ACS Es&t Water最新文献_第9页

Partitioning Leakage Detection in Water Distribution Systems: A Specialized Deep Learning Framework Enhanced by Spatial–Temporal Graph Convolutional Networks 配水系统中的分区渗漏检测：由时空图卷积网络增强的专业深度学习框架

ACS Es&t Water Pub Date : 2024-07-31 DOI: 10.1021/acsestwater.4c00285

Tianwei Mu, Chunzheng Zhang, Manhong Huang, Baokuan Ning, Junxiang Wang

{"title":"Partitioning Leakage Detection in Water Distribution Systems: A Specialized Deep Learning Framework Enhanced by Spatial–Temporal Graph Convolutional Networks","authors":"Tianwei Mu, Chunzheng Zhang, Manhong Huang, Baokuan Ning, Junxiang Wang","doi":"10.1021/acsestwater.4c00285","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00285","url":null,"abstract":"Effective leakage detection is crucial for ensuring operational efficiency, reducing water loss, and maintaining infrastructure integrity in water distribution systems (WDSs). This study presents a specialized leakage detection approach enhanced by spatial–temporal graph convolutional networks (ST-GCN). This method combines large-scale network partition, optimized sensor placement, pilot-scale network partition, and the ST-GCN model, which captures both spatial and temporal dependencies. Then, two case studies are employed to evaluate the effectiveness of this method. The model achieved an average accuracy, precision, recall, and F1-score of 98.38, 98.89, 97.95, and 98.41% across multiple tests for Network A and of 98.51, 98.51, 98.56, and 98.53% for Network B, respectively, which demonstrate the model’s high performance. Furthermore, it compares the model’s simulation results with three existing methods. The enhanced ST-GCN model is superior to those of the other models in terms of accuracy, confirming its superior effectiveness in detecting leakages.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microalgae Shed Light on Interconnected Nitrogen Transformation in Microalgal-Bacterial Consortia 微藻揭示了微藻-细菌联合体中相互关联的氮转化过程

ACS Es&t Water Pub Date : 2024-07-31 DOI: 10.1021/acsestwater.4c00339

Shengnan Li, Shiyu Zhang, Yun Bai, Xue Li, Shih-Hsin Ho

{"title":"Microalgae Shed Light on Interconnected Nitrogen Transformation in Microalgal-Bacterial Consortia","authors":"Shengnan Li, Shiyu Zhang, Yun Bai, Xue Li, Shih-Hsin Ho","doi":"10.1021/acsestwater.4c00339","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00339","url":null,"abstract":"Nitrogen is a component of many fundamental biomolecules and also participates in environmental redox chemistry. Nitrogen pollution is a serious environmental problem. Biological nitrogen removal is one of the most significant issues in wastewater treatment. Microbial-driven nitrogen transformations are carried out through metabolic pathways. Wastewater treatment systems using microalgal-bacterial cocultures can improve nutrient removal efficiency through interspecies synergistic interactions. However, relevant studies on the nitrogen metabolism and microbial characteristics of microalgal-bacterial systems have not been systematically reviewed and discussed. This Review comprehensively analyzes nitrogen contaminants in various biological nitrogen removal microalgal-bacterial composite systems and summarizes the microbial characteristics and nitrogen-metabolizing enzymes present. Nitrogen metabolism regulation methods involving quorum sensing and genetic regulation are described, and methods of enhancing microbial nitrogen removal through microbial community interactions, enhancing enzyme activity, and promoting electron transfer are introduced in detail. This Review provides a perspective on the improvement and optimization of microalgal-bacterial wastewater treatment technology through analyzing the nitrogen metabolism and increasing process performance.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isotopic Evidence of Denitrified Nitrate in Groundwater beneath Intensive Agriculture and Exchange with Estuary (Godavari, India) 密集型农业下地下水中脱硝硝酸盐的同位素证据以及与河口的交换（印度戈达瓦里河）

ACS Es&t Water Pub Date : 2024-07-31 DOI: 10.1021/acsestwater.4c00338

B. S. K. Kumar, B. Sridevi, V. V. S. S. Sarma, D. Cardinal, Mathieu Sebilo

{"title":"Isotopic Evidence of Denitrified Nitrate in Groundwater beneath Intensive Agriculture and Exchange with Estuary (Godavari, India)","authors":"B. S. K. Kumar, B. Sridevi, V. V. S. S. Sarma, D. Cardinal, Mathieu Sebilo","doi":"10.1021/acsestwater.4c00338","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00338","url":null,"abstract":"Nitrate is accumulated in the groundwater, modified through nitrification/denitrification, and exchanged with coastal/estuarine water bodies. To examine the sources and modifications of nitrate, the concentrations and isotopic composition of nitrate (δ 15N and δ 18ONO3) in the groundwater was monitored at 5 locations along the bank of Godavari estuary and in the estuarine waters for 7 months during wet (August–November) and dry (March–May) periods. Though the concentration of nitrate (NO3–) was higher during the wet than dry periods in both the groundwater and estuary, insignificant seasonal variability was observed in δ15N and δ18ONO3 indicating homogenization through mineralization–immobilization turnover of NO3–. The range of δ15N to δ18O of NO3– indicates soil, manure, and septic waste may be the major source of NO3–. The mean ratio of δ15N/δ18O of 1.1 ± 0.3 indicates the occurrence of denitrification in the groundwater. Concentrations δ15NNO3 and δ18ONO3 of NO3– displayed a significant relation between groundwater and estuarine water suggesting that NO3– is possibly denitrified. This study suggests that denitrified NO3– (enriched δ15N and δ18O) reported in the Godavari estuary may be contributed through submarine groundwater discharge than it is hypothesized to flux from the watershed.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In Situ Simultaneous Generation and Activation of Hydrogen Peroxide by the ZVI-Mn Catalyst for the Degradation of Enrofloxacin ZVI-Mn 催化剂原位同时生成和活化过氧化氢以降解恩诺沙星

ACS Es&t Water Pub Date : 2024-07-30 DOI: 10.1021/acsestwater.4c00442

Jianwang Wu, Mei Lin, Zuliang Chen

{"title":"In Situ Simultaneous Generation and Activation of Hydrogen Peroxide by the ZVI-Mn Catalyst for the Degradation of Enrofloxacin","authors":"Jianwang Wu, Mei Lin, Zuliang Chen","doi":"10.1021/acsestwater.4c00442","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00442","url":null,"abstract":"Fenton oxidation is highly efficient for removing pollutants from wastewater. However, the low utilization efficiency of oxidants increases operating costs and limits their application in water treatment. To address these issues, this study designed a novel Fenton-like catalyst: zerovalent iron/amorphous manganese composites (ZVI-Mn). This catalyst can activate O2 in situ to generate H2O2 and simultaneously activate H2O2 to produce free radicals, achieving a 96.3% removal efficiency of enrofloxacin (ENR) from water. Radical quenching experiments showed that superoxide radicals (•O2–) (46%) play a dominant role in ENR removal, while hydroxyl radicals (•OH) (28.2%) and singlet oxygen (1O2) (25.8%) also participate. Liquid chromatography–mass spectrometry (LC–MS), density functional theory (DFT) calculations, and toxicity estimations demonstrated effective ENR degradation and significant toxicity reduction of the intermediates, primarily through decarboxylation and ring opening. Additionally, ZVI-Mn achieved a 90.1% removal efficiency of ENR in aquaculture wastewater. This study proposes a new Fenton oxidation technique based on the in situ generation of H2O2, providing a meaningful research basis for environmentally friendly water treatment technologies.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Habitat Disturbance Drives the Feedback of Aquatic Plants on the Microbial Community after Lake Degradation 栖息地干扰推动了湖泊退化后水生植物对微生物群落的反馈作用

ACS Es&t Water Pub Date : 2024-07-30 DOI: 10.1021/acsestwater.4c00330

Hongwei Yu, Quanlin Lu, Xiaofeng Cao, Yajun Wang, Yan Xu, Guo Yu, Jianfeng Peng, Jing Qi, Chengzhi Hu, Jiuhui Qu

{"title":"Habitat Disturbance Drives the Feedback of Aquatic Plants on the Microbial Community after Lake Degradation","authors":"Hongwei Yu, Quanlin Lu, Xiaofeng Cao, Yajun Wang, Yan Xu, Guo Yu, Jianfeng Peng, Jing Qi, Chengzhi Hu, Jiuhui Qu","doi":"10.1021/acsestwater.4c00330","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00330","url":null,"abstract":"Globally intensified lake system degradation has been attributed to high-intensity disturbance and emerged as a significant driver of the declines in lake biodiversity and ecosystem stability. However, potential alterations in feedback mechanisms between aquatic plants and microorganisms after ecological succession are still unclear. This study delves into the influence of aquatic plants on sediment bacterial diversity and nutrient dynamics across different growth phases using Illumina MiSeq sequencing and diffusive gradients in thin film analysis. Our results indicate that the surface temperature of the research area has increased from 20 to 28 °C over the past 25 years, and the dominant species has shifted to Stuckenia pectinata. Constructive species show responsive changes in their organ’s stoichiometric characteristics to adapt to environmental changes. The growth of S. pectinata could affect the diffusion fluxes of NH4+–N, NO3––N, P, and Fe at the sediment–water interface. Morever, the deterministic processes of environmental filtering and competition may have altered the microorganisms in the rhizosphere of S. pectinata, temperature, and water depth were major drivers of seasonal microbial changes. These results in the driver-response relationship of multiple stressors in the lake ecosystem may contribute to the development of engineering projects focusing on restoring aquatic plants.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"187 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zinc Orthophosphate Can Reduce Nitrate-Induced Corrosion of Lead Solder 正磷酸锌可减少硝酸盐对铅焊料的腐蚀

ACS Es&t Water Pub Date : 2024-07-30 DOI: 10.1021/acsestwater.3c00786

Kathryn G. Lopez, Jinghua Xiao, Christopher Crockett, Christian Lytle, Haley Grubbs, Marc Edwards

{"title":"Zinc Orthophosphate Can Reduce Nitrate-Induced Corrosion of Lead Solder","authors":"Kathryn G. Lopez, Jinghua Xiao, Christopher Crockett, Christian Lytle, Haley Grubbs, Marc Edwards","doi":"10.1021/acsestwater.3c00786","DOIUrl":"https://doi.org/10.1021/acsestwater.3c00786","url":null,"abstract":"Nitrate-induced spallation of lead-bearing solder particles into drinking water is not sufficiently controlled by phosphate-based inhibitors, although adding zinc can improve their performance. Studies using copper coupons coated with new lead–tin solder in water with up to 12 mg/L nitrate demonstrated that zinc orthophosphate reduced lead release by more than 90% and outperformed orthophosphate alone. Lead release and spallation from harvested pipes with decades-old lead–tin solder in a high nitrate water were improved but not eliminated with zinc orthophosphate over a period of months. When applied at a water utility with high source water nitrate, monthly in-home field sampling showed that 90th percentile lead levels dropped below the action level after dosing zinc orthophosphate at full scale for 6 months. Scanning electron microscopy (SEM) analysis of pipe scales revealed that zinc and orthophosphate codeposit at the copper–solder interface and may act as a mixed inhibitor, with zinc inhibiting the cathodic reaction on the copper pipe, phosphate limiting the anodic reaction, and an added benefit of zinc orthophosphate preferentially precipitating at the galvanic interface between the anode and the cathode. Updates to corrosion control guidance for waters with higher nitrate due to seasonal runoff or source water changes are needed.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microbial Contamination of Surface Water and Groundwater in Flood-Impacted Rural Communities in South Texas Following Hurricane Hanna 飓风汉娜过后得克萨斯州南部受洪水影响的农村社区地表水和地下水的微生物污染情况

ACS Es&t Water Pub Date : 2024-07-29 DOI: 10.1021/acsestwater.4c00143

Arash Jafarzadeh, Sina Vedadi Moghadam, Dipti Anik Dhar, Dorina Murgulet, Vikram Kapoor

{"title":"Microbial Contamination of Surface Water and Groundwater in Flood-Impacted Rural Communities in South Texas Following Hurricane Hanna","authors":"Arash Jafarzadeh, Sina Vedadi Moghadam, Dipti Anik Dhar, Dorina Murgulet, Vikram Kapoor","doi":"10.1021/acsestwater.4c00143","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00143","url":null,"abstract":"Hurricane Hanna brought unprecedented rainfall and flooding to Texas in 2020. Our study evaluated microbial contamination in surface water (SW) and groundwater (GW) across rural communities in Rio Grande Valley (RGV) and Baffin Bay using both culture-based and qPCR methods. Sampling began immediately after the landfall of Hurricane Hanna (August 2020) and until the end of the summer monsoon (August 2021). High concentrations of culturable Escherichia coli and total coliforms were detected during summer monsoon for both surface and GW. E. coli and enterococci were present in all SW samples in RGV. Enterococci was detected in all SW samples collected from BB; however, E. coli was detected in 81% of samples. Like SW, concentration of E. coli and enterococci markers in GW samples were high in RGV. The human-associated fecal marker (HF183) was detected in both SW and GW but mainly in RGV during the dry period. HF183 exhibited a low to moderate correlation with conventional fecal indicators, suggesting the uncertainty of enterococci and E. coli for detection of human fecal pollution. In general, the outcomes of this study serve as foundational data for subsequent investigations aimed at overseeing both established and evolving public health concerns for Texas residents.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular Dynamics Study into Lithium-Ion Recovery from Battery Wastewater Using Flow Capacitive Deionization and a ZIF-8-Coated Cation Exchange Membrane 利用流式电容去离子法和 ZIF-8 包覆阳离子交换膜从电池废水中回收锂离子的分子动力学研究

ACS Es&t Water Pub Date : 2024-07-29 DOI: 10.1021/acsestwater.4c00087

Terence Zhi Xiang Hong, Kexin Tang, Liming You, Taoqin Chen, Hieu Trung Kieu, Shane Allen Snyder, Kun Zhou

{"title":"Molecular Dynamics Study into Lithium-Ion Recovery from Battery Wastewater Using Flow Capacitive Deionization and a ZIF-8-Coated Cation Exchange Membrane","authors":"Terence Zhi Xiang Hong, Kexin Tang, Liming You, Taoqin Chen, Hieu Trung Kieu, Shane Allen Snyder, Kun Zhou","doi":"10.1021/acsestwater.4c00087","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00087","url":null,"abstract":"Molecular dynamics (MD) simulations are conducted to assess the Li recovery performance of three zeolitic imidazolate frameworks (ZIFs) employed as selective layers in cation exchange membranes (CEMs) for flow capacitive deionization (FCDI). The three ZIFs (ZIF-8, ZIF-8-Cl, and ZIF-8-Br) share a common metal node (Zn node) but differ in their functional groups on the imidazolate linkers (CH3, Cl, and Br). The performance of the ZIFs is evaluated based on their Li+/Na+ selectivity, determined by calculating the number of Li+ and Na+ ions in the flow-electrode. The adsorption of cations by the ZIFs is also investigated using graphs and contour maps depicting the ZIF–cation interaction energy. Additionally, the simulation results are validated through experiments involving the quantification of cation concentration in the feed solution. The results indicate that Li+/Na+ selectivity depends on the cation affinity of the ZIF. It is preferable to recover Li+ ions from the flow-electrode than from the CEM. Moreover, cations require external energy to enter the pores as they experience repulsion. To achieve high Li+/Na+ selectivity in the flow-electrode, the ZIF selective layers should exhibit a stronger affinity for Na+ than for Li+. Additionally, the cavities at the surface of the ZIFs should be sufficiently small to restrict Na+ entry. Overall, MD simulations are valuable for understanding the mechanisms necessary to achieve high Li+/Na+ selectivity in ZIFs for FCDI applications. Among the three ZIFs tested, ZIF-8-Br exhibits the highest Li+/Na+ selectivity in both simulations and experiments.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"95 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effective Removal of Enteric Viruses by Moringa oleifera Seed Extract Functionalized Cotton Filter 油辣木籽提取物功能化棉过滤器能有效去除肠道病毒

ACS Es&t Water Pub Date : 2024-07-29 DOI: 10.1021/acsestwater.4c00194

Chamteut Oh, Gang Zheng, Laxmicharan Samineni, Manish Kumar, Thanh H. Nguyen

{"title":"Effective Removal of Enteric Viruses by Moringa oleifera Seed Extract Functionalized Cotton Filter","authors":"Chamteut Oh, Gang Zheng, Laxmicharan Samineni, Manish Kumar, Thanh H. Nguyen","doi":"10.1021/acsestwater.4c00194","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00194","url":null,"abstract":"Accessible and low-cost point-of-use water treatment technology have significant potential to mitigate the risk to public health, particularly in areas with limited resources and in disaster scenarios. Natural cotton fibers functionalized with water-soluble proteins from Moringa oleifera seeds (MO-cotton filter) are a promising technology that exhibits high water permeability and effective removal of various contaminants.. Here, we demonstrated the performance of MO-cotton filters under practically relevant conditions to remove mammalian virus spiked in groundwater. Specifically, MO-cotton filters achieved >3.2-log10 reduction at a superficial velocity of 0.7 m/h of two mammalian viruses, Tulane virus (TV, Caliciviridae, nonenveloped virus) and Transmissible gastroenteritis virus (TGEV, Coronaviridae, enveloped virus), which are representative of a significant portion of waterborne illnesses. We further evaluated the risk of virus particles detached due to shear forces by testing their infectivity and found that the viruses accumulated on the MO-cotton filters pose a minimal risk of contaminating the drinking water source. These findings support that the MO-cotton filter can serve as a point-of-use water purification technology, effectively reducing viruses to a safe drinking water level.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel E-Peroxone Process with Tandem Flow-Through Configuration: In Situ O2 Supplement and Efficient Ozone Utilization 采用串联直通配置的新型电子培罗酮工艺：原位氧气补充和高效臭氧利用

ACS Es&t Water Pub Date : 2024-07-29 DOI: 10.1021/acsestwater.4c00155

Zhao Zhang, Zhengkun Tang, Chensi Shen, Juan Zhou, Xiang-Zhou Meng, Fang Li

{"title":"Novel E-Peroxone Process with Tandem Flow-Through Configuration: In Situ O2 Supplement and Efficient Ozone Utilization","authors":"Zhao Zhang, Zhengkun Tang, Chensi Shen, Juan Zhou, Xiang-Zhou Meng, Fang Li","doi":"10.1021/acsestwater.4c00155","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00155","url":null,"abstract":"A novel E-peroxone process with tandem flow-through (TFT) configuration was developed in this work, and its efficacy was verified via the degradation of recalcitrant compounds, i.e., dyes and poly(vinyl alcohol) (PVA). The gas diffusion electrode (GDE) made of carbon fiber was employed as the cathode, while the anode of ruthenium–iridium acted as a dimensionally stable anode (DSA). The system achieved oxygen self-sufficiency through an innovative oxygen transfer mode, avoiding the need for an additional oxygen supply. The electrodes with TFT configuration ensured high utilization efficiency of ozone as the peroxone reaction occurred continuously in two adjacent chambers. H2O2 yield efficiency was compared between single and TFT E-peroxone processes under various conditions, including flow rates, current densities, and pH values. Under optimal H2O2 production conditions, the TFT E-peroxone process could remove 85.5% of dyes and 73.4% of PVA with single-pass, respectively. Electron paramagnetic resonance (EPR) tests and quenching experiments revealed that hydroxyl radicals (•OH) and carbon radicals are the primary active species. Hydroxyl radicals played a major role in the single and TFT E-peroxone processes. This study demonstrates that the TFT E-peroxone process holds great promise as an advanced technology for efficient wastewater treatment.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0