Controlling the formation of halogenated byproducts in the chlorination of source waters by oxidative pre-treatment with the Fe(II)/Fe(III)-S(IV)-air system

Truzsi, Alexandra; Kovács, Boglárka; Bodnár, Ildikó; Fábián, István

doi:10.1016/j.ecoenv.2022.114036

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…There are special applications of breakpoint technology found in the literature such as a hybrid approach that integrates struvite crystallization and breakpoint chlorination [60], or the application of oxidative pre-treatment with the Fe(II)/Fe(III)-S(IV)-air system in order to reduce the concentration of organic contaminants (precursors) before breakpoint chlorination are applied [61].…”

Section: The Application Of the Breakpoint Chlorination Technology In...mentioning

confidence: 99%

Optimization of Breakpoint Chlorination Technologies for Drinking Water Treatment: a Hungarian Case Study

Laky,

Neguez

2024

Period. Polytech. Civil Eng.

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Ammonium ion is one of the major pollutants found in drinking water sources in Hungary, especially in deep aquifers. under oxidative conditions, ammonium can transform into nitrite ions in the water system, posing potential health risks. In Hungary mostly biological process or breakpoint chlorination are used to eliminate ammonium ion from raw water during the drinking water treatment process. When breakpoint chlorination is applied, harmful by-products are formed. Trihalomethanes concentrations have long been regulated in Hungary, therefore during the design and optimization of the breakpoint technologies trihalomethane concentrations have been considered. However, haloacetic acids (HAA5) and chlorate ion have been recently regulated in accordance with EU Directive 2020/2184. Chlorate is a by-product that appears in treated water when sodium hypochlorite is used in breakpoint chlorination.Experiments were carried out at four Hungarian case study areas to determine the optimal strategy for breakpoint chlorination: applying higher chlorine dosages with lower contact times, or lower chlorine dosages with higher contact times. The investigations concluded that the preferable dosing strategy is to use lower chlorine concentrations and longer contact times. This approach reduces chemical demand (cost-effective) and has a neutral effect on THMs formation. it can be concluded that when the raw water contains ammonium ion concentrations above 0.5 mg/l, the use of sodium hypochlorite may raise concerns due to elevated chlorate ion levels in the treated water, particularly during summer. Further research is required to expand the optimization strategy, considering not only ammonium and trihalomethane concentrations but also chlorate concentrations.

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Section: The Application Of the Breakpoint Chlorination Technology In...mentioning

confidence: 99%

Optimization of Breakpoint Chlorination Technologies for Drinking Water Treatment: a Hungarian Case Study

Laky,

Neguez

2024

Period. Polytech. Civil Eng.

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Muscovite clay for methylene blue removal: advanced optimization and Al-guided breakthroughs—an independent application from prior antibiotic removal investigation

Lebbihi,

Haddad,

Labiod

et al. 2023

Environ Sci Pollut Res

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Optimizing ciprofloxacin antibiotic adsorption on Algerian mineral clay for water remediation: a Box-Behnken design approach

Lebbihi

Haddad

M’nassri

et al. 2023

Biomass Conv. Bioref.

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Controlling the formation of halogenated byproducts in the chlorination of source waters by oxidative pre-treatment with the Fe(II)/Fe(III)-S(IV)-air system

Cited by 3 publications

References 41 publications

Optimization of Breakpoint Chlorination Technologies for Drinking Water Treatment: a Hungarian Case Study

Optimization of Breakpoint Chlorination Technologies for Drinking Water Treatment: a Hungarian Case Study

Muscovite clay for methylene blue removal: advanced optimization and Al-guided breakthroughs—an independent application from prior antibiotic removal investigation

Optimizing ciprofloxacin antibiotic adsorption on Algerian mineral clay for water remediation: a Box-Behnken design approach

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