Remediation of surface water contaminated by pathogenic microorganisms using calcium peroxide: Matrix effect, micro-mechanisms and morphological-physiological changes

Qiu，Wenhui1,2; Chen，Honghong2; Zhang，Shuwen2; Xiong，Ying2; Zheng，Ming3,4; Zhu，Tingting5; Park，Minkyu6; Magnuson，Jason T.7; Zheng，Chunmiao2; El-Din，Mohamed Gamal4

2022-03-01

10.1016/j.watres.2022.118074

WATER RESEARCH   影响因子和分区

0043-1354

1879-2448

Calcium peroxide (CaO), a common solid peroxide, has been increasingly used in contaminated site remediation due to its ability to release oxygen (O) and hydrogen peroxide (HO) and its environmental friendliness. Our present study is first to explore micromechnisms of CaO to efficaciously inactivate pathogen indicators including gram-negative bacterium of Escherichia coli (E. coli), gram-positive bacterium of Staphylococcus aureus (S. aureus), and virus of Escherichia coli-specific M13 bacteriophage (VCSM13) under low concentration (≤ 4 mmol L (mM)). The inactivation mechanisms of E. coli, S. aureus (1 mmol L CaO) and VCSM13 (4 mmol L) were mainly attributed to OH (32∼58%) and •OH (34∼42%), followed by HO (13∼20%) and O (10∼12%) generated from CaO, with the observed morphological and physiological-associated damages. Also, average steady-state concentrations of (OH, •OH, HO, and O) and their reaction rate constants with E. coli and VCSM13 were determined. Accordingly, the micro-mechanism model of inactivation was established and validated, and the inactivation efficiency of the same order of magnitude of pathogen was predicted. Furthermore, during the common environmental factors, the copper ions was found to be promote CaO inactivation of pathogens, and dissolved organic matter (DOM) fractions had a negative effect on CaO inactivation. The present study explored the mechanisms of CaO inactivation of pathogens in real surface water, laying the foundation for its potential use in the inactivation of water-borne microbial pathogens.

Calcium peroxide Micromechanisms Pathogen inactivation Surface water

SCI ; EI

英语

NI论文

第一

National Key Research and Development Program of China[2021YFA1202500] ; China Postdoctoral Science Foundation[2020M671067] ; Guangdong Basic and Applied Basic Research Foundation[2020A1515110591] ; Shenzhen Science and Technology Innovation Committee["KCXFZ20201221173410029","JCYJ20190809164201686"] ; National Natural Science Foundation of China[42077223] ; Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control[2017B030301012]

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Water Resources

WOS:000758657500003

PERGAMON-ELSEVIER SCIENCE LTD

20220511561127

Escherichia coli ; Metal ions ; Oxidation ; Peroxides ; Physiology ; Rate constants ; Surface waters ; Viruses

Surface Water:444.1 ; Biology:461.9 ; Metallurgy:531.1 ; Chemical Reactions:802.2

ENVIRONMENT/ECOLOGY

2-s2.0-85123574101

Scopus

1.School of Public Health and Emergency Management,Southern University of Science and Technology,Shenzhen,518055,China
2.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Key Laboratory of Organic Compound Pollution Control Engineering,School of Environmental and Chemical Engineering,Shanghai University,Shanghai,200444,China
4.Department of Civil & Environmental Engineering,University of Alberta,Edmonton,T6G 1H9,Canada
5.State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology,Shenzhen Key Laboratory of Emerging Contaminants Detection and Control in Water Environment,Guangdong Engineering Research Center of Low Energy Sewage Treatment,Shenzhen Academy of Environmental Sciences,Shenzhen,518001,China
6.Department of Chemical & Environmental Engineering,University of Arizona,Tucson,1133 E James E Rogers Way, Harshbarger 108,85721-0011,United States
7.Department of Environmental Sciences,University of California,Riverside,92521,United States

Qiu，Wenhui,Chen，Honghong,Zhang，Shuwen,et al. Remediation of surface water contaminated by pathogenic microorganisms using calcium peroxide: Matrix effect, micro-mechanisms and morphological-physiological changes[J]. WATER RESEARCH,2022,211.

Qiu，Wenhui.,Chen，Honghong.,Zhang，Shuwen.,Xiong，Ying.,Zheng，Ming.,...&El-Din，Mohamed Gamal.(2022).Remediation of surface water contaminated by pathogenic microorganisms using calcium peroxide: Matrix effect, micro-mechanisms and morphological-physiological changes.WATER RESEARCH,211.

Qiu，Wenhui,et al."Remediation of surface water contaminated by pathogenic microorganisms using calcium peroxide: Matrix effect, micro-mechanisms and morphological-physiological changes".WATER RESEARCH 211(2022).