Effects of hydrogen peroxide preoxidation on clarification and reduction of the microbial load of groundwater and surface water sources for household treatment | Zendy

Kamila Jessie Sammarro Silva | Zendy; Luan de Souza Leite | Zendy; Natália de Melo Nasser Fava | Zendy; Luiz Antônio Daniel | Zendy; Lyda Patrícia Sabogal-Paz | Zendy

Open Access

Effects of hydrogen peroxide preoxidation on clarification and reduction of the microbial load of groundwater and surface water sources for household treatment

Author(s) -

Kamila Jessie Sammarro Silva,

Luan de Souza Leite,

Natália de Melo Nasser Fava,

Luiz Antônio Daniel,

Lyda Patrícia Sabogal-Paz

Publication year - 2021

Publication title -

water science and technology water supply

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 39

eISSN - 1607-0798

pISSN - 1606-9749

DOI - 10.2166/ws.2021.421

Subject(s) - hydrogen peroxide , groundwater , surface water , environmental chemistry , environmental science , water quality , coliphage , water treatment , contamination , microorganism , chemistry , portable water purification , escherichia coli , pulp and paper industry , environmental engineering , bacteria , ecology , biology , organic chemistry , biochemistry , genetics , geotechnical engineering , bacteriophage , gene , engineering

Household water treatment (HWT) technologies are a promising strategy for addressing the waterborne diseases burden. However, in order to be efficient, these are often limited to water quality and require it to not exceed a certain threshold of physicochemical and microbiological contamination. Additionally, some popular HWTs, such as chlorination, are related to by-product formation. Preoxidation may improve source water quality, and hydrogen peroxide (H2O2) is an oxidant that has not been deeply explored in this specific application, so it could be an innovative approach to HWTs. We investigated effects of H2O2 preoxidation in two natural source waters (surface and groundwater), spiked with a high level of microorganisms. Clarification results suggested this pretreatment may improve life of HWTs. Reduction in microbial load of groundwater was considered ineffective, but 5-min H2O2 preoxidation at 15 mg L−1 led to >4.0 log10 inactivation of Phi X174 coliphage and >3.0 of Escherichia coli in surface water. We believe this performance was increased due to the presence of catalysts in the river water. This raised the point that water quality may be not only impairing, but potentially beneficial to the main HWT and characterization is crucial prior to the implementation of any technologies.

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