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Review
. 2021 Feb 1:754:141955.
doi: 10.1016/j.scitotenv.2020.141955. Epub 2020 Aug 27.

Impacts of pre-oxidation on the formation of disinfection byproducts from algal organic matter in subsequent chlor(am)ination: A review

Affiliations
Review

Impacts of pre-oxidation on the formation of disinfection byproducts from algal organic matter in subsequent chlor(am)ination: A review

Feilong Dong et al. Sci Total Environ. .

Abstract

Algae cells and algal organic matter (AOM) present in algae impacted source water pose a serious threat to the safety of drinking water. Conventional water treatment processes poorly remove AOM that can transform to harmful disinfection byproducts (DBPs) during ensuing disinfection. This article offers a comprehensive review on the impacts of pre-oxidation on the formation of DBPs from AOM in subsequent chlor(am)ination. Various characterization techniques for algal cells and AOM are first overviewed with an effort to better understanding of correlation between the AOM properties and downstream DBP formation. Then, the present work reviews recent studies on application of different pre-oxidation technologies, such as chlor(am) ination, UV irradiation, ozonation, ferrate (VI), permanganate oxidation and UV-based advanced oxidation processes (AOPs), to remove algal cells and degrade AOM. Pre-oxidation can reduce the stability of algal cells and inactivate algal cells for promoting cell aggregation and thus favoring coagulation. Meanwhile, pre-oxidation can mitigate and degrade AOM into small molecular weight organic compounds to reduce DBP formation potential during subsequent chlor(am)ination. Finally, this review provides an overall evaluation on the applicability of different pre-oxidation processes, and identifies future research demands.

Keywords: Algal organic matter; Characterization; Disinfection byproducts; Pre-oxidation.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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