Hannah Groenewegen, Husein Almuhtaram and Robert C. Andrews
{"title":"Impact of chlorine and UV/H2O2 on microplastics in drinking water†","authors":"Hannah Groenewegen, Husein Almuhtaram and Robert C. Andrews","doi":"10.1039/D4EW00618F","DOIUrl":"https://doi.org/10.1039/D4EW00618F","url":null,"abstract":"<p >Limited studies to-date have assessed the impacts of disinfectants (chlorine and ultraviolet (UV)/H<small><sub>2</sub></small>O<small><sub>2</sub></small>) on microplastics (MPs), with most employing dosages and fluences that are much higher than typically applied during drinking water treatment. Formation of hydroxyl, carbonyl, and carbon–chlorine bonds on the surface of MP particles, as well as the potential for fragmentation and changes to surface roughness have been linked to an increase in toxicity. Additional knowledge regarding physicochemical changes to MPs under conditions representative of drinking water disinfection will aid our understanding of potential risk. In this study, changes to virgin low-density polyethylene (LDPE) and high-density polyethylene (HDPE) fragments (2–125 μm) were examined following exposure to 6 mg L<small><sup>−1</sup></small> free chlorine over a two-week period. Relative changes to hydroxyl, carbonyl, carbon–oxygen, and carbon–chlorine indices were determined using Attenuated Total Reflectance Fourier Transform Spectroscopy (ATR-FTIR). Following exposure, particle size distributions remained consistent, indicating that MPs did not fragment as reported in earlier studies by others. Neither polymer type nor pH level exhibited an impact on fragmentation or bond indices that was statistically significant (<em>P</em> > 0.05). These findings suggest that neither chlorination nor UV/H<small><sub>2</sub></small>O<small><sub>2</sub></small> adversely impact LDPE or HDPE.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 12","pages":" 3217-3229"},"PeriodicalIF":3.5,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679404","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}
Prashant D. Sarvalkar, Anuj S. Jagtap, Apurva S. Vadanagekar, Suhas S. Kamble, Arati P. Tibe, Arif D. Sheikh, Rajiv S. Vhatkar and Kiran Kumar K. Sharma
{"title":"Multifunctional chitosan tailored γ-aluminum oxy-hydroxide monolith aerogels for sustained environmental remediation†","authors":"Prashant D. Sarvalkar, Anuj S. Jagtap, Apurva S. Vadanagekar, Suhas S. Kamble, Arati P. Tibe, Arif D. Sheikh, Rajiv S. Vhatkar and Kiran Kumar K. Sharma","doi":"10.1039/D4EW00697F","DOIUrl":"https://doi.org/10.1039/D4EW00697F","url":null,"abstract":"<p >Recently, improving the mechanical properties of monolithic silica and alumina aerogels by incorporating polymers for various applications, particularly for adsorption, has been the focus of research. In this study, we report the modification of the high surface area γ-aluminum oxy-hydroxide (γ-AlOOH) aerogel with biopolymer chitosan having nitrogen functional groups to improve the efficiency of adsorption. The chitosan + γ-AlOOH aerogel was synthesized using the sol–gel method <em>via</em> a supercritical drying process. The monolithic chitosan–γ-AlOOH aerogel was optimized at 1% (w/w) chitosan for all aluminum precursors used. The XRD pattern of the synthesized monolithic chitosan–γ-AlOOH aerogel shows an amorphous nature, while the FTIR peaks at 1065 cm<small><sup>−1</sup></small> and 1387 cm<small><sup>−1</sup></small> indicated the presence of –OH and –NH<img> (amide) bonds. TEM images show the nanoneedle-shaped morphology of chitosan within the γ-AlOOH aerogel with specific surface area of 562.11 m<small><sup>2</sup></small> g<small><sup>−1</sup></small> and pore volume of 3.68 cc g<small><sup>−1</sup></small>. The as-synthesized monolithic chitosan–γ-AlOOH aerogel was used for the removal of azo dyes, such as methylene blue (MB) and crystal violet (CV), heavy metal ions [Pb(<small>II</small>), As(<small>III</small>)], and rare earth metals [U(<small>VI</small>)]. The maximum adsorption capacities obtained from the adsorption isotherms are 167 ± 3 mg g<small><sup>−1</sup></small> for MB, 164 ± 2 mg g<small><sup>−1</sup></small> for CV, 644 ± 5 mg g<small><sup>−1</sup></small> for U(<small>VI</small>), and 102 ± 2 mg g<small><sup>−1</sup></small> for As(<small>III</small>) at pH 7. However, at pH 7 Pb(<small>II</small>) is found to precipitate; therefore, the adsorption capacity is obtained at pH 5 with 228 ± 1 mg g<small><sup>−1</sup></small>. The recyclability of the monolithic chitosan–γ-AlOOH aerogel was 94.55% (MB), 94.48% (CV), 94.65% (Pb(<small>II</small>)), 94.8% (U(<small>VI</small>)), and 95.15% (As(<small>III</small>)). These results highlight the potential of heteroatom-rich biopolymers tailored to alumina aerogels for achieving superior multifunctional adsorption properties.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 12","pages":" 3189-3205"},"PeriodicalIF":3.5,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679403","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}
Katherine R. Kazmer, Michelle L. Ammerman, Elizabeth A. Edwards, Julie Gilbert, JoLynn P. Montgomery, Virginia M. Pierce, Jason B. Weinberg, Marisa C. Eisenberg and Krista R. Wigginton
{"title":"Respiratory human adenovirus outbreak captured in wastewater surveillance†","authors":"Katherine R. Kazmer, Michelle L. Ammerman, Elizabeth A. Edwards, Julie Gilbert, JoLynn P. Montgomery, Virginia M. Pierce, Jason B. Weinberg, Marisa C. Eisenberg and Krista R. Wigginton","doi":"10.1039/D4EW00521J","DOIUrl":"https://doi.org/10.1039/D4EW00521J","url":null,"abstract":"<p >Adenoviruses present challenges for traditional surveillance methods since there are more than 60 types that infect humans. Wastewater-based surveillance can supplement traditional surveillance methods for gastrointestinal-associated adenoviruses, but the ability to detect trends of respiratory-associated adenoviruses in wastewater remains unclear. We quantified human adenovirus type 4 (HAdV-4) in wastewater settled solids and compared wastewater measurements to clinical cases from an outbreak investigation beginning in late September 2022. The human adenovirus type 4 target was positively correlated with clinical cases (Spearman's rho = 0.5470, <em>p</em> < 0.0001) and followed a similar trend during the outbreak. We also quantified human adenovirus types 3, 7, 14, 21, 40/41, and a pan-adenovirus assay that targets all types that infect humans. The respiratory adenoviruses comprised a small fraction of the adenoviruses in wastewater and types 40/41, which typically cause gastrointestinal disease, comprised the majority of the detected adenoviruses. The efficacy of adenovirus wastewater surveillance will depend on assay specificity and the public health action available for adenovirus types.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 1","pages":" 126-135"},"PeriodicalIF":3.5,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ew/d4ew00521j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859404","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}
Stephanie L. Gora, Ben Ma, Mariana Lanzarini-Lopes, Hamed Torkzadeh, Zhe Zhao, Christian Ley Matthews, Paul Westerhoff, Karl Linden, Benoit Barbeau, Rich Simons, Graham Gagnon, Patrick Di Falco and Muhammad Salman Mohsin
{"title":"Control of biofilms with UV light: a critical review of methodologies, research gaps, and future directions","authors":"Stephanie L. Gora, Ben Ma, Mariana Lanzarini-Lopes, Hamed Torkzadeh, Zhe Zhao, Christian Ley Matthews, Paul Westerhoff, Karl Linden, Benoit Barbeau, Rich Simons, Graham Gagnon, Patrick Di Falco and Muhammad Salman Mohsin","doi":"10.1039/D4EW00506F","DOIUrl":"https://doi.org/10.1039/D4EW00506F","url":null,"abstract":"<p >The use of UV light to prevent or mitigate the development of biofilms is an area of emerging research that spans numerous industries. We reviewed 58 papers published between 1998 and 2024 reporting UV/biofilm experiments. Unlike earlier literature reviews on this topic, we included studies from many areas of practice including water, healthcare, and food safety. We focused on experimental methods and the types of information reported in different studies. Major research gaps included a lack of comparison between different approaches to biofilm growth and/or UV exposure, poor reporting of the chemical and/or optical characteristics of the biofilm growth and UV exposure media, little to no investigation into the impact(s) of support surface characteristics on treatment efficacy, few attempts to meaningfully compare the effects of different UV wavelengths on biofilms, and limited use of advanced methods to quantify and characterize of biofilms exposed to UV light. No existing studies have explored how UV light travels through biofilms or whether existing UV characterization methods can be meaningfully applied to UV/biofilm studies. The impacts of hydraulic conditions during biofilm growth and UV exposure also remain unexplored. Through this review we determined that a prescriptive standard experimental method for UV/biofilm experiments would be unable to encompass the wide range of industries and potential applications of the technology. Instead, recommendations for minimum reporting requirements were developed and examples of advanced methods to enhance future for UV/biofilm experiments were identified along with a proposed terminology framework to improve comparability between studies.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 12","pages":" 3056-3073"},"PeriodicalIF":3.5,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679240","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}
Paula B. Coelho, Gracie Fitzgerald, Kristofer Isaacson, Rasul Diop, Gouri Prabhakar, Stephanie Heffner, Akshat Verma, Jeffrey P. Youngblood, Youn Jeong Choi, Stefanie Surdyka, Samuel A. Spears, Marty D. Frisbee, Katherine R. Del Real, Lauren A. Gustafson, Ana María Núñez-Torres, Caitlin R. Proctor, Linda S. Lee, Heather D. Whitehead, Kyle Doudrick, Brock A. Harpur and Andrew J. Whelton
{"title":"Environmental and private property contamination following the Norfolk Southern chemical spill and chemical fires in Ohio†","authors":"Paula B. Coelho, Gracie Fitzgerald, Kristofer Isaacson, Rasul Diop, Gouri Prabhakar, Stephanie Heffner, Akshat Verma, Jeffrey P. Youngblood, Youn Jeong Choi, Stefanie Surdyka, Samuel A. Spears, Marty D. Frisbee, Katherine R. Del Real, Lauren A. Gustafson, Ana María Núñez-Torres, Caitlin R. Proctor, Linda S. Lee, Heather D. Whitehead, Kyle Doudrick, Brock A. Harpur and Andrew J. Whelton","doi":"10.1039/D4EW00456F","DOIUrl":"https://doi.org/10.1039/D4EW00456F","url":null,"abstract":"<p >In February 2023, a train derailment in Ohio caused a chemical spill and fires releasing contaminants into the air, soil, waterways, and buildings. The authors conducted a rapid response which included six field investigations and bench-scale experiments to understand the chemical identity, fate, and exposure pathways after the evacuation order was lifted. Multiple buildings were chemically contaminated and silicone wristband products inside a commercial building were found to have adsorbed derailment-related chemicals. The indoor air of this commercial building was found to be contaminated for 4.5 months after the derailment. Derailment chemicals were also found on building exteriors 5 weeks after the incident. Railcar chemicals were detected in the nearby creeks. Cleanup activities (sorbent pads, aerators) as well as creek hydraulic and environmental conditions influenced chemical fate in creeks. Creek mechanical aeration activities prompted VOC emission that contributed to human exposures and vapor intrusion. Atmospheric modeling revealed that the chemical plumes extended beyond the evacuation zone. Water was a consequential media associated with contaminant transport and human exposures found in the present study. Because the complexity, magnitude, and health threats posed to the community were not matched by efforts employed by the responding organizations, the population experienced continued exposures for months; workers as well as town visitors also experienced health symptoms. This study revealed unaddressed human exposure pathways. Also identified were crucial gaps requiring improved decision-making and technologies. Recommendations to better protect human health and the environment before and during a response to chemical incidents are provided.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 11","pages":" 3007-3023"},"PeriodicalIF":3.5,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ew/d4ew00456f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518315","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":"Ultraviolet radiation restrains marine biofouling during uranium extraction from seawater†","authors":"Meng Yan, Qianhong Gao and Dadong Shao","doi":"10.1039/D4EW00731J","DOIUrl":"https://doi.org/10.1039/D4EW00731J","url":null,"abstract":"<p >Marine biofouling, which is related to the survival and reproduction of marine microorganisms, seriously limits uranium (U(<small>VI</small>)) extraction from seawater. In this work, the complex and varied effect of ultraviolet (UV) light on marine biofouling was revealed. Experimental results reveal that UV irradiation can influence and alter the biosynthesis pathways of amino acid, ribonucleic acid, glycoprotein and glycolipids and control the extracellular polymeric substances (EPS) on the surface of the classic U(<small>VI</small>) extraction material poly(amidoxime) (PAO). The survival and reproduction of marine microorganisms on PAO surface can be effectively restrained by UV irradiation, and the adsorption capacities of PAO for U(<small>VI</small>) increase from ∼36.0 mg g<small><sup>−1</sup></small> to ∼56.0 mg g<small><sup>−1</sup></small> at pH 8.2 and 298 K. It results in the reduction of <em>Cyanobacteria</em>, <em>Bacteroidetes</em> and <em>Actinobacteria</em> phyla. The increased <em>Proteobacteria</em> phylum is important for the transformation of microorganisms in seawater. The change in the biological community reveals the excellent anti-biofouling effect of UV radiation in solving the marine biofouling problem during the uranium extraction task.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 12","pages":" 3230-3237"},"PeriodicalIF":3.5,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679405","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}
Xiaoran Xu, Jinquan Wan, Guanghua Wang, Qiangqiang Sun, Pengfei Ren, Qiu Li, Zhili Du, Jingyi Sun and Yan Chen
{"title":"A bibliometric analysis from 1997 to 2023 examining the research trends in eliminating taste and odor compounds from drinking water","authors":"Xiaoran Xu, Jinquan Wan, Guanghua Wang, Qiangqiang Sun, Pengfei Ren, Qiu Li, Zhili Du, Jingyi Sun and Yan Chen","doi":"10.1039/D4EW00645C","DOIUrl":"https://doi.org/10.1039/D4EW00645C","url":null,"abstract":"<p >The increasing demand for high-quality drinking water has made the elimination of taste and odor (T&O) substances from drinking water a matter of growing importance. This study offers a comprehensive overview of research advancements in T&O compound removal from drinking water, employing bibliometric tools to visually analyze pertinent literature. A combined total of 1569 articles were collected from the Web of Science Core Citation Database and China National Knowledge Infrastructure Citation Database, covering the period from 1997 to 2023. The study identified three distinct developmental stages in this field, with a notable surge in publications since 2018. Environmental and Ecology publications make up the majority of the publications in this category. Water Research (with 50 articles and an average of 10.46 citations) emerged as the most prolific journal, while the <em>Journal of Environmental Sciences</em> (with 8 articles and an average of 13.38 citations) was the most frequently cited journal. China and the United States made notable contributions to the field, with China having a total citation count of 117 and a total link strength of 16, while the USA had 74 citations and a link strength of 16. Keyword clustering analysis reveals that researchers primarily concentrate on conventional water treatment processes and physical or chemical techniques for removing T&O compounds produced by algae and the impact of by-products. Finally, we suggest the following areas for future research on T&O compounds, including precise traceability, <em>in situ</em> treatment, combined treatment, and toxicity studies of odorants and their degradation products. Overall, this bibliometric study lays the foundation for further advancements in T&O compound treatment to ensure the delivery of safe and odor-free water to the public.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 12","pages":" 3074-3089"},"PeriodicalIF":3.5,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679241","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":"Degradation of carbamazepine and sulfamethoxazole in water by dielectric barrier discharge plasma coupled with a far UV-C (222 nm) system†","authors":"Kiran Ahlawat, Ramavtar Jangra and Ram Prakash","doi":"10.1039/D4EW00564C","DOIUrl":"https://doi.org/10.1039/D4EW00564C","url":null,"abstract":"<p >Organic micropollutants (OMPs) are now frequently found in wastewater and pose a risk to human and environmental health. This study utilizes an in-house developed plasma source and KrCl* excilamp (far UV-C at 222 nm), a conventional UV (LPUV at 254 nm) lamp and the combinations of plasma with LPUV/far UV-C for the degradation of sulfamethoxazole (SMX) and carbamazepine (CBZ). At first, the concentrations of plasma-produced long-lived (such as H<small><sub>2</sub></small>O<small><sub>2</sub></small>, NO<small><sub>3</sub></small><small><sup>−</sup></small>, NO<small><sub>2</sub></small><small><sup>−</sup></small>) and short-lived (such as ·HO) reactive species have been quantified. Accordingly, the role of plasma-produced reactive species in the degradation of CBZ and SMX under UV 222 has been reported. In the case of DIW/plasma + UV 222, the complete degradation of CBZ and SMX only takes 15 and 10 minutes, respectively. Furthermore, the degradation rate considerably accelerated in TW, and CBZ and SMX completely degraded in just 12 and 8 minutes, respectively. Moreover, the degradation rate of CBZ in DIW is found to be 25 times higher when using plasma + UV 222 compared to using plasma + LPUV and 114 times higher compared to LPUV alone. This is due to the abundance of ·OH (46.7 × 10<small><sup>−8</sup></small> M s<small><sup>−1</sup></small>) generated under UV 222 from plasma-produced reactive species. The required electrical energy per order for the OMP degradation from this hybrid process is relatively low (73.38 kW h m<small><sup>−3</sup></small>), which makes it an energy-efficient approach. This study provides a fresh perspective to broaden the application of plasma coupling with UV 222 for treating wastewater containing numerous OMPs.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 12","pages":" 3122-3136"},"PeriodicalIF":3.5,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679243","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}
Yuqian He, Yanyan Ye, Mi Zhou, Linlin Yan, Yingjie Zhang, Enrico Drioli, Jun Ma, Yonggang Li and Xiquan Cheng
{"title":"F-SiO2-embedded PLA-based superhydrophobic nanofiber membrane for highly efficient membrane distillation†","authors":"Yuqian He, Yanyan Ye, Mi Zhou, Linlin Yan, Yingjie Zhang, Enrico Drioli, Jun Ma, Yonggang Li and Xiquan Cheng","doi":"10.1039/D4EW00611A","DOIUrl":"https://doi.org/10.1039/D4EW00611A","url":null,"abstract":"<p >Obtaining a superhydrophobic surface is key for constructing membrane distillation systems for desalination. Although perfluoroalkyl materials have been proven to be good candidates for membrane distillation, the lack of a friendly approach to treat waste perfluoroalkyl-based membranes has attracted significant concern. Herein, we propose a simple strategy for the preparation of superhydrophobic polylactic acid (PLA) nanofibre membranes. PLA nanofibres were coated with polydimethylsiloxane (PDMS) <em>via</em> coaxial electrostatic spinning technique, and 0.1% fluorine-modified silica (F-SiO<small><sub>2</sub></small>) nanoparticles were embedded in the nanofibres to form nanoscale projections, which can increase roughness. Results showed that the coating of the low-surface-energy material PDMS and the nanoscale projections of F-SiO<small><sub>2</sub></small> endowed the membrane with excellent superhydrophobicity. The presence of the biodegradable material PLA and only 0.1% fluorine-containing substances made the membrane environment friendly. In addition, a large-pore-size high-flux support layer could maximize transmembrane vapor transfer while a small-pore-size high-rejection selective layer could avoid brine wetting and exhibited excellent salt rejection. The flux of the membrane reached 6.87 L m<small><sup>−2</sup></small> h<small><sup>−1</sup></small> and rejection was higher than 99%. Therefore, the PPF-AS membrane, as a superhydrophobic membrane, has wide potential for application in the field of MD.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 12","pages":" 3137-3145"},"PeriodicalIF":3.5,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679412","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":"From defence to damage: the impact of seawater passivation on microbially influenced corrosion in CuNi 70/30 alloy†","authors":"M. A. Javed, W. C. Neil and S. A. Wade","doi":"10.1039/D4EW00562G","DOIUrl":"https://doi.org/10.1039/D4EW00562G","url":null,"abstract":"<p >The work examined the effect of seawater passivation on microbially influenced corrosion (MIC) of CuNi 70/30 alloy when tested with sulfate-reducing bacteria (SRB). The experiments were performed in two stages. In stage I, CuNi 70/30 samples were passivated in natural filtered and pasteurized seawater for 35 days. Electrochemical tests showed that passivated samples had improved corrosion resistance compared to non-passivated samples, as demonstrated by higher linear polarization resistance, lower corrosion current densities, and higher charge transfer resistance values. In stage II, the MIC performance of 35 days seawater passivated samples was investigated and compared with control non-passivated samples. Samples were immersed in modified Baar's medium with and without SRB for 28 days under anaerobic conditions. The results showed that the passivated samples experience greater MIC susceptibility as compared to the non-passivated samples. This unexpected susceptibility is attributed to the existence of a copper oxide film on the surface of the passivated samples, which converted into copper sulfide film in the presence of SRB, leading to film cracking driven by structural changes at the oxide/sulfide film interface. The defective and porous surface film significantly contributes to the accelerated corrosive attack of the exposed base metal.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 11","pages":" 2929-2945"},"PeriodicalIF":3.5,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518300","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}