Algal organic matter as a disinfection by-product precursor during chlor(am)ination: a critical review

Leite, Luan de Souza; Daniel, Luiz Antonio; Bond, Tom

doi:10.1039/d3ew00674c

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2024

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Cited by 3 publications

References 83 publications

(251 reference statements)

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Climate Change Implications for DBP Occurrence in Municipal Drinking Water

Emelko,

Chow,

Amiri

et al. 2024

The Handbook of Environmental Chemistry

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Climate Change Implications for DBP Occurrence in Municipal Drinking Water

Emelko,

Chow,

Amiri

et al. 2024

The Handbook of Environmental Chemistry

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Nanomaterials in aquaculture disinfection, water quality monitoring and wastewater remediation

Silvanir,

Foo,

Chia

et al. 2024

Journal of Environmental Chemical Engineering

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Photocatalytic Degradation of Algal Organic Matter Using TiO2/UV and Persulfate/UV

Leite,

Hoffmann,

dos Santos

et al. 2024

Water

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Eutrophication in water reservoirs releases algal organic matter (AOM), a key precursor to the formation of disinfection by-products (DBPs) during the disinfection process. Typical drinking water treatment is not efficient for AOM removal, and advanced treatments are necessary for the removal of residual AOM before chlorination. UV-based technology with PS and TiO2 is widely used as a pre-oxidation step in water treatment; however, no publications have focused on them for AOM degradation. In this context, this work investigated the effect of oxidant concentration (0.1 to 0.5 g∙L−1) and pH (6 to 10) on AOM degradation with TiO2/UV and persulfate (PS)/UV using response surface methodology. In general, PS/UV was more effective in removing protein, while TiO2/UV was more effective in carbohydrate degradation. TiO2/UV removals varied from 27 to 57% for protein and from 48 to 86% for carbohydrates. The optimal condition (57% for protein and 86% for carbohydrates) was obtained using 0.5 g∙L−1 TiO2 at pH 10. PS/UV removals varied from 33 to 81% for protein and from 24 to 53% for carbohydrates. The optimal condition (81% for protein and 53% for carbohydrates) was obtained using 0.5 g∙L−1 PS concentration at pH 8. Degradation kinetics showed a good fit to the pseudo-first-order model (R2 > 95%) for both processes. The DBP formation reductions observed with TiO2/UV—trihalomethane (THM) (85 to 86%) and chloral hydrate (CH) (94 to 96%)—were similar to the efficiencies observed for PS/UV—THM (87 to 89%) and CH (83 to 88%). These results show the efficiency of UV-based technology for AOM degradation and the control of DBP formation.

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Algal organic matter as a disinfection by-product precursor during chlor(am)ination: a critical review

Abstract: Algal organic matter (AOM) is a major precursor of disinfection by-products (DBPs) during disinfection.

Cited by 3 publications

References 83 publications

Climate Change Implications for DBP Occurrence in Municipal Drinking Water

Climate Change Implications for DBP Occurrence in Municipal Drinking Water

Nanomaterials in aquaculture disinfection, water quality monitoring and wastewater remediation

Photocatalytic Degradation of Algal Organic Matter Using TiO2/UV and Persulfate/UV

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