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Bacterial cellulose-graphene oxide composite membranes with enhanced fouling resistance for bio-effluents management 用于生物废水处理的抗污能力更强的细菌纤维素-氧化石墨烯复合膜
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-25 DOI: 10.1038/s41545-024-00403-9
Ishfaq Showket Mir, Ali Riaz, Julie Fréchette, Joy Sankar Roy, James Mcelhinney, Sisi Pu, Hari Kalathil Balakrishnan, Jesse Greener, Ludovic F. Dumée, Younès Messaddeq
{"title":"Bacterial cellulose-graphene oxide composite membranes with enhanced fouling resistance for bio-effluents management","authors":"Ishfaq Showket Mir, Ali Riaz, Julie Fréchette, Joy Sankar Roy, James Mcelhinney, Sisi Pu, Hari Kalathil Balakrishnan, Jesse Greener, Ludovic F. Dumée, Younès Messaddeq","doi":"10.1038/s41545-024-00403-9","DOIUrl":"10.1038/s41545-024-00403-9","url":null,"abstract":"Bacterial cellulose composites hold promise as renewable bioinspired materials for industrial and environmental applications. However, their use as free-standing water filtration membranes is hindered by low compressive strength, fouling, and poor contaminant selectivity. This study investigates the potential of bacterial cellulose-graphene oxide composites membranes for fouling resistance in pressure-driven filtration. Graphene oxide dispersed in poly(ethylene glycol) (PEG-400) is incorporated as a reinforcing filler into 3D network of bacterial cellulose using an in-situ synthesis method. The effect of graphene oxide on in situ fermentation yield and the formation of percolated-network in the composites shows that the optimal membrane properties are reached at a graphene oxide loading of 2 mg/mL. The two-dimensional graphene oxide nanosheets uniformly dispersed into the matrix of bacterial cellulose nanofibers via hydrogen-bonded interactions demonstrated nearly twofold higher water flux (380 L m−2 h−1) with a molecular weight cut-off ranging between 100–200 KDa and a sixfold increase in wet compression strength than pristine BC. When exposed to synthetic organic foulants and bacterial rich feed solutions, the composite membranes showed more than 95% flux recovery. Additionally, the membranes achieved over 95% rejection of synthetic natural organic matter and bacterial rich solutions, showcasing their enhanced fouling resistance and selectivity.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-15"},"PeriodicalIF":10.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00403-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142490466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Training caretakers to clean community wells is a highly cost-effective way to reduce exposure to coliform bacteria 培训看护人清洁社区水井是减少大肠菌群暴露的一种极具成本效益的方法
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-23 DOI: 10.1038/s41545-024-00401-x
Md. Ahasan Habib, Serena Cocciolo, Md. Mir Abu Raihan, Prosun Bhattacharya, Anna Tompsett
{"title":"Training caretakers to clean community wells is a highly cost-effective way to reduce exposure to coliform bacteria","authors":"Md. Ahasan Habib, Serena Cocciolo, Md. Mir Abu Raihan, Prosun Bhattacharya, Anna Tompsett","doi":"10.1038/s41545-024-00401-x","DOIUrl":"10.1038/s41545-024-00401-x","url":null,"abstract":"Existing strategies for improving global access to safe drinking water have met only limited success. We consider an unglamorous and often neglected dimension of drinking water infrastructure provision: cleaning. We randomly assigned caretakers of community wells to participate in a training workshop about how to clean wells. Thirteen to seventeen months later, wells with caretakers assigned to receive training have negligible rates of contamination with Escherichia coli (13 months: 2%; 17 months: 4%), while control wells have substantial rates of E. coli contamination (13 months: 14%; 17 months: 19%). Rates of contamination with any coliform bacteria are almost halved (13 months: control 55%, treated 30%; 17 months: control 77%, treated 46%). We estimate the cost of preventing exposure to coliform bacteria in drinking water to be US$0.89 per person and that, if scaled up, each US$2376 spent on the intervention could avoid the death of a child.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-9"},"PeriodicalIF":10.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00401-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142488881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Uncovering pathway and mechanism of simultaneous thiocyanate detoxicity and nitrate removal through anammox and denitrification 通过anammox和反硝化作用揭示硫氰酸盐同时解毒和去除硝酸盐的途径和机制
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-22 DOI: 10.1038/s41545-024-00402-w
Xue Chen, Fuang Duan, Xi Yu, Yuyang Xie, Zhibin Wang, Shou-Qing Ni
{"title":"Uncovering pathway and mechanism of simultaneous thiocyanate detoxicity and nitrate removal through anammox and denitrification","authors":"Xue Chen, Fuang Duan, Xi Yu, Yuyang Xie, Zhibin Wang, Shou-Qing Ni","doi":"10.1038/s41545-024-00402-w","DOIUrl":"10.1038/s41545-024-00402-w","url":null,"abstract":"Thiocyanate (SCN−) exists in various industries and is detrimental to the ecosystem, necessitating cost-effective and environmentally benign treatment. In response to alleviate the bacterial toxicity of SCN−, this study developed a two-stage coupled system by tandem of anammox in reactor 1 (R1) and SCN−-driven autotrophic denitrification in reactor 2 (R2), achieving simultaneous removal of SCN− and nitrogen. The total nitrogen removal efficiency of the coupled system was 92.42 ± 1.98%, with nearly 100% of SCN− elimination. Thiobacillus was responsible for SCN− degradation. The deduced degradation pathway of SCN− was via the cyanate pathway before coupling, followed by the co-action of cyanate pathway and carbonyl sulfide pathway after coupling. Although scaling-up study is needed to validate its applicability in real-world applications, this study contributes to the advancement of sustainable and cost-effective wastewater treatment technologies, being an attractive path for low-carbon nitrogen removal and greenhouse gas emission-free technology.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-12"},"PeriodicalIF":10.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00402-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142486622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Author Correction: The enhancement of anammox by graphene-based and iron-based nanomaterials in performance and mechanisms 作者更正：石墨烯基和铁基纳米材料在性能和机理上对anammox的增强作用
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-21 DOI: 10.1038/s41545-024-00405-7
Shu Wang, Kaoming Zhang, Yu Miao, Zhu Wang
{"title":"Author Correction: The enhancement of anammox by graphene-based and iron-based nanomaterials in performance and mechanisms","authors":"Shu Wang, Kaoming Zhang, Yu Miao, Zhu Wang","doi":"10.1038/s41545-024-00405-7","DOIUrl":"10.1038/s41545-024-00405-7","url":null,"abstract":"","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-1"},"PeriodicalIF":10.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00405-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142488184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessing the influence of environmental variables on energy efficiency changes in the provision of drinking water services 评估环境变量对提供饮用水服务过程中能效变化的影响
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-10 DOI: 10.1038/s41545-024-00400-y
Ramon Sala-Garrido, Manuel Mocholi-Arce, Alexandros Maziotis, Maria Molinos-Senante
{"title":"Assessing the influence of environmental variables on energy efficiency changes in the provision of drinking water services","authors":"Ramon Sala-Garrido, Manuel Mocholi-Arce, Alexandros Maziotis, Maria Molinos-Senante","doi":"10.1038/s41545-024-00400-y","DOIUrl":"10.1038/s41545-024-00400-y","url":null,"abstract":"Within the context of the water-energy nexus in drinking water provision, it is crucial to evaluate temporal shifts in energy efficiency. Utilizing the Stochastic Nonparametric Envelopment of Data (StoNED) approach, this research estimates longitudinal variations in the energy efficiency of drinking water services integrating multiple environmental variables. The analysis, conducted in England and Wales from 2008 to 2020, indicates that the source and quality of raw water, as well as population density, influenced the energy performance of water utilities. Quantitative findings evidenced marked disparity in energy efficiency among different companies, with an average efficiency of 0.617 and a range from 0.437 to 0.944. The dynamic assessment indicates an average annual enhancement of 1.1% in the sector, predominantly propelled by technical advancements (0.9%) rather than by improvements in efficiency (0.2%). This study emphasizes the critical need for bespoke policies and incentives to boost energy efficiency and support sustainable urban water management.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-10"},"PeriodicalIF":10.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00400-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142397566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modelling scenarios for water supply and sanitation technologies in Jordan 约旦供水和卫生技术模拟方案
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-10 DOI: 10.1038/s41545-024-00398-3
Margarita Garfias Royo, Himanshu Parikh, Luiza Campos, Samer Talozi, Priti Parikh
{"title":"Modelling scenarios for water supply and sanitation technologies in Jordan","authors":"Margarita Garfias Royo, Himanshu Parikh, Luiza Campos, Samer Talozi, Priti Parikh","doi":"10.1038/s41545-024-00398-3","DOIUrl":"10.1038/s41545-024-00398-3","url":null,"abstract":"The influx of refugees, population growth and current agricultural practices have led to an increase in water demand in Jordan, placing pressure on existing water provision. Climate change further exacerbates declining water availability. Against this backdrop, the techno-economic feasibility of four water supply and sanitation alternatives for small and medium scale cities in Jordan were explored, using local unit costs and Al-Mafraq as a case study. City level piped network combined with household rooftop rainwater harvesting and surface runoff collection into local ponds and piped networks with treatment using the nature-based solution of root-zone for sanitation were demonstrated to provide the highest benefits in terms of cost, convenience and water conservation. Our work highlights the need to invest in long-term urban infrastructure networks to promote sustainable future growth of cities. This is vital to address severe water scarcity challenges that ultimately impact those at the urban fringes most.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-10"},"PeriodicalIF":10.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00398-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142405234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sustainable cost recovery principles can drive equitable, ongoing funding of critical urban sanitation services 可持续成本回收原则可推动公平、持续地为重要的城市环卫服务供资
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-10 DOI: 10.1038/s41545-024-00399-2
Naomi Carrard, Juliet Willetts, Antoinette Kome, Rajeev Munankami
{"title":"Sustainable cost recovery principles can drive equitable, ongoing funding of critical urban sanitation services","authors":"Naomi Carrard, Juliet Willetts, Antoinette Kome, Rajeev Munankami","doi":"10.1038/s41545-024-00399-2","DOIUrl":"10.1038/s41545-024-00399-2","url":null,"abstract":"This Comment critiques current urban sanitation financing discourse and proposes sustainable cost recovery principles as a framework for more constructive conversations. The way we talk about financing matters, and a better conversation can lead to better outcomes. We contend that framing discussions around sustainable cost recovery principles can foster fairer, more sustainable financing arrangements that acknowledge sanitation as a critical public good while ensuring service provider viability and user affordability.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-4"},"PeriodicalIF":10.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00399-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142397605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantitative Raman analysis of microplastics in water using peak area ratios for concentration determination 利用峰面积比确定水中微塑料的浓度，对其进行定量拉曼分析
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-09 DOI: 10.1038/s41545-024-00397-4
Eun Su Jung, Jin Hyun Choe, Jin Seok Kim, Da Won Ahn, JinUk Yoo, Tae Min Choi, Sung Gyu Pyo
{"title":"Quantitative Raman analysis of microplastics in water using peak area ratios for concentration determination","authors":"Eun Su Jung, Jin Hyun Choe, Jin Seok Kim, Da Won Ahn, JinUk Yoo, Tae Min Choi, Sung Gyu Pyo","doi":"10.1038/s41545-024-00397-4","DOIUrl":"10.1038/s41545-024-00397-4","url":null,"abstract":"This study presents a novel analytical method for the quantitative and qualitative analysis of microplastics (MPs) in deionized (DI) water using Raman spectroscopy. Raman peak area ratios of 1295 cm−1 for polyethylene (PE) and 637 cm−1 for polyvinylchloride (PVC) to the broad H2O peak were utilized to establish a calibration model for the concentration of MPs dispersed in DI water at 0.1 wt% to 1.0 wt%. The calibration model demonstrated R2 values of 0.98537 for PE and 0.99511 for PVC, indicating high linearity between the peak area ratio and concentration. The calibration model was validated using mixed PE and PVC samples to confirm its applicability to real-world water bodies, where multiple types of MPs are present. The calculated standard error of calibration (SEC) and relative standard error of calibration (%RSEC) values further confirmed the accuracy of the predictions, providing a robust approach for detecting and quantifying MPs in aquatic environments.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-6"},"PeriodicalIF":10.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00397-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142397596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chemical, ecotoxicological characteristics, environmental fate, and treatment methods applied to cyanide-containing wastewater 含氰废水的化学、生态毒理学特征、环境归宿和处理方法
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-05 DOI: 10.1038/s41545-024-00392-9
Katherine Vaca-Escobar, David Arregui-Almeida, Patricio Espinoza-Montero
{"title":"Chemical, ecotoxicological characteristics, environmental fate, and treatment methods applied to cyanide-containing wastewater","authors":"Katherine Vaca-Escobar, David Arregui-Almeida, Patricio Espinoza-Montero","doi":"10.1038/s41545-024-00392-9","DOIUrl":"10.1038/s41545-024-00392-9","url":null,"abstract":"The main chemical, ecotoxicological, and environmental fate characteristics of cyanide, along with its treatment methods for cyanide-contaminated wastewater, were thoroughly examined. A global biogeochemical cycle of cyanide is proposed, covering the key physicochemical processes occurring in aqueous, soil, and atmospheric environments. The principles, advantages, and disadvantages of various treatment methods—including chemical, physicochemical, electrochemical, photochemical, and biological approaches—are evaluated. Finally, the feasibility of reusing cyanide waste is explored.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-16"},"PeriodicalIF":10.4,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00392-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142377335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Indicators for evaluating shared sanitation quality: a systematic review and recommendations for sanitation monitoring 评价共享环境卫生质量的指标：系统审查和环境卫生监测建议
IF 10.4 1区 工程技术
npj Clean Water Pub Date : 2024-10-04 DOI: 10.1038/s41545-024-00386-7
Sarah Lebu, Lauren Sprouse, John Apambilla Akudago, Carrie Baldwin-SoRelle, Chimdi C. Muoghalu, Carmen Anthonj, Barbara Evans, Joe Brown, Jamie Bartram, Musa Manga
{"title":"Indicators for evaluating shared sanitation quality: a systematic review and recommendations for sanitation monitoring","authors":"Sarah Lebu, Lauren Sprouse, John Apambilla Akudago, Carrie Baldwin-SoRelle, Chimdi C. Muoghalu, Carmen Anthonj, Barbara Evans, Joe Brown, Jamie Bartram, Musa Manga","doi":"10.1038/s41545-024-00386-7","DOIUrl":"10.1038/s41545-024-00386-7","url":null,"abstract":"Shared sanitation facilities have replaced open defecation in many areas, improving sanitation access. Although a broad body of literature has been published regarding the importance of shared sanitation services, it is still unclear how to assess their quality. The objective of this review was to synthesize evidence on the use of shared sanitation facilities in informal settlements and identify indicators for assessing their quality. We conducted a systematic review of relevant studies and a total of 248 studies were included in the final analysis. Findings include a proposed list of indicators for evaluating the quality of shared sanitation such as the number of people sharing facilities, cleanliness, privacy, facility location, accessibility, and safety, and a tool for distinguishing between sanitation facilities that are improved shared, basic shared and unimproved shared. We recommend incorporating the proposed indicators in primary data collection, and routine national and global sanitation monitoring.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-15"},"PeriodicalIF":10.4,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00386-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142374207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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