently analyzed for 50 PFAS via high-performance liquid chromatography-tandem mass spectrometry. The mean concentration of ∑PFAS across Florida was 29 ng/L, with a maximum ∑PFAS concentration of 3048 ng/L. Moreover, 23 counties reported perfluorooctanoic acid and perfluorooctanesulfonic acid levels over the EPA’s maximum contaminant level of 4 ng/L, with 915 and 920 sites over the limit across the state, respectively. Data was organized by site coordinates, and predictive heat maps highlighting regions of concern were created. First attempts were made to identify possible PFAS pollution sources by overlaying suspect entities (airports, military installations, and wastewater treatment plants), in addition to relating data to historical pollution spill notifications (e.g., wastewater influent, effluent, and sludge).
{"title":"Statewide Surveillance and Mapping of PFAS in Florida Surface Water","authors":"Camden G. Camacho, Alexander Antonison, Allison Oldnettle, Kaylie Anne Costa, Alina S. Timshina, Heather Ditz, Jake T. Thompson, Mackenzie M. Holden, William J. Sobczak, Jack Arnold, Mitchell Kozakoff, Kaitlyn Tucker, Hannah J. Brown, Rita Hippe, Courtney L. Kennedy, Lauren E. Blackman, Sanneri E. Santiago Borrés, Joe Aufmuth, Keyla Correia, Brian Martinez, Todd Z. Osborne, John A. Bowden","doi":"10.1021/acsestwater.4c00272","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00272","url":null,"abstract":"Florida’s water bodies are vital for drinking, agriculture, recreation, tourism, and climate resilience. The monitoring of water quality is critical for the state, with consequences for both human health and the economy. This work describes our statewide monitoring of per- and polyfluoroalkyl substances (PFAS) within a myriad of water bodies in Florida to establish a PFAS baseline and determine hotspots. Surface water samples were obtained between April 2020 and December 2021, from 2323 sites, via crowdsourcing from all 67 counties in Florida and were subsequently analyzed for 50 PFAS via high-performance liquid chromatography-tandem mass spectrometry. The mean concentration of ∑PFAS across Florida was 29 ng/L, with a maximum ∑PFAS concentration of 3048 ng/L. Moreover, 23 counties reported perfluorooctanoic acid and perfluorooctanesulfonic acid levels over the EPA’s maximum contaminant level of 4 ng/L, with 915 and 920 sites over the limit across the state, respectively. Data was organized by site coordinates, and predictive heat maps highlighting regions of concern were created. First attempts were made to identify possible PFAS pollution sources by overlaying suspect entities (airports, military installations, and wastewater treatment plants), in addition to relating data to historical pollution spill notifications (e.g., wastewater influent, effluent, and sludge).","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-16DOI: 10.1021/acsestwater.4c00366
Mak Sithirith, Dok Doma, Sok Sao, Mak Bunthoeurn
The livelihood framework is an essential concept in the development theory. Livelihoods vary among places, cultures, religions, and ethnic groups. A bulk of the literature discusses the livelihoods, but many focus on land-based livelihood frameworks, and a few look into the water-based livelihood system. The increased use of water for increased development and climate change has affected the livelihoods of millions of people. This study examines the water-based livelihood system and how it has been affected by increased development pressure and climate change. In answering this question, the study undertakes the reviews of literature and the case studies of livelihoods in Tonle Sap Lake (TSL). It concludes that the flood pulse of TSL shapes three categories of communities and their livelihoods and assets. Hydropower operations and climate change have altered the flows, volumes, inundation, productivity, and livelihoods. The structures and processes at national, regional, and global levels have influenced the livelihoods and governance of TSL. Further, the regional development programs and cooperation frameworks have impacted the structures and processes, the hydrological regimes, and the livelihoods of local people. These changes have made local communities unable to adapt and resilient to these changes and have forcibly transformed them to resort to nonfishing livelihoods, including agriculture and migration.
{"title":"Analyzing Water-Based Livelihoods in the Mekong River Basin: A Livelihood Framework of the Tonle Sap","authors":"Mak Sithirith, Dok Doma, Sok Sao, Mak Bunthoeurn","doi":"10.1021/acsestwater.4c00366","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00366","url":null,"abstract":"The livelihood framework is an essential concept in the development theory. Livelihoods vary among places, cultures, religions, and ethnic groups. A bulk of the literature discusses the livelihoods, but many focus on land-based livelihood frameworks, and a few look into the water-based livelihood system. The increased use of water for increased development and climate change has affected the livelihoods of millions of people. This study examines the water-based livelihood system and how it has been affected by increased development pressure and climate change. In answering this question, the study undertakes the reviews of literature and the case studies of livelihoods in Tonle Sap Lake (TSL). It concludes that the flood pulse of TSL shapes three categories of communities and their livelihoods and assets. Hydropower operations and climate change have altered the flows, volumes, inundation, productivity, and livelihoods. The structures and processes at national, regional, and global levels have influenced the livelihoods and governance of TSL. Further, the regional development programs and cooperation frameworks have impacted the structures and processes, the hydrological regimes, and the livelihoods of local people. These changes have made local communities unable to adapt and resilient to these changes and have forcibly transformed them to resort to nonfishing livelihoods, including agriculture and migration.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-16DOI: 10.1021/acsestwater.4c00288
Emily E. Woodward, Lisa A. Senior, Jacob A. Fleck, Larry B. Barber, Angela M. Hansen, Joseph W. Duris
Understanding per- and polyfluoroalkyl substances (PFAS) mass distribution in surface and groundwater systems can support source prioritization, load reduction, and water management. Thirteen sites within an urban catchment were sampled utilizing a time-of-travel sampling approach to minimize the influence of subdaily fluctuations in mass from PFAS point sources and to quantify PFAS and ancillary chemical loads from various PFAS sources. A larger increase in perfluoroalkyl sulfonate (PFSA) loads (8 to 11 μg/s, up to 618%) than in perfluoroalkyl carboxylate (PFCA) loads (no change to 3.4 μg/s, up to 122%) was observed at sites below tributaries influenced by military bases with known groundwater discharge. Point discharges from two sewage treatment plants (STPs) resulted in increases in PFCA and PFSA loads that were similar (6 and 10 μg/s respectively) below the first STP and greater for PFCA compared to PFSA loads (23 and 13 μg/s respectively) below the second STP. Overall, percent increases in total PFAS load ranged from 20 to 277% for military base inputs and 44 to 77% for STP inputs. A focus catchment that represents only 14% (76.9 km2) of the drainage area at the most downstream site (544 km2) accounted for about 70% of PFSA and 40% of PFCA loads observed at the most downstream site. Results show that by using a time-of-travel sampling approach in mixed, urban settings with several PFAS sources, it is possible to quantify stream loads from individual PFAS sources, thereby improving source attribution and providing actionable data for water-resource managers.
{"title":"Using a Time-of-Travel Sampling Approach to Quantify Per- and Polyfluoroalkyl Substances (PFAS) Stream Loading and Source Inputs in a Mixed-Source, Urban Catchment","authors":"Emily E. Woodward, Lisa A. Senior, Jacob A. Fleck, Larry B. Barber, Angela M. Hansen, Joseph W. Duris","doi":"10.1021/acsestwater.4c00288","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00288","url":null,"abstract":"Understanding per- and polyfluoroalkyl substances (PFAS) mass distribution in surface and groundwater systems can support source prioritization, load reduction, and water management. Thirteen sites within an urban catchment were sampled utilizing a time-of-travel sampling approach to minimize the influence of subdaily fluctuations in mass from PFAS point sources and to quantify PFAS and ancillary chemical loads from various PFAS sources. A larger increase in perfluoroalkyl sulfonate (PFSA) loads (8 to 11 μg/s, up to 618%) than in perfluoroalkyl carboxylate (PFCA) loads (no change to 3.4 μg/s, up to 122%) was observed at sites below tributaries influenced by military bases with known groundwater discharge. Point discharges from two sewage treatment plants (STPs) resulted in increases in PFCA and PFSA loads that were similar (6 and 10 μg/s respectively) below the first STP and greater for PFCA compared to PFSA loads (23 and 13 μg/s respectively) below the second STP. Overall, percent increases in total PFAS load ranged from 20 to 277% for military base inputs and 44 to 77% for STP inputs. A focus catchment that represents only 14% (76.9 km<sup>2</sup>) of the drainage area at the most downstream site (544 km<sup>2</sup>) accounted for about 70% of PFSA and 40% of PFCA loads observed at the most downstream site. Results show that by using a time-of-travel sampling approach in mixed, urban settings with several PFAS sources, it is possible to quantify stream loads from individual PFAS sources, thereby improving source attribution and providing actionable data for water-resource managers.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-13DOI: 10.1021/acsestwater.4c00468
Athmakuri Tharak, Bodapati Asritha, S. Venkata Mohan
The global outbreak of SARS-CoV-2/COVID-19 has significantly affected public health and healthcare systems, highlighting the urgent need for fast and sensitive COVID-19 detection methods. In this study, an electrochemical setup utilizing bare electrodes was developed to detect viral RNA in real-time samples. Initially, individual nucleotides (adenosine, guanosine, and cytidine) were analyzed at varying concentrations to predict the detection sensitivity of cell. Subsequently, different concentrations of a synthetic COVID-19 sample containing the E-gene were analysed, and changes in electrochemical current were detected with a linear relationship between E-gene copies and reduction peak current intensity. This electrochemical setup capability was further validated by detecting the viral genome in wastewater, with a distinct electrochemical signatures. Especially, the electrochemical system demonstrated nearly 99% accuracy in distinguishing between positive and negative samples, depicting high sensitivity and precision for detecting COVID-19 and its variants. A peak voltage shift in fast-scan cyclic voltammograms was observed for B.1.1 and B.1.1.7 (0.12 to 0.15 V) and for B.1.1.5 and B.1.1.6 variants (0.06 to 0.08 V), indicating a viable approach for rapid detection of COVID-19 and its variants. This electrochemical sensor-based technology could enhance pathogen detection capability in sewage and improve environmental health monitoring from one health perspective.
{"title":"Electrochemical Signatures as a Diagnostic Tool for SARS-CoV-2 and Its Variant Detection in Real-Time Wastewater Samples","authors":"Athmakuri Tharak, Bodapati Asritha, S. Venkata Mohan","doi":"10.1021/acsestwater.4c00468","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00468","url":null,"abstract":"The global outbreak of SARS-CoV-2/COVID-19 has significantly affected public health and healthcare systems, highlighting the urgent need for fast and sensitive COVID-19 detection methods. In this study, an electrochemical setup utilizing bare electrodes was developed to detect viral RNA in real-time samples. Initially, individual nucleotides (adenosine, guanosine, and cytidine) were analyzed at varying concentrations to predict the detection sensitivity of cell. Subsequently, different concentrations of a synthetic COVID-19 sample containing the E-gene were analysed, and changes in electrochemical current were detected with a linear relationship between E-gene copies and reduction peak current intensity. This electrochemical setup capability was further validated by detecting the viral genome in wastewater, with a distinct electrochemical signatures. Especially, the electrochemical system demonstrated nearly 99% accuracy in distinguishing between positive and negative samples, depicting high sensitivity and precision for detecting COVID-19 and its variants. A peak voltage shift in fast-scan cyclic voltammograms was observed for B.1.1 and B.1.1.7 (0.12 to 0.15 V) and for B.1.1.5 and B.1.1.6 variants (0.06 to 0.08 V), indicating a viable approach for rapid detection of COVID-19 and its variants. This electrochemical sensor-based technology could enhance pathogen detection capability in sewage and improve environmental health monitoring from one health perspective.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：