Environmental Science: Water Research & Technology最新文献

{"title":"Efficacy and mechanism of the artificial sweetener saccharin degradation by thermally activated persulfate in aquatic environments†","authors":"Webber Wei-Po Lai and Chia-Ming Chang","doi":"10.1039/D4EW00357H","DOIUrl":"10.1039/D4EW00357H","url":null,"abstract":"<p >Artificial sweeteners, which potentially pose threats to ecosystems, are prevalent emerging contaminants in aquatic environments. This study explored the efficacy and mechanism underlying the degradation of saccharin by thermally activated persulfate treatment (thermal/persulfate) for the first time. Saccharin degradation followed pseudo-first-order kinetics, with a <em>k</em><small>_obs</small> value of 0.023 min<small>⁻¹</small> under the following conditions: [saccharin]<small>₀</small> = 5 mg L<small>⁻¹</small>, [persulfate]<small>₀</small> = 100 mg L<small>⁻¹</small>, temperature = 70 °C and solution pH = 7.0. Optimal saccharin degradation occurred under neutral and weakly acidic pH conditions (pH 7 and 5), and the calculated apparent activation energy of saccharin was 113.3 kJ mol<small>⁻¹</small>. The results from the scavenger experiments and electron paramagnetic resonance identification revealed that SO<small>₄</small>˙<small>⁻</small> and ·OH were the predominant radical species involved in saccharin degradation, with ·OH likely playing the major role. HCO<small>₃</small><small>⁻</small>, NO<small>₃</small><small>⁻</small>, and dissolved organic matter competed with saccharin for free radicals, decreasing the saccharin degradation rate; however, Cl<small>⁻</small> had a positive effect. Saccharin degradation involved monohydroxylation and dihydroxylation and produced TP1 and TP2, respectively. During treatment, 35% TOC reduction was achieved, and the Microtox® toxicity initially increased and then decreased, suggesting that saccharin and its transformation byproducts undergo mineralization and detoxification. The saccharin degradation rate was lower in actual water matrices than in deionized water. In conclusion, this work comprehensively investigated the degradation of saccharin by thermally activated persulfate treatment for future applications in water/wastewater treatment.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613967","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}

{"title":"Efficient and effective removal of toluene from aqueous solution using MIL-100(Fe)†","authors":"Catalina V. Flores, Juan L. Obeso, Herlys Viltres, Ricardo A. Peralta, Ilich A. Ibarra and Carolina Leyva","doi":"10.1039/D4EW00503A","DOIUrl":"10.1039/D4EW00503A","url":null,"abstract":"<p >The MIL-100(Fe) was employed for the remediation of toluene-contaminated water. The MIL-100(Fe) samples synthesised for this work exhibit high thermal (300 °C) and chemical (pH range 2–10) stability. Adsorption kinetics and isotherms were fitted to the Elovich and Temkin models. The pH of the aqueous sample containing Toluene impacted the adsorption capacity of MIL-100(Fe) through modulation of the MOF ζ potential. As a result, we concluded that MIL-100(Fe) is most effective at adsorbing toluene in the 6–10 pH range, a finding that underscores its potential in water treatment. The maximum Langmuir adsorption capacity of 318.48 mg g<small>⁻¹</small> was determined. MIL-100(Fe) showed excellent adsorption–desorption performance and stability; hence, it can be used repeatedly without losing toluene adsorption capacity. FT-IR spectra suggest that π–π interactions serve a crucial role during toluene adsorption, further confirming the effectiveness of MIL-100 (Fe) in water treatment.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ew/d4ew00503a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Versatile, flexible rice starch–graphene oxide bio-nanocomposites†","authors":"Prathmesh Bhadane and Abhijit Mishra","doi":"10.1039/D4EW00419A","DOIUrl":"10.1039/D4EW00419A","url":null,"abstract":"<p >In light of the pressing challenge of global plastic and water pollution, this study seeks a single solution by exploring the remarkable potential of rice starch (RS)–graphene oxide (GO) bio-nanocomposite films. RS–GO composite films were prepared with varying GO concentrations. As the GO weight percentage was increased from 0 wt% to 1 wt% of starch, the ultimate tensile strength of the composite was seen to increase by 438%, whereas a marginal decrease of 29% in elongation was observed. Reinforcement of GO into the starch film also helped to enhance the melting temperature because of the strong hydrogen bond formation between RS and GO sheets. Apart from the enhanced mechanical and thermal stability of the prepared composite films, they also exhibited antibacterial properties against both Gram-positive and Gram-negative bacterial strains, encouraging their use in food packaging and storage industries. In addition, the use of RS–GO biocomposites as adsorbent materials for lead removal from wastewater was also explored. As the GO concentration was increased in the composite film, the Pb(<small>II</small>) ion removal efficiency (RE) also increased, with a maximum RE of 99% observed for 5 wt% GO film from 10 ppm Pb(<small>II</small>) water solution. In conclusion, the ability of RS–GO bio-nanocomposites to address plastic and water pollution adds to their value as eco-friendly materials.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613864","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}

{"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 and Shaohua Sun","doi":"10.1039/D4EW00198B","DOIUrl":"10.1039/D4EW00198B","url":null,"abstract":"<p >Perfluoroalkyl acids (PFAAs) such as perfluorooctanoic acid (PFOA) have been referred to as “forever chemicals” and are toxic and bioaccumulative. Previous studies have indicated that the defluorination of PFOA is incomplete by various advanced reductive processes. In this study, we proposed combining sulfite (SO<small>₃</small><small>²⁻</small>) with iodide (I<small>⁻</small>) for the advanced reduction 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 electrons (e<small>_aq</small><small>⁻</small>) and VUV photolysis are major contributors to PFOA removal. The VUV/SO<small>₃</small><small>²⁻</small>/I<small>⁻</small> system was superior to UV/SO<small>₃</small><small>²⁻</small>/I<small>⁻</small> for PFOA decomposition with a synergistic factor of 1.36 and a higher e<small>_aq</small><small>⁻</small> yield. The optimal dosage of I<small>⁻</small> could be reduced by half owing to the stronger absorption coefficient under VUV radiation. HCO<small>₃</small><small>⁻</small>, Cu<small>²⁺</small>, and humic acid could inhibit the decomposition of PFOA. Fe<small>³⁺</small> and SO<small>₄</small><small>²⁻</small> had slight and negligible effects on the performance of the VUV/SO<small>₃</small><small>²⁻</small>/I<small>⁻</small> process, respectively. We determined the most active sites for nucleophilic attack by utilizing the Fukui function indices of PFOA anions using 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 for the environmental remediation of PFOA.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5,"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}

{"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 and Ku-Fan Chen","doi":"10.1039/D4EW00342J","DOIUrl":"10.1039/D4EW00342J","url":null,"abstract":"<p >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 (<em>Zizania latifolia</em>) husk-derived biochar (WBC) for the treatment of copper-contaminated irrigation water and soil amendment. The BET-SSA for WBC that is produced at 600 °C is 192 m<small>²</small> g<small>⁻¹</small> and the pore volume is 0.174 cc g<small>⁻¹</small>. The FTIR spectrum of WBC exhibits several functional groups, such as phosphate, carboxylate (–COO), or aromatic (C<img>C) that can contribute to biochar alkalinity. The point of zero charge (pH<small>_PZC</small>) 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 the Langmuir isotherm, which demonstrates that chemisorption and monolayer adsorption are the dominant mechanisms for copper removal. The maximum Cu<small>²⁺</small> adsorption capacity of WBC is 144.9 mg g<small>⁻¹</small>, 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.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5,"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}

{"title":"Hydrothermal metal recovery of metal-contaminated wastewater with forest residue: a zero waste discharge process†","authors":"Pankaj Kumar and Sivamohan N. Reddy","doi":"10.1039/D4EW00229F","DOIUrl":"10.1039/D4EW00229F","url":null,"abstract":"<p >Hydrothermal technology emerges as a cutting-edge approach for utilizing liquid effluent and waste biomass into valuable products. Simulated zinc metal effluent (Zn-1758 ppm) and real zinc electroplating effluent (Zn-765 ppm and Cr-506 ppm in high concentration) with pine needles as an adsorbent, aiming for zero waste discharge were investigated. A comprehensive study was performed to analyze the impact of several critical parameters, such as temperature (100–600 °C), time (0–60 min), and biomass to 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. Under operating conditions of 400 °C, 30 minutes, and a biomass-to-effluent ratio of 1 : 100 utilizing pine needle-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<small>⁻¹</small> of the carbon composite. Under similar operating conditions with pine needles and simulated zinc metal effluent, a maximum metal loading of 623.3 mg g<small>⁻¹</small> of carbon composite was achieved. The generated carbon composite has nanometals with a quasi-spherical morphology and a significant surface area (max: 221.1 m<small>²</small> g<small>⁻¹</small>), rendering it suitable for fabricating sensors and energy storage devices.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5,"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}

{"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}

{"title":"Outstanding Reviewers for Environmental Science: Water Research & Technology in 2023","authors":"","doi":"10.1039/D4EW90019G","DOIUrl":"10.1039/D4EW90019G","url":null,"abstract":"<p >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.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5,"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}

{"title":"Graphene oxide-based probe for detecting deltamethrin and emamectin benzoate pesticides in agricultural run-off†","authors":"Suryyia Manzoor, Muhammad Hayat, Hina Raza, Noureddine Elboughdiri, Muhammad Imran Khan, Zeeshan Ali, Ayesha Javed, Nadeem Raza, Fahad Abdulaziz and Abdallah Shanableh","doi":"10.1039/D4EW00328D","DOIUrl":"10.1039/D4EW00328D","url":null,"abstract":"<p >Insecticides adversely affect aquatic ecosystems due to prolonged exposure, persistent nature, and bioaccumulation. Deltamethrin and emamectin benzoate are pesticides that can enter water resources <em>via</em> fruits and vegetables, causing severe concerns to living organisms. This study focuses on fabricating a probe for the 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. In this study, we investigated the effect of different parameters (time, pH, and temperature) on the efficacy of the sorbent using response surface methodology (central composite design). The sorbent exhibited high binding capacities of 42 mg g<small>⁻¹</small> and 27 mg g<small>⁻¹</small> for deltamethrin and emamectin benzoate, respectively. Percentage recoveries were 93.3% and 94.2% for deltamethrin and emamectin benzoate, respectively. The selective detection of deltamethrin and emamectin benzoate from agricultural runoff was confirmed by real-sample analysis using high-performance liquid chromatography.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5,"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}

{"title":"First report of components responsible for odor sensation from a vertical flow constructed wetland treating combined sewer overflow","authors":"Ismael L. Vera-Puerto, Shrabana Sarkar, Gianfranco Moris, Hugo Valdés, Marco Quiroz, Juan López, Francisco Encina, Pascal Molle and Carlos A. Arias","doi":"10.1039/D4EW00303A","DOIUrl":"10.1039/D4EW00303A","url":null,"abstract":"<p >The present study presents 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 a vertical flow (VF) CW, was monitored. The components responsible for odor generation—hydrogen sulphide (H<small>₂</small>S), methyl mercaptan (CH<small>₃</small>SH), ammonia (NH<small>₃</small>), 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 H<small>₂</small>S, CH<small>₃</small>SH and NH<small>₃</small> 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.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5,"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}