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Fate and biodegradation characteristics of triclocarban in wastewater treatment plants and sewage sludge composting processes and risk assessment after entering the ecological environment.

Authors :
Zheng, Guodi
Yu, Bao
Wang, Yuewei
Ma, Chuang
Chen, Tongbin
Source :
Journal of Hazardous Materials. Jun2021, Vol. 412, pN.PAG-N.PAG. 1p.
Publication Year :
2021

Abstract

Triclocarban (TCC) has a high detection frequency in soil, rivers, sediments, and organisms, and its ecological risks have attracted substantial attention. In this study, we analyzed the fate of TCC in four wastewater treatment plants (WWTPs) in Zhengzhou, China, the biodegradation characteristics during the composting process, and the ecological risks of TCC when entering different environmental compartments. The concentration of TCC in the influent was 731.1–812.4 ng/L. More than 53.4% of TCC was biodegraded during the wastewater treatment process, and less than 2.5% was retained in the effluent. TCC was effectively removed through microbial degradation and sewage sludge absorption, and there were only minor differences in the different wastewater treatment processes. It is worth noting that more than 38% of TCC was enriched in sewage sludge (1430.1–1663.8 ng/g). The corresponding biodegradation rates of TCC were 65.7% and 82.8% in sewage sludge after 17 days of composting treatment with sawdust and straw as bulking agents, respectively. The estimated results showed that effluent discharge into the city rivers was safe. Composting could effectively degrade TCC and decrease the ecological risk of TCC when applied to sewage sludge. [Display omitted] • More than 97% of TCC in wastewater is reduced after treatment. • More than 38% of TCC in wastewater is transferred into sewage sludge. • Composting is an effective way to degrade TCC in sewage sludge. • The risk of TCC is predicted in aquatic and terrestrial environments. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03043894
Volume :
412
Database :
Academic Search Index
Journal :
Journal of Hazardous Materials
Publication Type :
Academic Journal
Accession number :
149919317
Full Text :
https://doi.org/10.1016/j.jhazmat.2021.125270