Wenjun Du, Xin Xu, Lili An, Feng Yan, J Paul Chen, Ruihua Dai
{"title":"通过氧化强化混凝法同时去除铜绿微囊藻和微塑料","authors":"Wenjun Du, Xin Xu, Lili An, Feng Yan, J Paul Chen, Ruihua Dai","doi":"10.1016/j.envpol.2024.125555","DOIUrl":null,"url":null,"abstract":"The composite pollution is an increasingly severe challenge in the field of water treatment. Especially, microplastics (MPs) contamination and <em>Microcystis aeruginosa</em> (<em>M. aeruginosa</em>) were verified that they could synergistically pose a serious threat to safety of drinking water. Therefore, developing effective removal technology is an urgent task. In this study, the simultaneous removal of <em>M. aeruginosa</em> and polystyrene (PS, a typical plastic matter) was investigated by H<sub>2</sub>O<sub>2</sub> enhanced Fe(II) coagulation. The results demonstrated that the removal rate of both algae and PS can reach over 90%. It was also demonstrated that the PS removal efficiency increased from 23.3% to 97.3% with the increase of <em>M. aeruginosa</em> biomass from 0 cells/mL to 0.5×10<sup>6</sup> cells/mL. The possible reason might be that the addition of algal cells raises the number of contaminant particles, which greatly increases the floc size during the coagulation process. It makes MPs easier to be trapped by sweep flocculation in this process. Additionally, naturally weathered polystyrene (NWPS) exhibited higher removal rate than virgin PS, due to more original functional groups, larger particle size (d<sub>50</sub> 9.75 μm to 11.25 μm), and a lower absolute zeta potential (-34.15 mV to -30.1 mV). Furthermore, low Fe residue level and AOM (algal organic matter) control was simultaneously achieved in this process (TOC < 1 mg/L, MCs < 1 μg/L). Therefore, this study suggests that the H<sub>2</sub>O<sub>2</sub>-Fe(II) process is an efficient and green technology for the removal of <em>M. aeruginosa</em> and PS composite pollutants without secondary pollution, which is promising technology in drinking water treatment plant.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"25 1","pages":""},"PeriodicalIF":7.6000,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Simultaneous removal of Microcystis aeruginosa and microplastics by oxidation enhanced coagulation\",\"authors\":\"Wenjun Du, Xin Xu, Lili An, Feng Yan, J Paul Chen, Ruihua Dai\",\"doi\":\"10.1016/j.envpol.2024.125555\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The composite pollution is an increasingly severe challenge in the field of water treatment. Especially, microplastics (MPs) contamination and <em>Microcystis aeruginosa</em> (<em>M. aeruginosa</em>) were verified that they could synergistically pose a serious threat to safety of drinking water. Therefore, developing effective removal technology is an urgent task. In this study, the simultaneous removal of <em>M. aeruginosa</em> and polystyrene (PS, a typical plastic matter) was investigated by H<sub>2</sub>O<sub>2</sub> enhanced Fe(II) coagulation. The results demonstrated that the removal rate of both algae and PS can reach over 90%. It was also demonstrated that the PS removal efficiency increased from 23.3% to 97.3% with the increase of <em>M. aeruginosa</em> biomass from 0 cells/mL to 0.5×10<sup>6</sup> cells/mL. The possible reason might be that the addition of algal cells raises the number of contaminant particles, which greatly increases the floc size during the coagulation process. It makes MPs easier to be trapped by sweep flocculation in this process. Additionally, naturally weathered polystyrene (NWPS) exhibited higher removal rate than virgin PS, due to more original functional groups, larger particle size (d<sub>50</sub> 9.75 μm to 11.25 μm), and a lower absolute zeta potential (-34.15 mV to -30.1 mV). Furthermore, low Fe residue level and AOM (algal organic matter) control was simultaneously achieved in this process (TOC < 1 mg/L, MCs < 1 μg/L). Therefore, this study suggests that the H<sub>2</sub>O<sub>2</sub>-Fe(II) process is an efficient and green technology for the removal of <em>M. aeruginosa</em> and PS composite pollutants without secondary pollution, which is promising technology in drinking water treatment plant.\",\"PeriodicalId\":311,\"journal\":{\"name\":\"Environmental Pollution\",\"volume\":\"25 1\",\"pages\":\"\"},\"PeriodicalIF\":7.6000,\"publicationDate\":\"2024-12-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Pollution\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1016/j.envpol.2024.125555\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Pollution","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.envpol.2024.125555","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Simultaneous removal of Microcystis aeruginosa and microplastics by oxidation enhanced coagulation
The composite pollution is an increasingly severe challenge in the field of water treatment. Especially, microplastics (MPs) contamination and Microcystis aeruginosa (M. aeruginosa) were verified that they could synergistically pose a serious threat to safety of drinking water. Therefore, developing effective removal technology is an urgent task. In this study, the simultaneous removal of M. aeruginosa and polystyrene (PS, a typical plastic matter) was investigated by H2O2 enhanced Fe(II) coagulation. The results demonstrated that the removal rate of both algae and PS can reach over 90%. It was also demonstrated that the PS removal efficiency increased from 23.3% to 97.3% with the increase of M. aeruginosa biomass from 0 cells/mL to 0.5×106 cells/mL. The possible reason might be that the addition of algal cells raises the number of contaminant particles, which greatly increases the floc size during the coagulation process. It makes MPs easier to be trapped by sweep flocculation in this process. Additionally, naturally weathered polystyrene (NWPS) exhibited higher removal rate than virgin PS, due to more original functional groups, larger particle size (d50 9.75 μm to 11.25 μm), and a lower absolute zeta potential (-34.15 mV to -30.1 mV). Furthermore, low Fe residue level and AOM (algal organic matter) control was simultaneously achieved in this process (TOC < 1 mg/L, MCs < 1 μg/L). Therefore, this study suggests that the H2O2-Fe(II) process is an efficient and green technology for the removal of M. aeruginosa and PS composite pollutants without secondary pollution, which is promising technology in drinking water treatment plant.
期刊介绍:
Environmental Pollution is an international peer-reviewed journal that publishes high-quality research papers and review articles covering all aspects of environmental pollution and its impacts on ecosystems and human health.
Subject areas include, but are not limited to:
• Sources and occurrences of pollutants that are clearly defined and measured in environmental compartments, food and food-related items, and human bodies;
• Interlinks between contaminant exposure and biological, ecological, and human health effects, including those of climate change;
• Contaminants of emerging concerns (including but not limited to antibiotic resistant microorganisms or genes, microplastics/nanoplastics, electronic wastes, light, and noise) and/or their biological, ecological, or human health effects;
• Laboratory and field studies on the remediation/mitigation of environmental pollution via new techniques and with clear links to biological, ecological, or human health effects;
• Modeling of pollution processes, patterns, or trends that is of clear environmental and/or human health interest;
• New techniques that measure and examine environmental occurrences, transport, behavior, and effects of pollutants within the environment or the laboratory, provided that they can be clearly used to address problems within regional or global environmental compartments.