PANZhang-bin,ZHANGYing-qin,SUNShao-hua,et al.Characteristics of Halogenated Benzoquinone Disinfection By-products Generated by Chlorination of Humic Acid in Water[J].China Water & Wastewater,2022,38(7):43-50.
Characteristics of Halogenated Benzoquinone Disinfection By-products Generated by Chlorination of Humic Acid in Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第7期
Page:
43-50
Column:
Date of publication:
2022-04-01
- Keywords:
- chlorination disinfection; humic acid; disinfection by-products; halogenated benzoquinones
- Abstract:
- The characteristics and influencing factors of halogenated benzoquinones (HBQs) disinfection by-products such as dichloro-p-benzoquinone (DCBQ), dibromo-p-benzoquinone (DBBQ), 2,3-dibromo-5,6-dimethyl-p-benzoquinone (DBDMBQ) and tetrabromo-p-benzoquinone (TBBQ) generated in chlorination disinfection of humic acid were investigated. The yields of DCBQ and DBBQ from humic acid chlorination were higher than those of DBDMBQ and TBBQ. With the increase of reaction time, the concentrations of four halogenated HBQs showed a rapid increasing trend at first, then tended to be stable and decreased slightly. With the increase of temperature, the formation of HBQs increased. Weakly acidic conditions were favorable for the formation of HBQs. When the dosage of active chlorine was 3-30 mg/L, the concentrations of DCBQ and DBBQ increased with the increase of chlorine dosage, while the concentrations of TBBQ and DBDMBQ increased first and then gradually decreased. With the increase of DOC concentration, the formation of HBQs gradually increased, and the formation potential of HBQs per unit organic matter with molecular weight less than 1 ku was the highest.
Last Update:
2022-04-01