Mitigating harmful cyanobacterial blooms in drinking water reservoirs through in-situ sediment resuspension

IF 11.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2024-09-24 DOI:10.1016/j.watres.2024.122509

Jiao Fang , Yande Li , Ming Su , Tengxin Cao , Xufeng Sun , Yufan Ai , Jinyi Qin , Jianwei Yu , Min Yang

{"title":"Mitigating harmful cyanobacterial blooms in drinking water reservoirs through in-situ sediment resuspension","authors":"Jiao Fang , Yande Li , Ming Su , Tengxin Cao , Xufeng Sun , Yufan Ai , Jinyi Qin , Jianwei Yu , Min Yang","doi":"10.1016/j.watres.2024.122509","DOIUrl":null,"url":null,"abstract":"<div><div>Mitigating harmful cyanobacterial blooms is a global challenge, particularly crucial for safeguarding source water. Given the limitations of current technologies for application in drinking water reservoirs, we propose an innovative strategy based on in-situ sediment resuspension (SR). This method's effectiveness in cyanobacterial control and its potential impacts on water quality were assessed through laboratory culture experiments and further validated via field applications in five drinking water reservoirs. The results revealed that SR could significantly mitigate cyanobacterial growth, evidenced by the treated sets (removal rate: 3.82×106 cells L−1 d−1) compared to the control set (growth rate: 2.22×107 cells L−1 d−1) according to the laboratory experiments. The underlying mechanisms identified included underwater light reduction (2.38× increase in extinction coefficient) and flocculation and entrainment of cells by resuspended particles (30 % reduction per operation). Additional contributions were noted in the reduction of bioavailable phosphate and remediation of anaerobic sediment characterized by increased redox potential. This facilitated the oxidation of iron, which in turn promoted the co-precipitation of phosphate (removal rate: 46 μg L−1 d−1) and inhibited its release from the sediment. The SR operation, devoid of importing extra substances, represents a safe and economical technology for controlling harmful cyanobacteria in drinking water reservoirs.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"267 ","pages":"Article 122509"},"PeriodicalIF":11.4000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water Research","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0043135424014088","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}

引用次数: 0

Abstract

Mitigating harmful cyanobacterial blooms is a global challenge, particularly crucial for safeguarding source water. Given the limitations of current technologies for application in drinking water reservoirs, we propose an innovative strategy based on in-situ sediment resuspension (SR). This method's effectiveness in cyanobacterial control and its potential impacts on water quality were assessed through laboratory culture experiments and further validated via field applications in five drinking water reservoirs. The results revealed that SR could significantly mitigate cyanobacterial growth, evidenced by the treated sets (removal rate: 3.82×10⁶ cells L⁻¹ d⁻¹) compared to the control set (growth rate: 2.22×10⁷ cells L⁻¹ d⁻¹) according to the laboratory experiments. The underlying mechanisms identified included underwater light reduction (2.38× increase in extinction coefficient) and flocculation and entrainment of cells by resuspended particles (30 % reduction per operation). Additional contributions were noted in the reduction of bioavailable phosphate and remediation of anaerobic sediment characterized by increased redox potential. This facilitated the oxidation of iron, which in turn promoted the co-precipitation of phosphate (removal rate: 46 μg L⁻¹ d⁻¹) and inhibited its release from the sediment. The SR operation, devoid of importing extra substances, represents a safe and economical technology for controlling harmful cyanobacteria in drinking water reservoirs.

Abstract Image

查看原文本刊更多论文

通过原位沉积物重悬浮缓解饮用水水库中的有害蓝藻藻华

减轻有害蓝藻水华是一项全球性挑战，对于保护水源尤为重要。鉴于现有技术在饮用水水库中应用的局限性，我们提出了一种基于原位沉积物再悬浮（SR）的创新策略。通过实验室培养实验评估了该方法在蓝藻控制方面的有效性及其对水质的潜在影响，并通过在五个饮用水水库中的实地应用进一步验证了该方法的有效性。结果表明，根据实验室实验，与对照组（生长率：2.22×107 个细胞 L-1d-1）相比，处理组（去除率：3.82×106 个细胞 L-1d-1）能显著减缓蓝藻的生长。确定的基本机制包括水下光照减少（消光系数增加 2.38 倍）以及细胞被重新悬浮的颗粒絮凝和夹带（每次操作减少 30%）。此外，生物可利用磷酸盐的减少和以氧化还原电位增加为特征的厌氧沉积物的修复也做出了贡献。这促进了铁的氧化，反过来又促进了磷酸盐的共沉淀（去除率：46 μg L-1d-1），并抑制了磷酸盐从沉积物中的释放。SR 操作无需输入额外物质，是控制饮用水水库中有害蓝藻的一种安全、经济的技术。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.