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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Silva, Kamila Jessie Sammarro [1] ; Leite, Luan de Souza [1] ; Fava, Natalia de Melo Nasser [1] ; Daniel, Luiz Antonio [1] ; Sabogal-Paz, Lyda Patricia [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Hydraul & Sanitat, 400 Trabalhador Sao Carlense Ave, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY; DEC 2021.
Web of Science Citations: 0
Abstract

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, 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 log(10) 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. (AU)

FAPESP's process: 19/05759-1 - Study of Algal Organic Matter (AOM) removal by coagulation-flocculation and use of pre-treatments
Grantee:Luan de Souza Leite
Support Opportunities: Scholarships in Brazil - Doctorate