Environmental Science: Water Research & Technology最新文献

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Enhanced removal of perfluorooctanoic acid by VUV/sulfite/iodide: Efficiencies, influencing factors and decomposition mechanism 紫外线/亚硫酸盐/碘化物增强了对全氟辛酸的去除:效率、影响因素和分解机制
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-08 DOI: 10.1039/d4ew00198b
Hong Liu, Ruibao Jia, Xiaodong Xin, Weilin Guo, Wei Li, Mingquan Wang, Shaohua Sun
{"title":"Enhanced removal of perfluorooctanoic acid by VUV/sulfite/iodide: Efficiencies, influencing factors and decomposition mechanism","authors":"Hong Liu, Ruibao Jia, Xiaodong Xin, Weilin Guo, Wei Li, Mingquan Wang, Shaohua Sun","doi":"10.1039/d4ew00198b","DOIUrl":"https://doi.org/10.1039/d4ew00198b","url":null,"abstract":"Perfluoroalkyl acids (PFOA) have been referred to as “forever chemicals”, and are toxic and bioaccumulative. Previous studies indicated that the defluorination of PFOA is incomplete by various advanced reductive processes. In this study, we proposed to combine sulfite (SO32-) with iodide (I-) for advanced reduction processes of PFOA under vacuum ultraviolet (VUV) radiation. The degradation and defluorination ratios of PFOA reached 100% within 30 min, and 99.2% within 6 h, respectively. Hydrated electron (eaq-) and VUV photolysis occupied major contributors to PFOA removal. The VUV/SO32-/I- was superior to the UV/SO32-/I- for PFOA decomposition with a synergistic factor of 1.36 and eaq- of higher yield. The optimal dosage of I- has been reduced by half owing to a stronger absorption coefficient under VUV radiation. HCO3-, Cu2+, and humic acid presented inhibition on the decomposition. Fe3+ and SO42- had slight and negligible effects on the performance of the VUV/SO32-/I- process, respectively. We attained the most active sites of nucleophilic attack utilizing Fukui function indices of PFOA anion by density functional theory (DFT) calculations. C7 polyfluorinated carboxylate esters, short-chain hydrogen-containing, and sulfonated intermediates were identified in PFOA degradation for the first time in the study. This study provides a feasible approach to environmental remediation of PFOA.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577062","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}
引用次数: 0
The application of water bamboo (Zizania latifolia) husk-derived biochar for copper-contaminated irrigation water treatment and soil amendment 水竹(Zizania latifolia)壳衍生生物炭在铜污染灌溉水处理和土壤改良中的应用
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-08 DOI: 10.1039/d4ew00342j
Thi-Manh Nguyen, Hung-Hsiang Chen, Chih-Chi Yang, Yung-Pin Tsai, Ming-Yu Kuo, Yi-Tang Liao, Yu-Chen Chang, Ku-Fan Chen
{"title":"The application of water bamboo (Zizania latifolia) husk-derived biochar for copper-contaminated irrigation water treatment and soil amendment","authors":"Thi-Manh Nguyen, Hung-Hsiang Chen, Chih-Chi Yang, Yung-Pin Tsai, Ming-Yu Kuo, Yi-Tang Liao, Yu-Chen Chang, Ku-Fan Chen","doi":"10.1039/d4ew00342j","DOIUrl":"https://doi.org/10.1039/d4ew00342j","url":null,"abstract":"In Taiwan, farmlands are polluted with metals mainly caused by irrigation water and sediments in irrigation channels. Copper (Cu) presents a major challenge in Taiwan's agricultural lands. This study investigates the potential of utilizing water bamboo (Zizania latifolia) husk-derived biochar (WBC) for the treatment of copper-contaminated irrigation water and soil amendment. BET-SSA for WBC that is produced at 600oC is 192 m2/g and pore volume is 0.174 cc/g. The FTIR spectrum of WBC exhibits several functional groups, such as phosphate, carboxylate (-COO), or aromatic (C=C) that can contribute to biochar alkalinity. The point of zero charge (pHPZC) of WBC is determined to be 2.7. The optimum adsorption of copper by WBC occurs at pH 5. Copper adsorption by WBC fits well with pseudo-second-order kinetics and Langmuir isotherm, which demonstrates that chemisorption and monolayer adsorption are the dominant mechanisms for copper removal. The maximum Cu2+ adsorption capacity of WBC is 144.9 mg/g, which is much higher than those of many existing reports. The addition of 1 to 5% (wt/wt) WBC neutralizes acidic soil pH effectively, making it suitable for water bamboo cultivation.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577108","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}
引用次数: 0
Hydrothermal metal recovery of metal-contaminated wastewater with forest residue: A zero waste discharge process 利用森林残渣对受金属污染的废水进行水热金属回收:零废物排放工艺
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-05 DOI: 10.1039/d4ew00229f
Pankaj Kumar, Sivamohan N. Reddy
{"title":"Hydrothermal metal recovery of metal-contaminated wastewater with forest residue: A zero waste discharge process","authors":"Pankaj Kumar, Sivamohan N. Reddy","doi":"10.1039/d4ew00229f","DOIUrl":"https://doi.org/10.1039/d4ew00229f","url":null,"abstract":"Hydrothermal technology emerges as a cutting-edge approach for utilizing liquid effluent and waste biomass into valuable products. The simulated zinc metal effluent (Zn-1758 ppm) and real zinc electroplating effluent (Zn-765 ppm and Cr-506 ppm in major concentration) with pine needles as an adsorbent, aiming for zero waste discharge were performed. A comprehensive study was done to analyze the impact of several critical parameters, such as temperature (100-600 °C), time (0-60 min), and biomass to a simulated metal effluent ratio (1:4 to 1:10), on metal recovery from metal-contaminated wastewater. The metal ions in the effluent are bound to the carbon matrix and reduced to lower valence metal oxide or pure metal during the hydrothermal process, later recovered as a metal-carbon composite. Parameters such as temperature and time positively impact the recovery of metal ions from wastewater. At operating conditions of 400 °C, 30 minutes, and a biomass-to-effluent ratio of 1:100 utilizing pine needles infused real zinc electroplating effluent, a recovery exceeding 99.9 % of metal ions has been attained, concurrently yielding a metal loading of 303.4 mg.g-1 of the carbon composite. At similar operating conditions with pine needles and simulated zinc metal effluent, the maximum metal loading of 623.3 mg.g-1 of carbon composite was achieved. The generated carbon composite exhibits nanometals with quasi-spherical morphology and a significant surface area (max: 221.1 m2.g-1), rendering it suitable for fabricating sensors and energy storage devices.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577064","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}
引用次数: 0
Beyond Campus Borders: Wastewater Surveillance Sheds Light on University COVID-19 Interventions and their Community Impact 超越校园边界:废水监测揭示大学 COVID-19 干预措施及其对社区的影响
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-05 DOI: 10.1039/d4ew00168k
David G Lisboa, Devrim Kaya, Michael Harry, Casey A. Kanalos, Gabriel Davis, Oumaima Hachimi, Shana Jaaf, David Mickle, Dana Alegre, Katherine Carter, Steven Carrell, Mark Dasenko, Nathan Davidson, Justin Elser, Matthew Geniza, Anne-Marie Girard, Brent Kronmiller, Matthew Peterson, Elizabeth Zepeda, Christine Kelly, Tyler Radniecki
{"title":"Beyond Campus Borders: Wastewater Surveillance Sheds Light on University COVID-19 Interventions and their Community Impact","authors":"David G Lisboa, Devrim Kaya, Michael Harry, Casey A. Kanalos, Gabriel Davis, Oumaima Hachimi, Shana Jaaf, David Mickle, Dana Alegre, Katherine Carter, Steven Carrell, Mark Dasenko, Nathan Davidson, Justin Elser, Matthew Geniza, Anne-Marie Girard, Brent Kronmiller, Matthew Peterson, Elizabeth Zepeda, Christine Kelly, Tyler Radniecki","doi":"10.1039/d4ew00168k","DOIUrl":"https://doi.org/10.1039/d4ew00168k","url":null,"abstract":"The evaluation of COVID-19 policy effectiveness on university campuses, particularly in mitigating spread to neighboring cities (i.e., \"campus spill-over\"), is challenging due to asymptomatic transmission, biases in case reporting, and spatial case reporting limitations. Wastewater surveillance offers a less biased and more spatially precise alternative to conventional clinical surveillance, thus providing reliable data for university COVID-19 policy evaluation. Wastewater surveillance data spanning the academic terms from Fall 2020 through Spring 2022 was used to evaluate the impact of university COVID-19 policies. During the campus closure to external visitors, campus viral concentrations and variant compositions were dissimilar from those of the host and neighboring cities (MAPE = 0.25 + 0.14; Bray-Curtis = 0.68 + 0.1, respectively), indicating relative isolation of the campus from its surroundings. Upon the campus reopening to visitors, the viral concentrations and variant compositions matched more closely with the host and neighboring cities (MAPE = 0.21 + 0.1; Bray-Curtis = 0.14 + 0.08, respectively). Furthermore, post-lifting of campus and state mask mandates, the campus, host and neighboring city viral concentrations and variant compositions became indistinguishable (MAPE = 0.06 + 0.02; Bray-Curtis = 0.07 + 0.05, respectively). This data suggests that university COVID-19 policies effectively prevented campus-spill over, with no significant contribution to COVID-19 spread into the surrounding communities. Conversely, it was the surrounding communities that led to the spread of COVID-19 onto the campus. Therefore, wastewater surveillance proves instrumental in monitoring COVID-19 trends in surrounding areas, aiding in predicting the impact of easing campus restrictions on campus health.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577063","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}
引用次数: 0
Outstanding Reviewers for Environmental Science: Water Research & Technology in 2023 环境科学》杰出评审员:2023 年水研究与技术
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-05 DOI: 10.1039/d4ew90019g
{"title":"Outstanding Reviewers for Environmental Science: Water Research & Technology in 2023","authors":"","doi":"10.1039/d4ew90019g","DOIUrl":"https://doi.org/10.1039/d4ew90019g","url":null,"abstract":"We would like to take this opportunity to thank all of <em>Environmental Science: Water Research &amp; Technology</em>'s reviewers for helping to preserve quality and integrity in chemical science literature. We would also like to highlight the Outstanding Reviewers for <em>Environmental Science: Water Research &amp; Technology</em> in 2023.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577202","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}
引用次数: 0
Graphene oxide-based probe for detecting Deltamethrin and Emamectin Benzoate Pesticides in Agricultural Run-off 基于氧化石墨烯的探针用于检测农业径流中的溴氰菊酯和苯甲酸戊酯杀虫剂
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-04 DOI: 10.1039/d4ew00328d
Suryyia Manzoor, Muhammad Hayat, Hina Raza, Elboughdiri Noureddine, Muhammad Imran Khan, Zeeshan Ali, Ayesha Javed, Nadeem Raza, Fahad Abdulaziz, Abdallah Shanableh
{"title":"Graphene oxide-based probe for detecting Deltamethrin and Emamectin Benzoate Pesticides in Agricultural Run-off","authors":"Suryyia Manzoor, Muhammad Hayat, Hina Raza, Elboughdiri Noureddine, Muhammad Imran Khan, Zeeshan Ali, Ayesha Javed, Nadeem Raza, Fahad Abdulaziz, Abdallah Shanableh","doi":"10.1039/d4ew00328d","DOIUrl":"https://doi.org/10.1039/d4ew00328d","url":null,"abstract":"Insecticides adversely affect aquatic ecosystems due to their prolonged exposure, persistent nature, and bioaccumulation. Deltamethrin and emamectin benzoate are two such pesticides that enter water resources due to excessive use on fruits and vegetables causing serious concerns to living organisms. Here, we report the fabrication of a probe for selective solid-phase microextraction of targeted pesticides from agricultural runoff. The sorbent was designed using the novel dual-template graphene oxide-based molecularly imprinted organically modified silica. The study investigated effect of different parameters (time, pH, and temperature) on the efficacy of sorbent using response surface methodology. The sorbent presented high binding capacities of 42 mg g-1 and 27 mg g-1 for deltamethrin and emamectin benzoate respectively. The limit of detection and quantification for emamectin benzoate were 0.31 and 0.59 µg L-1, and for deltamethrin were 0.41 and 0.92 µg L-1. Sorbent’s kinetic studies suggested fitting of a pseudo-first-order model, with emamectin benzoate and deltamethrin having the lowest χ2values (0.72 and 1.69 respectively) and highest R2 (0.99). While studying adsorption isotherms, the Freundlich model was found to possess the best fit for both templates. Percentage recoveries were 93.3 and 94.2% for deltamethrin and emamectin benzoate, respectively. The selective detection of deltamethrin and emamectin benzoate from agricultural run-off was confirmed by real-sample analysis using high-performance liquid chromatography.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548913","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}
引用次数: 0
First report of components responsible for odor sensation from a vertical flow constructed wetland treating combined sewer overflow 首次报告垂直流人工湿地处理联合污水溢流时产生臭味的成分
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-02 DOI: 10.1039/d4ew00303a
Ismael Vera-Puerto, Shrabana Sarkar, Gianfranco Moris, Hugo Valdes, Marco Quiroz, Juan López, Francisco Encina, Pascal Molle, Carlos A. Arias
{"title":"First report of components responsible for odor sensation from a vertical flow constructed wetland treating combined sewer overflow","authors":"Ismael Vera-Puerto, Shrabana Sarkar, Gianfranco Moris, Hugo Valdes, Marco Quiroz, Juan López, Francisco Encina, Pascal Molle, Carlos A. Arias","doi":"10.1039/d4ew00303a","DOIUrl":"https://doi.org/10.1039/d4ew00303a","url":null,"abstract":"The present study represents the first attempt to demonstrate the online monitoring of components responsible for odor sensation from a constructed wetland (CW) utilized in treating combined sewer overflow (CSO). An experimental CSO treatment plant located in the south of Chile, employing vertical flow (VF) CW, was monitored. The components responsible for odor generation—hydrogen sulphide (H2S), methyl mercaptens (CH3SH) ammonia (NH3) and volatile organic compounds (VOCs) — were tracked for 27 days. During the study, the VF CW underwent two operational phases with CSO loadings, each lasting four days. The findings reveal minimal generation of H2S, CH3SH and NH3 from the VF CW during the monitoring period, regardless of its operational status or the time of the day. However, VOCs exhibited different behavior. VOCs emerged as a potential contributor to odor sensation, with elevated levels observed during specific morning hours, which intensified when the VF CW was not operational. Nevertheless, the results suggest that the VF CW treatment has a limited impact on the production of gases responsible for odor sensation. This is complementary to previous studies focusing on water quality assessment, highlighting the potential of this technology for sustainable CSO treating.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525871","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}
引用次数: 0
Per- and polyfluoroalkyl substance separation by NF and RO membranes: a critical evaluation of advances and future perspectives 用 NF 和 RO 膜分离全氟和多氟烷基物质:对进展和未来前景的严格评估
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-02 DOI: 10.1039/d4ew00066h
Sharafat Ali, Ruonan Wang, Haiou Huang, Shunde Yin, Xianshe Feng
{"title":"Per- and polyfluoroalkyl substance separation by NF and RO membranes: a critical evaluation of advances and future perspectives","authors":"Sharafat Ali, Ruonan Wang, Haiou Huang, Shunde Yin, Xianshe Feng","doi":"10.1039/d4ew00066h","DOIUrl":"https://doi.org/10.1039/d4ew00066h","url":null,"abstract":"Per- and polyfluoroalkyl substances (PFAS), dubbed “forever chemicals”, are synthetic compounds containing strong carbon–fluorine bonds. They are widely used in various industrial processes and products, and as a result, PFAS pollution is pervasive and has led to persistent contamination of surface and groundwater sources. Due to the adverse impact of PFAS exposure on health, there have been growing concerns among the public, the scientific community, and regulatory bodies, and treating water to an adequate level is essential. Nanofiltration (NF) and reverse osmosis (RO) are two of the candidate technologies for separating PFAS from water. NF and RO systems are easy to operate and require little use of chemicals. In contrast, other water treatment technologies (<em>e.g.</em>, chemical oxidation, adsorption, ion exchange, and photocatalytic degradation) are often unsatisfactory due to slow reaction kinetics, generation and release of harmful by-products, or high operating costs. Despite the advantages of NF and RO, a concentrated residual stream is produced which contains high levels of PFAS. This concentrate, which typically accounts for 10 to 20% of the feedwater volume and is 5 to 10 times more concentrated with PFAS, must be managed or further treated appropriately to prevent environmental contamination. In this review, the NF/RO systems for the treatment of PFAS-contaminated water are discussed, focusing on the factors that affect their effectiveness and the mechanisms by which they remove PFAS. Also, advances in NF/RO membranes and systems as well as technical challenges at present are discussed along with an introduction to a total management plan for concentrated residual streams using a novel combination of NF/RO processes coupled with other state-of-the-art methods.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525875","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}
引用次数: 0
Removal of calcium from water by zeolites with gravity-driven membrane filtration for water treatment without electricity 利用沸石和重力驱动膜过滤技术去除水中的钙,实现无电水处理
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-01 DOI: 10.1039/d4ew00438h
Dowon Chae, Kwang Pyo Son, Seung Mo Kang, Joowan Lim, Hosung Lee, Jin Lee, Seungjin Lee, Pyung-Kyu Park
{"title":"Removal of calcium from water by zeolites with gravity-driven membrane filtration for water treatment without electricity","authors":"Dowon Chae, Kwang Pyo Son, Seung Mo Kang, Joowan Lim, Hosung Lee, Jin Lee, Seungjin Lee, Pyung-Kyu Park","doi":"10.1039/d4ew00438h","DOIUrl":"https://doi.org/10.1039/d4ew00438h","url":null,"abstract":"Hard water creates issues due to scaling that impacts industrial and domestic applications. Zeolite adsorption is an effective method for calcium removal. However, treated water requires additional filtration to remove suspended solids, which uses energy under traditional methods. Considering applications at sites where electricity is unavailable, this study removed calcium from water using zeolite adsorption and gravity-driven membrane (GDM) filtration. Four zeolite types were assessed: powdered (P1 and P2), bead-shaped (B) and granular (G). The properties of the zeolites significantly affected calcium removal and GDM filtration performance. Zeolites with low Si/Al ratios (high Al content) exhibited high Ca removal because negatively charged lattice sites were created by replacing Si with Al. P1 and B with Si/Al ratios of 1.40 and 1.49, respectively, exhibited a high Ca-removal efficiencies of 92.6% and 99.8%. In contrast, P2 and G with high Si/Al ratios from 4.71–5.35 showed lower removal efficiency of 29.8–43.7%. The average sizes of P1, P2, B, and G were 9.68, 5.73, 2134, and 3639 µm, respectively. At similar Si/Al ratios, smaller particles exhibited faster adsorption rates. However, as the zeolite size decreased, the GDM flux decreased. During GDM filtration after zeolite adsorption, the permeate flux of water treated with large B and G zeolites was higher than that of water treated with small P1 and P2 zeolites. Finally, the zeolites were evaluated based on three criteria: Ca removal, GDM water flux, and price, which provides useful guidance for selecting appropriate zeolites.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532154","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}
引用次数: 0
Graphitic carbon nitride-based efficient nanocomposite: a low cost and stupefying photocatalyst for the derogation of tetracycline and As3+ in wastewater 基于氮化石墨碳的高效纳米复合材料:一种用于减损废水中四环素和 As3+ 的低成本、令人目瞪口呆的光催化剂
IF 5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2024-07-01 DOI: 10.1039/d4ew00376d
Kabir Hussain Badagoppam Haroon, Varsha UshaVipinachandran, Santanu Bera, Vijay Sithaiyan, Susanta Kumar Bhunia
{"title":"Graphitic carbon nitride-based efficient nanocomposite: a low cost and stupefying photocatalyst for the derogation of tetracycline and As3+ in wastewater","authors":"Kabir Hussain Badagoppam Haroon, Varsha UshaVipinachandran, Santanu Bera, Vijay Sithaiyan, Susanta Kumar Bhunia","doi":"10.1039/d4ew00376d","DOIUrl":"https://doi.org/10.1039/d4ew00376d","url":null,"abstract":"The paucity of pure water has become a serious concern due to the rapid increase of industrialization and massive population growth. The frequent usage of colorless pollutants in our daily lives leads to an accumulation in the water bodies and cause adverse effects when consumed unknowingly. Therefore, it becomes crucial to remove these kinds of pollutants from wastewater. We report a nanocomposite comprising of silver (Ag) nanoparticles furnished on graphitic carbon nitride (CN) and employed for visible light-induced photocatalytic removal of tetracycline (TC) and As3+ as well as oil-water separation. A simple calcination, acid-etching followed by in-situ chemical reduction method was used to fabricate the binary nanocomposite namely AgECN. The resulting nanostructure showed tremendous potentiality towards TC degradation and As3+ oxidation in a short period of time. It was observed that 92 % of TC and 99 % of As3+ became derogated within 90 minutes using AgECN-3 % nanocomposite. In addition, it performed better oil-water separation efficiency. Radical scavenging study demonstrated the involvement of both superoxide radical (O2.-) and photogenerated holes (h+) towards TC degradation and As3+ oxidation. The synergistic effect of individual components in the nanocomposite exhibited outstanding separation of photogenerated charge carriers proceeding in remarkable photocatalytic activity compared to individuals.","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525870","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}
引用次数: 0
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