Impacts of permanganate/bisulfite pre-oxidation on DBP formation during the post chlorine disinfection of ciprofloxacin-contaminated waters

Wang, Guiqiao; Shi, Weiye; Ma, Defang; Gao, Baoyu

doi:10.1016/j.scitotenv.2020.138755

Cited by 9 publications

(2 citation statements)

References 49 publications

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“…The positive signal seen for UV use is likely a promotive effect caused by the differences in NOM speciation, TOC concentrations, and the use of chlorinebased disinfectants. Finally, the positive correlation between permanganate and HAA6Br and HAA4 is consistent with research showing that pre-oxidation with permanganate can increase the level of brominated DBPs (Rougé et al, 2020;Wang et al, 2020). This could be explained by the decrease in reactive sites of the NOM after pre-oxidation with permanganate, favoring the rapid bromination of those sites (Rougé et al, 2020).…”

Section: Pre-oxidant and Disinfectant Typessupporting

confidence: 89%

“…HAA4 concentrations tend to rise with permanganate and decline with the use of gaseous chlorine, hypochlorite, and UV. As stated previously, pre‐oxidation with permanganate can increase the level of brominated DBPs (Rougé et al, 2020; Wang et al, 2020), possibly because of a decline in reactive sites of the NOM after pre‐oxidation that favors rapid bromination of those sites (Rougé et al, 2020). This could explain the positive effect seen in Table 3.…”

Section: Resultsmentioning

confidence: 73%

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Characterization and drivers of haloacetic acids in New York State

Sayess

2023

AWWA Water Science

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The formation of disinfection byproducts (DBPs) in finished drinking water is an ongoing challenge for public health agencies and water utilities. The Fourth Unregulated Contaminant Monitoring Rule data were used to assess the prevalence and drivers of haloacetic acids (HAAs)—a class of DBPs—in New York State's (NYS) public water systems, with a focus on total measured (HAA9), regulated (HAA5), brominated (HAA6Br), and unregulated (HAA4) HAAs. The concentrations of all HAA groups in NYS are found to be similar to those nationally, with HAA4 composing approximately 20% of HAA9. Concentrations of all HAA groups are lowest in groundwater and highest in surface waters across NYS systems. Higher total organic carbon (TOC) concentrations lead to elevated HAA9 and HAA5, while higher bromide concentrations favor more HAA4 and HAA6Br. HAA4 concentrations are well predicted with pre‐oxidation/disinfection types, HAA5, TOC, and bromide concentrations, with an adjusted R2 of 70%.

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Section: Pre-oxidant and Disinfectant Typessupporting

confidence: 89%