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Abstract:
Ensuring safe drinking water is a global priority, with pathogen control being an essential aspect. Chlorine disinfection is widely adopted for its affordability and potent antimicrobial effects. However, certain bacteria, known as chlorine-resistant bacteria (CRB), can still survive in water systems with residual chlorine, posing risks to water quality and distribution systems. Their emergence, ironically, can be partially attributed to the very application or increased dosage of chlorine disinfectants in certain cases, which unintentionally promoted the selection and adaptation of CRB in the environment. Despite their significance, research on CRB remains fragmented, with few systematic reviews or bibliometric analyses. Thus, this study addresses the gap by analyzing 1367 publications (1984-2025) regarding CRB in drinking water supply systems (DWSSs) using CiteSpace. Important aspects including typical species, potential risks, resistance mechanisms, and inactivation methods are reviewed. Contributions from key countries/institutions/journals/authors are also examined. More importantly, overlooked issues like CRB's impact on taste and odor (T&O) issues in water and their molecular resistance mechanisms are also highlighted. The identification of these gaps in CRB research motivates further studies on their hazards, intrinsic mechanisms and control, which would hopefully help with the delivery of high-quality, safe drinking water worldwide.
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WATER
Year: 2025
Issue: 7
Volume: 17
3 . 0 0 0
JCR@2023
CAS Journal Grade:4
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 2
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