Environmental Science: Water Research & Technology最新文献

{"title":"The degradation of 2-methylisobornyl alcohol and geosmin through a micro-nano bubble-activated ozone process: the dual mechanism of enhanced degradation efficiency†","authors":"Yuehua Ren, Yonglei Wang, Xinglin Wang, Baozhen Liu, Guilin He, Yanli Gong, Baosen Liu and Ruibao Jia","doi":"10.1039/D4EW00944D","DOIUrl":"https://doi.org/10.1039/D4EW00944D","url":null,"abstract":"<p >Algal contamination of water sources leads to an increase in odor compounds, such as 2-methylisobornyl alcohol (2-MIB) and geosmin (GSM). In this work, we developed an ozone micro-nano bubble (MNB) system that could remove 94.38% of 2-MIB and 95.45% of GSM in 15 minutes, and these values were 36.11% and 29.56% higher, respectively, than those of the ozone common bubble (CB) system. The MNB technology not only enhanced ozone utilization but also improved mass transfer efficiency. Analysis of degradation products and toxicity revealed that 2-MIB was oxidized, resulting in bridge ring breaking and ring opening. Additionally, the toxicity of the products was significantly lower than that of 2-MIB. Meanwhile, GSM was decomposed into isomers and other double-ringed compounds. Furthermore, a toxicity of 50% of the intermediary products was reduced. The primary mechanism behind the toxicity reduction is superoxide radical oxidation, and superoxide radicals outperformed hydroxyl radicals by 4.88–6.72% in oxidizing capacity. The synergistic effects of MNB-induced volatilization and ozone oxidation in the MNB process accounted for the complete removal of 75% of the compounds. This work provides new insights for the development of deep treatment processes for the removal of taste and odor compounds from drinking water.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1177-1185"},"PeriodicalIF":3.5,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896593","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":"Cyanobacterial biochar modified ceramic membrane for in situ filtration and peroxymonosulfate activation: focusing on interface adjustment and enhanced anti-fouling†","authors":"Kunlun Yang, Dengyang Wang, Yuxuan Yang, Youxiang Pan, Mengsi Wu and Hengfeng Miao","doi":"10.1039/D4EW01059K","DOIUrl":"https://doi.org/10.1039/D4EW01059K","url":null,"abstract":"<p >In this study, a novel catalytic ceramic membrane (ITC-2-800@CM) was modified with Fe/N/S doped cyanobacterial biochar catalysts to adjust its surface morphology and properties to significantly enhance its organic pollutant removal performance and membrane anti-fouling ability. Specifically, the biochar modification further increased the roughness and hydrophobicity of the pristine ceramic membrane, apparently improving the adsorption capacity of hydroxychloroquine (HCQ) causing membrane fouling. Although sacrificing partial membrane permeability, based on the strong peroxymonosulfate (PMS) activation performance of cyanobacterial biochar, abundant reactive oxygen species were generated and degraded the organic pollutants adsorbed on the surface and pore of ITC-2-800@CM. Hence, the efficient synergistic effect between <em>in situ</em> adsorption, filtration and PMS activation further enhanced hydroxychloroquine removal and membrane anti-fouling performance, especially under a long operation. The actual lake water treatment experiments demonstrated that the ITC-2-800@CM–PMS system could stably remove more than 90% of HCQ and reduce the reversible and irreversible membrane fouling resistance by 81.57% and 60.68% as compared to the pristine CM/PMS system. Furthermore, the treated effluent showed significant reduction in total nitrogen, dissolved organic carbon and UV<small>₂₅₄</small> concentrations, highlighting the high applicability of the ITC-2-800@CM–PMS system in practical polluted water treatment. This improvement can decrease the need for frequent membrane cleaning during water treatment, thereby reducing operational costs. This research not only provided an easy method for ceramic membrane modification to extend its operational lifespan, but also offered deeper insights into the synergistic effect between <em>in situ</em> filtration and advanced oxidation.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1163-1176"},"PeriodicalIF":3.5,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896622","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":"Integrated assessment of the elimination of particle-associated fecal indicators in algal–bacterial granule photobioreactors†","authors":"Waleed M. M. El-Sayed, Tengge Zhang, Matthew E. Verbyla and Meng Wang","doi":"10.1039/D4EW00927D","DOIUrl":"https://doi.org/10.1039/D4EW00927D","url":null,"abstract":"<p >Two photo-sequencing batch reactors (PSBR) fed with real wastewater were evaluated to understand the elimination and particle association of fecal indicator bacteria (FIB) and coliphages. The average log<small>₁₀</small> removal of <em>E. coli</em> and <em>Enterococcus</em> spp. were 3.2 and 2.9, respectively, for the PSBR with a low airflow rate of 0.2 LPM (PSBR-L), and 2.8 and 2.7, respectively, for the PSBR with a high airflow rate of 0.5 LPM (PSBR-H). The average log<small>₁₀</small> removals of F-specific and somatic coliphages were 2.9 and 3.2, respectively, for the PSBR-L reactor, and 2.5 and 3.1, respectively, for the PSBR-H reactor. FIB had a maximum association on the 20–0.45 μm particles (46.1–63.3%), while the coliphages had the highest association on the 0.45–0.03 μm particles (44.7–51.2%). The dynamic adaptations in the microbial community structure (16S rRNA gene) were also investigated during the operation period. Genera involved in nutrient removal, such as <em>Thauer</em> spp., and <em>Nitrospira</em> spp., were detected across samples. The outcomes reveal the efficiency of photobioreactors in removing pathogen indicators from real wastewater.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 4","pages":" 994-1006"},"PeriodicalIF":3.5,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ew/d4ew00927d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716617","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":"A comprehensive review of advancements in membrane distillation for liquid separation and hazardous contaminant removal: innovations in design, integration, and performance","authors":"N. Ramkumar and P. Monash","doi":"10.1039/D5EW00036J","DOIUrl":"https://doi.org/10.1039/D5EW00036J","url":null,"abstract":"<p >Technical advancements in membrane distillation (MD) present significant opportunities for efficient liquid separation and removal of hazardous contaminants. Advanced MD systems featuring high-performance, nontoxic, and innovative membrane materials with integrated design configurations achieve near-complete rejection of toxic substances from liquid waste. The adoption of renewable energy sources further enhances environmental sustainability and protects ecosystems and human health by effectively eliminating harmful pollutants from water sources. Despite its potential as a sustainable desalination technology, MD faces persistent challenges related to membrane durability and operational constraints, which hinder its wider application in liquid separation. This review aims to deepen the understanding of emerging MD configurations and their applications in liquid separation, resource recovery, toxic textile effluent treatment, and removal of other hazardous contaminants, as well as to highlight advancements in membrane fabrication, modification, and integration. Emphasis is placed on next-generation MD systems, including high-performance membranes, novel materials, optimized designs, fouling mitigation strategies, and enhanced energy efficiency. The contributions of innovative polymers and eco-friendly solvents to membrane performance and sustainability are also emphasized. In addition, this review explores the prevailing challenges and pathways to optimize advanced MD systems for efficient and sustainable liquid separation and resource recovery.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1086-1136"},"PeriodicalIF":3.5,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896584","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":"Enhancing fault detection in wastewater treatment plants: a multi-scale principal component analysis approach with the Kantorovich distance","authors":"K. Ramakrishna Kini, Fouzi Harrou, Muddu Madakyaru and Ying Sun","doi":"10.1039/D4EW00831F","DOIUrl":"https://doi.org/10.1039/D4EW00831F","url":null,"abstract":"<p >Anomaly detection in wastewater treatment plants (WWTPs) is critical for ensuring their reliable operation and preventing system failures. This paper proposes an advanced monitoring scheme that integrates multiscale principal component analysis (PCA) with a Kantorovich distance (KD)-driven monitoring approach to enhance WWTP monitoring in noisy environments. The combination of wavelet-based multiscale filtering with PCA effectively denoises the data, while the KD-driven scheme offers a robust metric for detecting deviations from normal operating conditions. This approach does not require labeled data and employs the nonparametric Kantorovich distance (KD) test, providing a flexible and practical solution for anomaly detection. Validation using data from the COST benchmark simulation model (BSM1) demonstrates the effectiveness of the proposed methods. The study evaluates different sensor faults—bias, intermittent, and aging—at varying signal-to-noise ratio (SNR) levels and explores the impact of different wavelet bases and decomposition levels on denoising and detection performance. The results show that the proposed scheme outperforms traditional PCA and multiscale PCA-based techniques, offering improved anomaly detection capabilities in the presence of significant noise.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1215-1232"},"PeriodicalIF":3.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ew/d4ew00831f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896595","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":"Drying reduces the total PFAS concentration in biosolids and alters the PFAS profile†","authors":"Patrick J. McNamara, Jessica Calteux, Eric Redman, Taryn McKnight, Lynne Moss, Webster Hoener, Scott Carr and Zhongzhe Liu","doi":"10.1039/D4EW00890A","DOIUrl":"https://doi.org/10.1039/D4EW00890A","url":null,"abstract":"<p >While per- and polyfluoroalkyl substances (PFAS) are not actually generated at water resource recovery facilities (WRRFs), utilities are being forced to consider PFAS in biosolids management plans due to mounting political pressure and pending regulations. Emerging thermal technologies including pyrolysis, gasification, and super critical water oxidation have garnered recent attention for PFAS destruction. Drying, however, is a conventional technology that might also be a tool for utilities to manage PFAS in biosolids, but research on the impacts of drying on PFAS in biosolids is scarce. The objective of this research was to determine how drying affected the fate of PFAS in biosolids. Full-scale sampling was paired with lab-scale oven drying experiments to understand the impact of drying on measurable PFAS in biosolids. Overall, drying substantially reduced the total PFAS concentration in biosolids. PFAS removal during a full-scale facility's drying process matched the removal achieved when solids were taken from that facility and dried in a lab-scale oven instead, with average PFAS removal being approximately 80%. Precursors to perfluoroalkyl acids (PFAAs), primarily 5 : 3 fluorotelomer carboxylic acid (FTCA) and 6 : 2 FTCA, as well as perfluorooctane sulfonic acid (PFOS) were substantially reduced between pre-drying and post-drying triplicate samples. Additional lab-scale oven drying experiments corroborated that measurable PFAS were removed from biosolids collected from three different utilities. Drying experiments at 30 °C and 105 °C revealed that the PFAS profiles were similar, but PFAS concentrations were lower in the 105 °C samples compared to 30 °C samples. While more research is necessary to determine and validate the removal mechanism, drying could be a viable technology to reduce measurable PFAS levels in biosolids to concentrations below guidelines for land application.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 4","pages":" 1007-1015"},"PeriodicalIF":3.5,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ew/d4ew00890a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716614","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":"Effects of an anaerobic membrane bioreactor upset event on nitrogen speciation and microbial community in a downstream phototrophic membrane bioreactor†","authors":"Daniella Saetta, Jason A. Fischer, Ashley Triana, Talon Bullard, Alexandra Smith, Cory J. Spern, Anirudha Dixit, Christina L. Khodadad, Daniel H. Yeh and Luke B. Roberson","doi":"10.1039/D4EW00987H","DOIUrl":"https://doi.org/10.1039/D4EW00987H","url":null,"abstract":"<p >A wastewater treatment architecture with an anaerobic membrane bioreactor and a phototrophic membrane bioreactor was created to close resource loops for use on the Moon and Mars. During an anomaly, an increase of carbon-to-nitrogen ratio led to a shift in the microbial community within PMBR. It is imperative to understand failure modes of the system and the system's ability to respond to perturbations in treatment because of their proposed application in remote, resource-limited locations. During this transient event, the carbon-to-nitrogen ratio in the AnMBR permeate increased from 0.341 to 11.2. Results showed that the microbial community became more diverse during the event and enriched in species related to the remediation of aromatic compounds. The community shift led to conditions required for greater than 90% carbon removal by the PMBR. The inclusion of the PMBR in the treatment architecture increased resilience and robustness for treating high-strength wastewaters in extreme environments.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1200-1214"},"PeriodicalIF":3.5,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896620","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":"Energy-saving scheduling for multiple water intake pumping stations in water treatment plants based on personalized federated deep reinforcement learning†","authors":"Dongsheng Wang, Ao Li, Yicong Yuan, Tingjun Zhang, Liang Yu and Chaoqun Tan","doi":"10.1039/D4EW00685B","DOIUrl":"https://doi.org/10.1039/D4EW00685B","url":null,"abstract":"<p >Urban water treatment plants are among the largest energy consumers in municipal infrastructure, imposing significant economic burdens on their operators. This study employs a data-driven personalized federated learning-based multi-agent attention deep reinforcement learning (PFL-MAADRL) algorithm to address the intake scheduling problem of three water intake pumping stations in urban water treatment plants. Personalized federated learning (PFL) is combined with long short-term memory (LSTM) modeling to create environment models for water plants, focusing on energy consumption, reservoir levels, and mainline pressure. The average accuracies of PFL-based LSTM (PFL-LSTM) models are 0.012, 0.002, and 0.002 higher than those of the LSTM model in the three water plants. Evaluation metrics were established to quantify the effectiveness of each pumping station's energy-efficient scheduling, considering constraints such as reservoir water levels and mainline pressure. The results indicate that the proposed algorithm performs robustly under uncertainties, achieving a maximum energy consumption reduction of 10.6% compared to other benchmark methods.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1260-1270"},"PeriodicalIF":3.5,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ew/d4ew00685b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896642","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":"Usability of waste plastic pyrolysis liquid/oil as a flotation collector in wastewater treatment","authors":"Merve Kalem","doi":"10.1039/D5EW00027K","DOIUrl":"https://doi.org/10.1039/D5EW00027K","url":null,"abstract":"<p >Pyrolysis is an important thermal waste disposal method that is more environmentally friendly than the combustion process, and almost all of its products can be converted into economic value. Specifically, the pyrolysis oils obtained are evaluated in different areas, such as the production of next-generation fuels and the recovery of valuable materials. Wastewater released during marble processing should not be discharged into the sewer without treatment, in accordance with national and international legislation, due to the high concentration of colloidal substances it contains. In the treatment of these wastewaters, conventional chemical precipitation processes and high amounts of synthetic chemicals are commonly used. Another method that can be employed for treating these wastewaters is the chemical substance-assisted flotation process, where efficiency depends on the use of oil-based chemicals. In this study, the treatment of marble processing wastewater was carried out for the first time using the flotation process, with pyrolysis oils obtained from mixed plastic waste pyrolysis as the collector material. According to the treatment experiments, the flotation collector that showed the highest suspended solid (SS) and turbidity removal efficiency was the pyrolysis oil obtained at a pyrolysis temperature of 700 °C. The flotation treatment findings were modeled using experimental design, and it was also revealed that collector dosage, mixing speed and air flow rate significantly affected the removal efficiencies.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1233-1245"},"PeriodicalIF":3.5,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ew/d5ew00027k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896596","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":"Effect of peroxymonosulfate pre-oxidation coupled with subsequent Fe-based coagulation on the mitigation of organic matter and the formation of disinfection by-products†","authors":"Xuan Li, Keyan Liu, Zhe Ren, Zhenqi Du, Rong Xiao, Ruixue Jiang, Xiaochen Li and Tiantian Chen","doi":"10.1039/D4EW01021C","DOIUrl":"https://doi.org/10.1039/D4EW01021C","url":null,"abstract":"<p >The generative ability of abundant reactive species ensures peroxymonosulfate (PMS) pre-oxidation coupled with subsequent Fe-based coagulation (PPFeC) a promising drinking water treatment process, whereas these abundant reactive species can also oxidize chloride in water matrices to form reactive chlorine species (RCS). These RCS can further oxidize organic compounds, resulting in the unexpected cytotoxic and genotoxic disinfection by-product (DBP) formation. Thus, this study investigated the effect of PMS pre-oxidation coupled with subsequent Fe-based coagulation on the mitigation of organic matter and DBP. Here, results showed that the PPFeC process presented better dissolved organic carbon (DOC) removal performance than PMS pre-oxidation and Fe-based coagulation. Compared to Fe<small>³⁺</small>-based coagulation, Fe<small>²⁺</small>-based coagulation resulted in higher DOC removal performance (increased by 63.5% in natural water), higher DBP concentration and water toxicity (increased by 31.3% for the cytotoxicity index and 18.5% for the genotoxicity index in natural water) during the PPFeC process. DBP concentration and toxicity decreased with the increase of the pre-oxidation time, and increased with the increase of PMS concentration. Furthermore, concentration of DBP and toxicity of water initially increased and then decreased with the increase of sedimentation time and coagulant concentration. In addition, compared to SO<small>₄</small>˙<small>⁻</small> and PMS, HO· played a more significant role in the DBP formation and toxicity during the PPFeC process. Therefore, Fe<small>³⁺</small>-based coagulants were reliable to ensure drinking water safety as PMS was applied as the pre-oxidant.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 4","pages":" 972-981"},"PeriodicalIF":3.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716567","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}