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Structural transformation and potential toxicity of iron-based deposits in drinking water distribution systems
Zhuang, Yuan; Han, Bingjun; Chen, Ruya; Shi, Baoyou
2019-11-15
Source PublicationWATER RESEARCH
ISSN0043-1354
Volume165Pages:-
AbstractDiscoloration events in drinking water distribution systems (DWDSs) are usually considered an aesthetic issue rather than a health concern, and the potential toxicity of the iron-based particles resuspended from deposits in DWDSs has not been a focus. More importantly, it has not been recognized that the iron based particles may have structural transformation under the complex condition in DWDSs which would further increase their adverse effects. In the present study, iron particle-dominated loose deposits, which were collected from a real DWDSs through pipe flushing, were firstly found to possess obvious toxicity to human liver cells. To further evaluate the potential harms of the deposits, FeOOH crystals (which is one of the most representative components in the deposits of DWDSs) were grown with different types of coexisting matters which may emerge in DWDS5. Results showed that the FeOOH had obvious structure transformation with coexisting matters which further influenced their toxicity: the samples with sharp surfaces had higher toxicity than those with smooth surfaces. Interestingly, although the FeOOH particles formed with perfluorooctanoic acid (FeOOH-PFOA) did not have the sharpest surface or smallest particle size among all the samples, they demonstrated the highest toxicity with strong generation of reactive oxygen species. Experimental and theoretical studies verified that PFOA induced the electron migration around Fe in FeOOH-PFOA particles. The FeOOH-PFOA not only was able to capture electrons directly from DNA, but also generated ROS from O-2 using DNA as an electron donor which might greatly enhance the oxidative damage to cells. This study would broaden the understanding of the potential harms of deposits in DWDS5. (C) 2019 Elsevier Ltd. All rights reserved.
Department中国科学院饮用水科学与技术重点实验室
KeywordLoose deposits Drinking water distribution system Discoloration Iron oxides
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43528
Collection中国科学院饮用水科学与技术重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhuang, Yuan,Han, Bingjun,Chen, Ruya,et al. Structural transformation and potential toxicity of iron-based deposits in drinking water distribution systems[J]. WATER RESEARCH,2019,165:-.
APA Zhuang, Yuan,Han, Bingjun,Chen, Ruya,&Shi, Baoyou.(2019).Structural transformation and potential toxicity of iron-based deposits in drinking water distribution systems.WATER RESEARCH,165,-.
MLA Zhuang, Yuan,et al."Structural transformation and potential toxicity of iron-based deposits in drinking water distribution systems".WATER RESEARCH 165(2019):-.
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