首页 > 最新文献

Cleaner Water最新文献

英文 中文
Disclosing water security by water utilities 水务公司披露水安全情况
Pub Date : 2024-09-05 DOI: 10.1016/j.clwat.2024.100037
Cláudia O.M. Sousa, Nuno M.M.D. Fouto

Using a scoring technique, we have developed a Water Security Reporting Index (WSRI) to assess the disclosed information pertaining to the preparedness for extreme water events among 15 Brazilian water utilities. This evaluation is based on the analysis of annual reports from water and sanitation companies. The WSRI incorporates seven dimensions: (i) Climate changes and their impacts on water availability; (ii) Water availability evaluation and measurement; (iii) Improvements in supply infrastructure systems; (iv) Demand-side infrastructure improvements; (v) User awareness creation; (vi) Water availability prediction; and (vii) Actions to prevent water availability issues. The findings reveal a paradoxical scenario where the WSRI falls significantly below the maximum score. Simultaneously, the growing concerns about the impacts of global change, leading to an increase in the frequency and magnitude of extreme weather events, highlight a pressing issue in Brazil. Neglecting this concern implies disregarding the impending scarcity of water, the primary focus of water utilities. User awareness creation emerges as the dimension with the highest score. Conversely, water availability evaluation and prediction, along with demand-side infrastructure improvements, receive the least attention from water utility managers in terms of water security. This study underscores the disparity between the clear understanding that water supply companies possess regarding the impacts of climate change on the water industry and their failure to effectively communicate the actions they have adopted and planned.

通过评分技术,我们制定了水安全报告指数 (WSRI),以评估巴西 15 家水务公司披露的有关极端水事件准备情况的信息。该评估基于对供水和卫生公司年度报告的分析。WSRI 包括七个方面:(i) 气候变化及其对供水的影响;(ii) 供水评估和测量;(iii) 供水基础设施系统的改进;(iv) 需求方基础设施的改进;(v) 用户意识的培养;(vi) 供水预测;以及 (vii) 预防供水问题的行动。调查结果揭示了一种矛盾的情况,即 WSRI 明显低于最高分。与此同时,人们对全球变化的影响日益关注,导致极端天气事件的频率和规模增加,突出了巴西的一个紧迫问题。忽视这一问题就意味着忽视了即将到来的水资源短缺问题,而这正是水务公司的首要关注点。用户意识的培养是得分最高的维度。相反,在水安全方面,供水量评估和预测以及需求方基础设施的改善受到水务管理人员的关注最少。这项研究强调了供水公司对气候变化对水务行业影响的清晰认识与他们未能有效宣传所采取和计划采取的行动之间的差距。
{"title":"Disclosing water security by water utilities","authors":"Cláudia O.M. Sousa,&nbsp;Nuno M.M.D. Fouto","doi":"10.1016/j.clwat.2024.100037","DOIUrl":"10.1016/j.clwat.2024.100037","url":null,"abstract":"<div><p>Using a scoring technique, we have developed a Water Security Reporting Index (WSRI) to assess the disclosed information pertaining to the preparedness for extreme water events among 15 Brazilian water utilities. This evaluation is based on the analysis of annual reports from water and sanitation companies. The WSRI incorporates seven dimensions: (i) Climate changes and their impacts on water availability; (ii) Water availability evaluation and measurement; (iii) Improvements in supply infrastructure systems; (iv) Demand-side infrastructure improvements; (v) User awareness creation; (vi) Water availability prediction; and (vii) Actions to prevent water availability issues. The findings reveal a paradoxical scenario where the WSRI falls significantly below the maximum score. Simultaneously, the growing concerns about the impacts of global change, leading to an increase in the frequency and magnitude of extreme weather events, highlight a pressing issue in Brazil. Neglecting this concern implies disregarding the impending scarcity of water, the primary focus of water utilities. User awareness creation emerges as the dimension with the highest score. Conversely, water availability evaluation and prediction, along with demand-side infrastructure improvements, receive the least attention from water utility managers in terms of water security. This study underscores the disparity between the clear understanding that water supply companies possess regarding the impacts of climate change on the water industry and their failure to effectively communicate the actions they have adopted and planned.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100037"},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000358/pdfft?md5=388c11ae56830b6dd19ce10e05751d17&pid=1-s2.0-S2950263224000358-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Environmental justice indicators: Evaluating their effectiveness in identifying at-risk communities for drinking water violations 环境正义指标:评估其在确定饮用水违规风险社区方面的有效性
Pub Date : 2024-08-24 DOI: 10.1016/j.clwat.2024.100035
Rae Cade , Danlin Yu , Kyle Whyte , Pankaj Lal , Cortni Borgerson

Despite improvements to environmental protection initiatives, millions of Black, Indigenous, and other people of color (BIPOC) continue to live in communities that are disproportionately affected by environmental contamination. Environmental Justice (EJ) screening tools, such as CalEnviroScreen, EJ Map, and PennEnviroScreen, have been developed to help state and federal governments gauge the extent of EJ in their jurisdictions. These screening tools have propelled the EJ advocacy initiative, illustrating the historic and ongoing disproportionate effects of contamination in many BIPOC communities. Yet, screening tools and their indicators vary, and we must understand how these tools and indicator choices differently identify at-risk communities, including those facing drinking water violations. We investigate how indicator choices differently identify and affect communities facing such violations. Specifically, we examine how EJ screening tools differently identify at-risk communities experiencing drinking water violations, which indicators drive these differences, and how indicator choice affects community identification. Our analysis reveals that EJ screen indicators preferentially identify at-risk, low-income, unemployed, BIPOC renters. However, additional indicators such as middle-income and food insecurity/SNAP can expand identification to ensure actions reach neglected communities. By developing and enhancing EJ screening tools, we can better determine which drinking water violations are present, identify who is being affected by them, and better direct our mitigation efforts to communities in need of assistance.

尽管环境保护措施有所改善,但仍有数百万黑人、土著人和其他有色人种 (BIPOC) 生活在受环境污染影响尤为严重的社区。环境正义(EJ)筛查工具,如 CalEnviroScreen、EJ Map 和 PennEnviroScreen,已被开发出来,以帮助州政府和联邦政府衡量其管辖范围内的环境正义程度。这些筛查工具推动了环境正义宣传倡议,说明了污染在许多黑人、印地安人和阿什卡利人社区的历史性和持续性过度影响。然而,筛查工具及其指标各不相同,我们必须了解这些工具和指标选择如何以不同方式识别高风险社区,包括面临饮用水违规问题的社区。我们研究了指标选择如何以不同方式识别并影响面临此类违规行为的社区。具体来说,我们研究了 EJ 筛选工具如何以不同方式识别面临饮用水违规问题的高危社区,哪些指标会导致这些差异,以及指标选择如何影响社区识别。我们的分析表明,EJ 筛选指标优先识别高风险、低收入、失业、BIPOC 租房者。然而,中等收入和食品不安全/SNAP 等附加指标可以扩大识别范围,确保行动惠及被忽视的社区。通过开发和增强 EJ 筛选工具,我们可以更好地确定哪些饮用水违规现象存在,识别受其影响的人群,并更好地将我们的缓解工作引向需要帮助的社区。
{"title":"Environmental justice indicators: Evaluating their effectiveness in identifying at-risk communities for drinking water violations","authors":"Rae Cade ,&nbsp;Danlin Yu ,&nbsp;Kyle Whyte ,&nbsp;Pankaj Lal ,&nbsp;Cortni Borgerson","doi":"10.1016/j.clwat.2024.100035","DOIUrl":"10.1016/j.clwat.2024.100035","url":null,"abstract":"<div><p>Despite improvements to environmental protection initiatives, millions of Black, Indigenous, and other people of color (BIPOC) continue to live in communities that are disproportionately affected by environmental contamination. Environmental Justice (EJ) screening tools, such as CalEnviroScreen, EJ Map, and PennEnviroScreen, have been developed to help state and federal governments gauge the extent of EJ in their jurisdictions. These screening tools have propelled the EJ advocacy initiative, illustrating the historic and ongoing disproportionate effects of contamination in many BIPOC communities. Yet, screening tools and their indicators vary, and we must understand how these tools and indicator choices differently identify at-risk communities, including those facing drinking water violations. We investigate how indicator choices differently identify and affect communities facing such violations. Specifically, we examine how EJ screening tools differently identify at-risk communities experiencing drinking water violations, which indicators drive these differences, and how indicator choice affects community identification. Our analysis reveals that EJ screen indicators preferentially identify at-risk, low-income, unemployed, BIPOC renters. However, additional indicators such as middle-income and food insecurity/SNAP can expand identification to ensure actions reach neglected communities. By developing and enhancing EJ screening tools, we can better determine which drinking water violations are present, identify who is being affected by them, and better direct our mitigation efforts to communities in need of assistance.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100035"},"PeriodicalIF":0.0,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000334/pdfft?md5=1ec5325356495fb91a10369348a62c1b&pid=1-s2.0-S2950263224000334-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microbial cell factories in the degradation of azo-dye and their limiting factors: An insight 降解偶氮染料的微生物细胞工厂及其限制因素:洞察
Pub Date : 2024-08-24 DOI: 10.1016/j.clwat.2024.100034
Sahiba Khan, Debajit Borah

Azo dyes are the most commonly produced dyes worldwide, characterized by their distinct azo groups (-NN-) in their chemical structure. These dyes are xenobiotic and notably resistant to degradation. Approximately 20 % of all water body contamination is caused exclusively by textile effluents, which are released into the environment either deliberately or accidentally, leading to significant environmental toxicity. While numerous physical and chemical treatment methods are available, they each have their own drawbacks. Therefore, this comprehensive review explores the role of various microbes, including bacteria, bacterial consortia, fungi, algae, and lichens, along with their limiting factors. The review also delves into the role of various microbial enzymes and their encoding genes, as well as the molecular mechanisms involved. This study emphasizes the potential of microbial bioremediation as a cost-effective and eco-friendly tool for treating azo dye-contaminated water, in comparison to other techniques.

偶氮染料是世界上最常见的染料,其化学结构中含有明显的偶氮基团(-NN-)。这些染料具有异生物性,特别耐降解。大约 20% 的水体污染完全是由纺织污水造成的,这些污水被有意或无意地排放到环境中,导致严重的环境毒性。虽然有许多物理和化学处理方法,但它们都有各自的缺点。因此,本综述探讨了各种微生物(包括细菌、细菌联合体、真菌、藻类和地衣)的作用及其限制因素。综述还深入探讨了各种微生物酶及其编码基因的作用,以及相关的分子机制。与其他技术相比,本研究强调了微生物生物修复作为一种处理偶氮染料污染水的具有成本效益和生态友好型工具的潜力。
{"title":"Microbial cell factories in the degradation of azo-dye and their limiting factors: An insight","authors":"Sahiba Khan,&nbsp;Debajit Borah","doi":"10.1016/j.clwat.2024.100034","DOIUrl":"10.1016/j.clwat.2024.100034","url":null,"abstract":"<div><p>Azo dyes are the most commonly produced dyes worldwide, characterized by their distinct azo groups (-N<img>N-) in their chemical structure. These dyes are xenobiotic and notably resistant to degradation. Approximately 20 % of all water body contamination is caused exclusively by textile effluents, which are released into the environment either deliberately or accidentally, leading to significant environmental toxicity. While numerous physical and chemical treatment methods are available, they each have their own drawbacks. Therefore, this comprehensive review explores the role of various microbes, including bacteria, bacterial consortia, fungi, algae, and lichens, along with their limiting factors. The review also delves into the role of various microbial enzymes and their encoding genes, as well as the molecular mechanisms involved. This study emphasizes the potential of microbial bioremediation as a cost-effective and eco-friendly tool for treating azo dye-contaminated water, in comparison to other techniques.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100034"},"PeriodicalIF":0.0,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000322/pdfft?md5=0bf1f28e2de5a0e5fc503ecb1a64dbd6&pid=1-s2.0-S2950263224000322-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142087184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The influence of cathodic materials and optimization of the removal of the chromium (VI) from tannery wastewater by electrocoagulation 阴极材料的影响及电凝法去除制革废水中铬(VI)的优化方案
Pub Date : 2024-08-17 DOI: 10.1016/j.clwat.2024.100032
Romuald Teguia Doumbi , Jean Olivier Kowe , Domga , Djonga weldi Gnowe , Guy Bertrand Noumi

The present work focuses on the optimization of the removal percentage of Chromium (VI) from a real tannery effluent by electrocoagulation process (EC). The influence of high efficiency cathodic materials (titanium and nickel) was also investigated in this work. The tannery effluent is from the town of Maroua in the Far North Region in Cameroon. The effectiveness of the main operational parameters such as current intensity, initial Cr (VI) concentration, initial pH as well as solution conductivity was examined. All experiments were carried out in an electrocoagulation cell with an effective volume of 400 mL using two electrode combinations as anode/cathode (Al/Ti and Al/Ni). It was found that the Al/Ti combination exhibits higher removal efficiency than Al/Ni under the same operational conditions. Cr (VI) removal efficiencies of 90.93 % and 84.30 % were respectively observed for the Al/Ti and Al/Ni electrodes with an optimal initial pH (pH=6). The maximum current intensity, the maximum initial Cr (VI) concentration as well as the NaCl concentration were 0.4 A, 10 mg/L Cr(VI) and 1.5 g/L respectively. Response surface methodology by the mean of central composite design was performed. The influence of current intensity (100–300 mA), electrolysis time (10–30 min) and interelectrode spacing (1–3 cm), the probability and the mathematical model were highly discussed. According to the experimental design results, the removal of Cr (VI) in the real tannery effluent was up to 99.58 %. For the aforementioned efficiency it requires the optimum values of 211.891 mA, 36.8179 min and 1.609 cm for current intensity, time and the interelectrode spacing, respectively. EC has shown to be easy to operate, to be economic by using cheaper electrodes and efficient for the treatment of real tannery effluent.

本研究的重点是通过电凝工艺(EC)优化实际制革厂废水中铬(VI)的去除率。这项工作还研究了高效阴极材料(钛和镍)的影响。制革废水来自喀麦隆远北地区的马鲁阿镇。研究了电流强度、初始 Cr (VI) 浓度、初始 pH 值以及溶液电导率等主要操作参数的有效性。所有实验均在一个有效容积为 400 毫升的电凝池中进行,使用两种电极组合作为阳极/阴极(Al/Ti 和 Al/Ni)。实验发现,在相同的操作条件下,Al/Ti 组合的去除效率高于 Al/Ni。在最佳初始 pH 值(pH=6)条件下,Al/Ti 和 Al/Ni 电极对六价铬的去除率分别为 90.93% 和 84.30%。最大电流强度、最大初始六价铬浓度和 NaCl 浓度分别为 0.4 A、10 mg/L 六价铬和 1.5 g/L。采用中心复合设计的响应面方法进行了研究。对电流强度(100-300 mA)、电解时间(10-30 min)和电极间距(1-3 cm)、概率和数学模型的影响进行了高度讨论。根据实验设计结果,实际制革废水中六价铬的去除率高达 99.58%。要达到上述效率,电流强度、时间和电极间距的最佳值分别为 211.891 mA、36.8179 min 和 1.609 cm。事实证明,电解槽操作简便,使用较便宜的电极,经济实惠,而且在处理实际制革废水时效率很高。
{"title":"The influence of cathodic materials and optimization of the removal of the chromium (VI) from tannery wastewater by electrocoagulation","authors":"Romuald Teguia Doumbi ,&nbsp;Jean Olivier Kowe ,&nbsp;Domga ,&nbsp;Djonga weldi Gnowe ,&nbsp;Guy Bertrand Noumi","doi":"10.1016/j.clwat.2024.100032","DOIUrl":"10.1016/j.clwat.2024.100032","url":null,"abstract":"<div><p>The present work focuses on the optimization of the removal percentage of Chromium (VI) from a real tannery effluent by electrocoagulation process (EC). The influence of high efficiency cathodic materials (titanium and nickel) was also investigated in this work. The tannery effluent is from the town of Maroua in the Far North Region in Cameroon. The effectiveness of the main operational parameters such as current intensity, initial Cr (VI) concentration, initial pH as well as solution conductivity was examined. All experiments were carried out in an electrocoagulation cell with an effective volume of 400 mL using two electrode combinations as anode/cathode (Al/Ti and Al/Ni). It was found that the Al/Ti combination exhibits higher removal efficiency than Al/Ni under the same operational conditions. Cr (VI) removal efficiencies of 90.93 % and 84.30 % were respectively observed for the Al/Ti and Al/Ni electrodes with an optimal initial pH (pH=6). The maximum current intensity, the maximum initial Cr (VI) concentration as well as the NaCl concentration were 0.4 A, 10 mg/L Cr(VI) and 1.5 g/L respectively. Response surface methodology by the mean of central composite design was performed. The influence of current intensity (100–300 mA), electrolysis time (10–30 min) and interelectrode spacing (1–3 cm), the probability and the mathematical model were highly discussed. According to the experimental design results, the removal of Cr (VI) in the real tannery effluent was up to 99.58 %. For the aforementioned efficiency it requires the optimum values of 211.891 mA, 36.8179 min and 1.609 cm for current intensity, time and the interelectrode spacing, respectively. EC has shown to be easy to operate, to be economic by using cheaper electrodes and efficient for the treatment of real tannery effluent.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100032"},"PeriodicalIF":0.0,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000309/pdfft?md5=5c4e074ba3ee71a2cb02dab3160f6f11&pid=1-s2.0-S2950263224000309-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141998618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rankala Lake quarry water purification via a dual strategy involving hydrodynamic cavitation and ozonation 通过水动力空化和臭氧处理双重策略净化兰卡拉湖采石场水质
Pub Date : 2024-08-14 DOI: 10.1016/j.clwat.2024.100033
Amarsinh L. Jadhav , Parvez A. Gardi , Amruta A. Bhosale , Prajeet A. Kadam , Dhairyasheel P. Ghorpade

This research presents a ground-breaking approach to wastewater treatment that leverages hydrodynamic cavitation and ozonation with unprecedented efficiency and environmental benefits by resolving the concern of the ever-present paradox of water scarcity and persistent pollutants in wastewater, and it compels scientists to relentlessly pursue innovative and eco-friendly treatment solutions. This study introduces a pioneering method for treating wastewater employing a sequential approach of hydrodynamic cavitation (HC) coupled with subsequent ozonation (O3). This research examined the process of purifying rainwater collected from the Rankala Lake quarry in Kolhapur, India. The treatment, which lasted for approximately 7 hours each day over a span of three weeks, resulted in notable enhancements in water quality. The initial greenish discoloration and bad odor were notably eradicated within a week, without any chemical additives. The microbial burden decreased significantly from 105 CFU/mL to 102 CFU/mL, indicating a strong level of disinfection. The COD decreased significantly from 110 ppm to less than 10 ppm, while the BOD decreased dramatically to undetectable levels (0 ppm) from 55 ppm. In addition, there was a slight change in the concentration of chloride, water hardness, clarity, and total dissolved solids (TDS). This exemplifies the efficacy of the cavitation process coupled with ozonation for converting polluted, discolored, and malodorous water into purified water appropriate for diverse uses.

这项研究提出了一种开创性的废水处理方法,即利用流体动力空化和臭氧处理废水,以前所未有的效率和环境效益解决水资源短缺和废水中持久性污染物这一长期存在的悖论。本研究介绍了一种开创性的废水处理方法,该方法采用水动力空化(HC)与随后的臭氧处理(O3)相结合的顺序方法。这项研究考察了从印度科尔哈布尔兰卡拉湖采石场收集的雨水的净化过程。在为期三周的时间里,每天处理约 7 个小时,水质明显改善。在不使用任何化学添加剂的情况下,最初的绿色变色和异味在一周内明显消除。微生物负荷从 105 CFU/mL 显著下降到 102 CFU/mL,表明消毒效果很好。化学需氧量从百万分之 110 显著下降到百万分之 10 以下,而生化需氧量从百万分之 55 显著下降到检测不到的水平(百万分之 0)。此外,氯化物浓度、水硬度、透明度和溶解性总固体 (TDS) 也略有变化。这充分体现了空化工艺和臭氧处理在将污染、变色和恶臭的水转化为适合各种用途的纯净水方面的功效。
{"title":"Rankala Lake quarry water purification via a dual strategy involving hydrodynamic cavitation and ozonation","authors":"Amarsinh L. Jadhav ,&nbsp;Parvez A. Gardi ,&nbsp;Amruta A. Bhosale ,&nbsp;Prajeet A. Kadam ,&nbsp;Dhairyasheel P. Ghorpade","doi":"10.1016/j.clwat.2024.100033","DOIUrl":"10.1016/j.clwat.2024.100033","url":null,"abstract":"<div><p>This research presents a ground-breaking approach to wastewater treatment that leverages hydrodynamic cavitation and ozonation with unprecedented efficiency and environmental benefits by resolving the concern of the ever-present paradox of water scarcity and persistent pollutants in wastewater, and it compels scientists to relentlessly pursue innovative and eco-friendly treatment solutions. This study introduces a pioneering method for treating wastewater employing a sequential approach of hydrodynamic cavitation (HC) coupled with subsequent ozonation (O3). This research examined the process of purifying rainwater collected from the Rankala Lake quarry in Kolhapur, India. The treatment, which lasted for approximately 7 hours each day over a span of three weeks, resulted in notable enhancements in water quality. The initial greenish discoloration and bad odor were notably eradicated within a week, without any chemical additives. The microbial burden decreased significantly from 10<sup>5</sup> CFU/mL to 10<sup>2</sup> CFU/mL, indicating a strong level of disinfection. The COD decreased significantly from 110 ppm to less than 10 ppm, while the BOD decreased dramatically to undetectable levels (0 ppm) from 55 ppm. In addition, there was a slight change in the concentration of chloride, water hardness, clarity, and total dissolved solids (TDS). This exemplifies the efficacy of the cavitation process coupled with ozonation for converting polluted, discolored, and malodorous water into purified water appropriate for diverse uses.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100033"},"PeriodicalIF":0.0,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000310/pdfft?md5=f07263d82a84c1caffe71aea79a0fb9d&pid=1-s2.0-S2950263224000310-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142011878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Removal of ammoniacal nitrogen from Malaysian palm oil mill effluent (POME) using optimized operating parameters of peat soil as natural adsorbent 利用泥炭土作为天然吸附剂的优化操作参数去除马来西亚棕榈油厂污水(POME)中的氨氮
Pub Date : 2024-08-12 DOI: 10.1016/j.clwat.2024.100031
Md. Arif Hossen , Nurashikin Yaacof , Fariha Najwa Azahar , Noraziah Ahmad , Azrina Abd Aziz

Nowadays, the use of natural absorbents to remove pollutants from POME has gained remarkable attention. The main objective of this study is to investigate the suitability and performance of modified peat soil as an adsorbent for the removal of NH3-N from POME. The chemical activation method was performed using readily available NaOH for the first time to improve the adsorption performance of naturally available low-cost peat soil. The physical properties of raw and modified peat soil were determined using water-holding capacity, moisture content, bulk density, porosity, and BET surface area. The adsorbents were also characterized by SEM and FTIR to investigate surface morphology and chemical composition. To optimize the experimental parameters namely adsorbent dosage, agitation rate, and contact time for removal of NH3-N from POME, response surface methodology (RSM) was employed in this study with two different activation ratios. Substantial improvement of physical properties was attained after the modification of raw peat soil. The SEM images of modified peat soil showed a more porous space structure with larger voids while the FT-IR demonstrated the distinctive functional groups in the raw and modified peat soil. At optimized conditions of 5.71 g/L adsorbent dosage, 50 rpm agitation rate, and 38.96 min contact time predicted removal efficiency of NH3-N has been revealed 64.06 and 58.74 % at 1:20 and 1:30 activation ratios, respectively. The experimental investigation using optimized parameters showed 69.12 ± 2.5 and 61.57 ± 4.3 % removal of NH3-N. The experimental and predicted results showed good agreement. The rapid removal of NH3-N (69.1 % within 39 min) was achieved by chemically modified peat soil in this study compared to previously reported studies. Nevertheless, the raw and modified peat soil showed good stability up to three cycles of reusability.

如今,利用天然吸附剂去除 POME 中的污染物已受到广泛关注。本研究的主要目的是研究改良泥炭土作为吸附剂去除 POME 中 NH3-N 的适用性和性能。本研究首次采用了化学活化法,使用现成的 NaOH 来改善天然低成本泥炭土的吸附性能。利用持水量、含水量、容重、孔隙度和 BET 表面积测定了原泥炭土和改良泥炭土的物理性质。此外,还利用扫描电镜和傅立叶变换红外光谱对吸附剂进行了表征,以研究其表面形态和化学成分。为了优化实验参数,即吸附剂用量、搅拌速率和接触时间,以去除 POME 中的 NH3-N,本研究采用了响应面方法(RSM),并使用了两种不同的活化比。对原始泥炭土进行改良后,其物理性质得到了显著改善。改性泥炭土的扫描电子显微镜图像显示其空间结构更加多孔,空隙更大,而傅立叶变换红外光谱则显示了原泥炭土和改性泥炭土中不同的官能团。在吸附剂用量为 5.71 g/L、搅拌速率为 50 rpm、接触时间为 38.96 min 的优化条件下,当活化比为 1:20 和 1:30 时,NH3-N 的预测去除率分别为 64.06% 和 58.74%。使用优化参数进行的实验研究表明,NH3-N 的去除率分别为 69.12 ± 2.5 % 和 61.57 ± 4.3 %。实验结果和预测结果显示出良好的一致性。与之前的研究相比,本研究中化学改性泥炭土实现了快速去除 NH3-N(39 分钟内去除 69.1%)。尽管如此,原始泥炭土和改良泥炭土在三个重复使用周期内都表现出良好的稳定性。
{"title":"Removal of ammoniacal nitrogen from Malaysian palm oil mill effluent (POME) using optimized operating parameters of peat soil as natural adsorbent","authors":"Md. Arif Hossen ,&nbsp;Nurashikin Yaacof ,&nbsp;Fariha Najwa Azahar ,&nbsp;Noraziah Ahmad ,&nbsp;Azrina Abd Aziz","doi":"10.1016/j.clwat.2024.100031","DOIUrl":"10.1016/j.clwat.2024.100031","url":null,"abstract":"<div><p>Nowadays, the use of natural absorbents to remove pollutants from POME has gained remarkable attention. The main objective of this study is to investigate the suitability and performance of modified peat soil as an adsorbent for the removal of NH<sub>3</sub>-N from POME. The chemical activation method was performed using readily available NaOH for the first time to improve the adsorption performance of naturally available low-cost peat soil. The physical properties of raw and modified peat soil were determined using water-holding capacity, moisture content, bulk density, porosity, and BET surface area. The adsorbents were also characterized by SEM and FTIR to investigate surface morphology and chemical composition. To optimize the experimental parameters namely adsorbent dosage, agitation rate, and contact time for removal of NH<sub>3</sub>-N from POME, response surface methodology (RSM) was employed in this study with two different activation ratios. Substantial improvement of physical properties was attained after the modification of raw peat soil. The SEM images of modified peat soil showed a more porous space structure with larger voids while the FT-IR demonstrated the distinctive functional groups in the raw and modified peat soil. At optimized conditions of 5.71 g/L adsorbent dosage, 50 rpm agitation rate, and 38.96 min contact time predicted removal efficiency of NH<sub>3</sub>-N has been revealed 64.06 and 58.74 % at 1:20 and 1:30 activation ratios, respectively. The experimental investigation using optimized parameters showed 69.12 ± 2.5 and 61.57 ± 4.3 % removal of NH<sub>3</sub>-N. The experimental and predicted results showed good agreement. The rapid removal of NH<sub>3</sub>-N (69.1 % within 39 min) was achieved by chemically modified peat soil in this study compared to previously reported studies. Nevertheless, the raw and modified peat soil showed good stability up to three cycles of reusability.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100031"},"PeriodicalIF":0.0,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000292/pdfft?md5=b1bf35d3dde811f6bad83e02a10feb48&pid=1-s2.0-S2950263224000292-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141990493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recent advancements in utilizing plant-based approaches for water and wastewater treatment technologies 以植物为基础的水和废水处理技术的最新进展
Pub Date : 2024-08-10 DOI: 10.1016/j.clwat.2024.100030
Jatin Kumar , Megha Choudhary , Pritam Kumar Dikshit , Sanjay Kumar

Overpopulation, expansion of agricultural practices, misuse of water resources, industrialization, and urbanization are among the major factors that have a big impact on the quantity and quality of water. It has been projected that around 4 billion humans would lack access to pure water by 2025. Thus, for a sustainable lifestyle, it is imperative to improve water quality. Conventional water and wastewater treatment technologies involve various chemical processes such as coagulation and disinfection and physical methods such as filtration and adsorption. For these processes, various chemicals are being used such as alum and lime in coagulation, chlorine and bromine in disinfection, and activated alumina, silica gel and zeolites in adsorption. However, such chemicals have high procurement cost and display negative impacts on environment and human health, due to which plant based coagulants, adsorbents, and disinfectants are now being majorly tested for water and wastewater treatment methods. The objective of this review article is to provide a recent update on plant derived coagulants, adsorbents, and disinfectants for the treatment of water and wastewater. This review article critically examines the various conventional plant based water cleaning methods and discusses their mechanisms. Prior to this study, plant-based coagulants, adsorbents, and disinfectants have been mainly separately reviewed, but a proper combined study is lacking. The present manuscript highlights the procedure of water and wastewater treatment plants first and then discusses all the three plant based water treatment methods sequentially. This study may be useful for the development of an efficient water and wastewater treatment method employing plant based coagulants, adsorbents, and disinfectants. The present study will also be beneficial for the researchers who are actively working on plant derived water cleaning methods.

人口过剩、农业生产方式的扩张、水资源的滥用、工业化和城市化是对水的数量和质量产生重大影响的主要因素。据预测,到 2025 年,将有约 40 亿人无法获得纯净水。因此,为了实现可持续的生活方式,改善水质势在必行。传统的水和废水处理技术涉及混凝和消毒等各种化学过程以及过滤和吸附等物理方法。在这些工艺中,使用了各种化学品,如混凝法中的明矾和石灰、消毒法中的氯和溴,以及吸附法中的活性氧化铝、硅胶和沸石。然而,这些化学品的采购成本很高,而且对环境和人类健康有负面影响,因此,目前主要在水和废水处理方法中测试植物性混凝剂、吸附剂和消毒剂。本综述文章的目的是介绍植物衍生混凝剂、吸附剂和消毒剂用于水和废水处理的最新进展。这篇综述文章批判性地研究了各种传统的植物水清洁方法,并讨论了它们的机理。在本研究之前,人们主要对植物性混凝剂、吸附剂和消毒剂分别进行了综述,但缺乏适当的综合研究。本手稿首先强调了水和废水处理厂的流程,然后依次讨论了所有三种基于植物的水处理方法。这项研究可能有助于开发一种采用植物混凝剂、吸附剂和消毒剂的高效水和废水处理方法。本研究还将有益于正在积极研究植物水清洁方法的研究人员。
{"title":"Recent advancements in utilizing plant-based approaches for water and wastewater treatment technologies","authors":"Jatin Kumar ,&nbsp;Megha Choudhary ,&nbsp;Pritam Kumar Dikshit ,&nbsp;Sanjay Kumar","doi":"10.1016/j.clwat.2024.100030","DOIUrl":"10.1016/j.clwat.2024.100030","url":null,"abstract":"<div><p>Overpopulation, expansion of agricultural practices, misuse of water resources, industrialization, and urbanization are among the major factors that have a big impact on the quantity and quality of water. It has been projected that around 4 billion humans would lack access to pure water by 2025. Thus, for a sustainable lifestyle, it is imperative to improve water quality. Conventional water and wastewater treatment technologies involve various chemical processes such as coagulation and disinfection and physical methods such as filtration and adsorption. For these processes, various chemicals are being used such as alum and lime in coagulation, chlorine and bromine in disinfection, and activated alumina, silica gel and zeolites in adsorption. However, such chemicals have high procurement cost and display negative impacts on environment and human health, due to which plant based coagulants, adsorbents, and disinfectants are now being majorly tested for water and wastewater treatment methods. The objective of this review article is to provide a recent update on plant derived coagulants, adsorbents, and disinfectants for the treatment of water and wastewater. This review article critically examines the various conventional plant based water cleaning methods and discusses their mechanisms. Prior to this study, plant-based coagulants, adsorbents, and disinfectants have been mainly separately reviewed, but a proper combined study is lacking. The present manuscript highlights the procedure of water and wastewater treatment plants first and then discusses all the three plant based water treatment methods sequentially. This study may be useful for the development of an efficient water and wastewater treatment method employing plant based coagulants, adsorbents, and disinfectants. The present study will also be beneficial for the researchers who are actively working on plant derived water cleaning methods.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100030"},"PeriodicalIF":0.0,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000280/pdfft?md5=c794d1d15b8a3a9941fced8424094e3b&pid=1-s2.0-S2950263224000280-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141993271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The application of transfer machine learning to predict and impute missing sulphate levels in different Acid Mine Drainage treatment plants 应用迁移机器学习来预测和估算不同酸性矿井排水处理厂中缺失的硫酸盐含量
Pub Date : 2024-08-08 DOI: 10.1016/j.clwat.2024.100029
Taskeen Hasrod , Yannick B. Nuapia , Hlanganani Tutu

An accurately pre-trained stacking ensemble machine learning regressor was used to predict sulphate levels in two other Acid Mine Drainage (AMD) treatment plants using Transfer Learning (TL). The model was trained on the large Central Rand (CR) water quality dataset and was used to predict and impute the sulphate levels in the scanty East Rand (ER) and West Rand (WR) datasets which would not have been sufficient to train ML models from scratch. TL was successfully used to overcome this barrier and rapidly predicted sulphate levels in the East Rand and West Rand plants using the pre-trained model and achieved a high level of accuracy (Mean Squared Error:0.00124, Mean Absolute Error:0.0290 and R2:0.963) for the East Rand plant when comparing the predicted and true sulphate values. No true sulphate values existed for the West Rand plant; however, TL was successful in imputing these missing values and rapidly completed the West Rand dataset by providing the historic sulphate levels. This was possible due to the high degree of similarity between all domains (treatment plants) since they had similar geographic locations, the same treatment process, possessed the same important features and had the same relationships between variables. TL was successful in providing three accurate datasets for AMD sulphate levels, an important accomplishment towards having reliable data for use in design of experiments aimed at recovering valuable resources such as elemental sulphur, gypsum and important metals from AMD.

利用迁移学习(TL)技术,将预先训练好的堆叠集合机器学习回归器用于预测另外两家酸性矿井排水(AMD)处理厂的硫酸盐含量。该模型在大型中央兰德(CR)水质数据集上进行了训练,并用于预测和估算稀少的东兰德(ER)和西兰德(WR)数据集中的硫酸盐含量。TL 成功克服了这一障碍,使用预先训练好的模型快速预测了东兰德和西兰德工厂的硫酸盐含量,并在比较东兰德工厂的预测值和真实硫酸盐值时达到了很高的准确度(平均平方误差:0.00124,平均绝对误差:0.0290,R2:0.963)。West Rand 工厂没有真实的硫酸盐值;然而,TL 成功地填补了这些缺失值,并通过提供历史硫酸盐水平迅速完成了 West Rand 数据集。之所以能够做到这一点,是因为所有域(处理厂)之间具有高度的相似性,因为它们具有相似的地理位置、相同的处理工艺、相同的重要特征以及变量之间的相同关系。TL 成功地为 AMD 的硫酸盐水平提供了三个准确的数据集,这是一项重要的成就,可为旨在从 AMD 中回收元素硫、石膏和重要金属等宝贵资源的实验设计提供可靠的数据。
{"title":"The application of transfer machine learning to predict and impute missing sulphate levels in different Acid Mine Drainage treatment plants","authors":"Taskeen Hasrod ,&nbsp;Yannick B. Nuapia ,&nbsp;Hlanganani Tutu","doi":"10.1016/j.clwat.2024.100029","DOIUrl":"10.1016/j.clwat.2024.100029","url":null,"abstract":"<div><p>An accurately pre-trained stacking ensemble machine learning regressor was used to predict sulphate levels in two other Acid Mine Drainage (AMD) treatment plants using Transfer Learning (TL). The model was trained on the large Central Rand (CR) water quality dataset and was used to predict and impute the sulphate levels in the scanty East Rand (ER) and West Rand (W<em>R</em>) datasets which would not have been sufficient to train ML models from scratch. TL was successfully used to overcome this barrier and rapidly predicted sulphate levels in the East Rand and West Rand plants using the pre-trained model and achieved a high level of accuracy (Mean Squared Error:0.00124, Mean Absolute Error:0.0290 and R<sup>2</sup>:0.963) for the East Rand plant when comparing the predicted and true sulphate values. No true sulphate values existed for the West Rand plant; however, TL was successful in imputing these missing values and rapidly completed the West Rand dataset by providing the historic sulphate levels. This was possible due to the high degree of similarity between all domains (treatment plants) since they had similar geographic locations, the same treatment process, possessed the same important features and had the same relationships between variables. TL was successful in providing three accurate datasets for AMD sulphate levels, an important accomplishment towards having reliable data for use in design of experiments aimed at recovering valuable resources such as elemental sulphur, gypsum and important metals from AMD.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100029"},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000279/pdfft?md5=c39a7a24f8f6b6b582c4de57512044b8&pid=1-s2.0-S2950263224000279-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141953136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
LCMS and FTIR profiling of microalga Chlorella sp. for cosmetics and skin care applications 用于化妆品和护肤品的微藻小球藻 LCMS 和傅立叶变换红外光谱分析
Pub Date : 2024-07-19 DOI: 10.1016/j.clwat.2024.100028
Yamuna Ganeson , Primilla Paramasivam , Karthick Murugan Palanisamy , Natanamurugaraj Govindan , Gaanty Pragas Maniam

People are exposed to extreme levels of UV radiation from the sun which gives a harmful effect on the skin. A prevention step should be taken such as applying a protective layer that able to protect the skin from UV rays. Hence, the protective layer should contain the antioxidant components that are able to prevent the formation of free radicals. Microalgae and the bioactive components that can be derived from them are thought to be viable raw material replacements in the cosmetics and pharmaceutical industries. In this study, carotenoid compounds with antioxidant characteristics such as neoxanthin and cryptoxanthin were successfully identified in Chlorella sp. by LC‑QTOF and the compounds have been reported to give a shield from skin aging. Meanwhile, the phenolic compounds were successfully identified through LC‑QTOF in Chlorella sp. that also been reported to be an active compound in sunscreen products. Besides, the identification of polysaccharide compounds was done by FTIR analysis, and the presence of the functional group was successfully identified. Polysaccharides have been reported to be an excellent anti-wrinkles characteristic. The alginate compound was analyses from the identification of a functional group based on the peaks formed. The alginate compound has been an excellent free radical scavenging. Therefore, Chlorella sp. can be applicable for cosmetics and skincare products as the antioxidant compounds such as phenolics compound, carotenoids, and polysaccharides have been identified.

阳光中的紫外线辐射量极高,会对皮肤造成伤害。应该采取预防措施,比如涂抹一层能够保护皮肤免受紫外线伤害的保护层。因此,保护层应含有抗氧化成分,能够防止自由基的形成。微藻和从微藻中提取的生物活性成分被认为是化妆品和制药业中可行的原材料替代品。本研究利用 LC-QTOF 成功鉴定了小球藻中具有抗氧化特性的类胡萝卜素化合物,如新黄素和隐黄素。同时,通过 LC-QTOF 成功鉴定了小球藻中的酚类化合物,据报道这也是防晒产品中的一种活性化合物。此外,还通过傅立叶变换红外光谱分析对多糖化合物进行了鉴定,并成功确定了其中存在的官能团。据报道,多糖具有很好的抗皱特性。海藻酸化合物是根据所形成的峰值来确定官能团的。海藻酸化合物具有很好的清除自由基的作用。因此,小球藻可用于化妆品和护肤品,因为其抗氧化化合物(如酚类化合物、类胡萝卜素和多糖)已被鉴定出来。
{"title":"LCMS and FTIR profiling of microalga Chlorella sp. for cosmetics and skin care applications","authors":"Yamuna Ganeson ,&nbsp;Primilla Paramasivam ,&nbsp;Karthick Murugan Palanisamy ,&nbsp;Natanamurugaraj Govindan ,&nbsp;Gaanty Pragas Maniam","doi":"10.1016/j.clwat.2024.100028","DOIUrl":"10.1016/j.clwat.2024.100028","url":null,"abstract":"<div><p>People are exposed to extreme levels of UV radiation from the sun which gives a harmful effect on the skin. A prevention step should be taken such as applying a protective layer that able to protect the skin from UV rays. Hence, the protective layer should contain the antioxidant components that are able to prevent the formation of free radicals. Microalgae and the bioactive components that can be derived from them are thought to be viable raw material replacements in the cosmetics and pharmaceutical industries. In this study, carotenoid compounds with antioxidant characteristics such as neoxanthin and cryptoxanthin were successfully identified in <em>Chlorella</em> sp. by LC‑QTOF and the compounds have been reported to give a shield from skin aging. Meanwhile, the phenolic compounds were successfully identified through LC‑QTOF in <em>Chlorella</em> sp. that also been reported to be an active compound in sunscreen products. Besides, the identification of polysaccharide compounds was done by FTIR analysis, and the presence of the functional group was successfully identified. Polysaccharides have been reported to be an excellent anti-wrinkles characteristic. The alginate compound was analyses from the identification of a functional group based on the peaks formed. The alginate compound has been an excellent free radical scavenging. Therefore, <em>Chlorella</em> sp. can be applicable for cosmetics and skincare products as the antioxidant compounds such as phenolics compound, carotenoids, and polysaccharides have been identified.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100028"},"PeriodicalIF":0.0,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000267/pdfft?md5=f122e6f9c897d5e1a639a869ad3c73f9&pid=1-s2.0-S2950263224000267-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
State-of-the-art microalgae-based bioreactor wastewater treatment for the elimination of emerging contaminants: A mechanistic review 基于微藻的生物反应器废水处理技术在消除新兴污染物方面的最新进展:机理综述
Pub Date : 2024-07-14 DOI: 10.1016/j.clwat.2024.100027
Sukhendu Dey , Palas Samanta , Apurba Ratan Ghosh , Siddharthasankar Banerjee , Kamalesh Sen

The review article explores the state-of-the-art advancements in using bioreactors based on microalgae to detoxify wastewater, with an emphasis on the removal of various environmental contaminants (VECs). Because of their persistence and capacity for bioaccumulation, these pollutants—which include nutrients, heavy metals, organic compounds, microplastics, Polycyclic Aromatic Hydrocarbons (PAHs), and emerging contaminants—pose serious threats to the environment and human health. Innovative solutions are required since traditional wastewater treatment procedures frequently fail to efficiently eradicate VECs. The review carefully looks at how well microalgae can break down and remove VECs from wastewater. It clarifies the numerous processes, including as biosorption, bioaccumulation, and biotransformation, by which microalgae aid in the elimination of pollutants. Contaminants can be ingested by microalgae, which can then metabolise them into less toxic compounds or incorporate them into biomass. This study examines how adding microalgae to traditional treatment methods can improve both overall treatment effectiveness and operational stability. Operational challenges such as maintaining optimal growth conditions for microalgae, scalability of bioreactor systems, and the need for continuous monitoring and control are thoroughly discussed. The analysis highlights several avenues for future research, such as genetically modifying microalgae strains to enhance pollutant degradation, creating more effective bioreactor designs, and incorporating cutting-edge monitoring systems. The analysis indicates that although microalgae-based bioreactors have great potential to remove VECs, further investigation and developments in technology are needed to fully realise this potential in large-scale wastewater treatment applications. Researchers, environmental engineers, and politicians can benefit greatly from this review, which offers a thorough grasp of the present and potential future applications of microalgae-based bioreactor technology for wastewater treatment.

这篇综述文章探讨了利用基于微藻的生物反应器对废水进行解毒的最新进展,重点是去除各种环境污染物 (VEC)。这些污染物(包括营养物质、重金属、有机化合物、微塑料、多环芳香烃 (PAH) 和新兴污染物)具有持久性和生物累积能力,对环境和人类健康构成严重威胁。由于传统的废水处理程序往往无法有效消除 VECs,因此需要创新的解决方案。本综述仔细研究了微藻分解和去除废水中 VEC 的能力。它阐明了微藻帮助消除污染物的众多过程,包括生物吸附、生物累积和生物转化。污染物可被微藻摄入,然后微藻可将其代谢为毒性较低的化合物或将其融入生物质中。本研究探讨了在传统处理方法中添加微藻如何提高整体处理效果和运行稳定性。研究深入探讨了操作方面的挑战,如保持微藻的最佳生长条件、生物反应器系统的可扩展性以及持续监测和控制的必要性。分析强调了未来研究的几种途径,如通过基因改造微藻菌株来提高污染物降解能力、创造更有效的生物反应器设计以及采用最先进的监测系统。分析表明,尽管基于微藻的生物反应器在去除 VEC 方面具有巨大潜力,但要在大规模废水处理应用中充分发挥这一潜力,还需要进一步的调查和技术开发。研究人员、环境工程师和政治家可以从这篇综述中获益匪浅,因为它提供了对基于微藻的生物反应器技术在废水处理中的当前和未来潜在应用的全面把握。
{"title":"State-of-the-art microalgae-based bioreactor wastewater treatment for the elimination of emerging contaminants: A mechanistic review","authors":"Sukhendu Dey ,&nbsp;Palas Samanta ,&nbsp;Apurba Ratan Ghosh ,&nbsp;Siddharthasankar Banerjee ,&nbsp;Kamalesh Sen","doi":"10.1016/j.clwat.2024.100027","DOIUrl":"10.1016/j.clwat.2024.100027","url":null,"abstract":"<div><p>The review article explores the state-of-the-art advancements in using bioreactors based on microalgae to detoxify wastewater, with an emphasis on the removal of various environmental contaminants (VECs). Because of their persistence and capacity for bioaccumulation, these pollutants—which include nutrients, heavy metals, organic compounds, microplastics, Polycyclic Aromatic Hydrocarbons (PAHs), and emerging contaminants—pose serious threats to the environment and human health. Innovative solutions are required since traditional wastewater treatment procedures frequently fail to efficiently eradicate VECs. The review carefully looks at how well microalgae can break down and remove VECs from wastewater. It clarifies the numerous processes, including as biosorption, bioaccumulation, and biotransformation, by which microalgae aid in the elimination of pollutants. Contaminants can be ingested by microalgae, which can then metabolise them into less toxic compounds or incorporate them into biomass. This study examines how adding microalgae to traditional treatment methods can improve both overall treatment effectiveness and operational stability. Operational challenges such as maintaining optimal growth conditions for microalgae, scalability of bioreactor systems, and the need for continuous monitoring and control are thoroughly discussed. The analysis highlights several avenues for future research, such as genetically modifying microalgae strains to enhance pollutant degradation, creating more effective bioreactor designs, and incorporating cutting-edge monitoring systems. The analysis indicates that although microalgae-based bioreactors have great potential to remove VECs, further investigation and developments in technology are needed to fully realise this potential in large-scale wastewater treatment applications. Researchers, environmental engineers, and politicians can benefit greatly from this review, which offers a thorough grasp of the present and potential future applications of microalgae-based bioreactor technology for wastewater treatment.</p></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"2 ","pages":"Article 100027"},"PeriodicalIF":0.0,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950263224000255/pdfft?md5=5aed0cfab60d31217763ec685fa3ff8f&pid=1-s2.0-S2950263224000255-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141636520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Cleaner Water
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1