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Simultaneous passivation of heavy metals and removal of antibiotic resistance genes by calcium peroxide addition during sewage sludge composting.
Bao, Huanyu; Wang, Jiuhua; Chen, Zhiqiang; Wen, Qinxue; Wu, Yiqi; Fu, Qiqi.
  • Bao H; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, PR China; School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
  • Wang J; School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
  • Chen Z; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, PR China; School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
  • Wen Q; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, PR China; School of Environment, Harbin Institute of Technology, Harbin 150090, PR China. Electronic address: wqxshelly@163.com.
  • Wu Y; Research Institute of Standards and Norms, Ministry of Housing and Urban-Rural Development, Beijing 100835, PR China.
  • Fu Q; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, PR China; School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
Bioresour Technol ; 384: 129267, 2023 Sep.
Article en En | MEDLINE | ID: mdl-37271461
This research evaluated the effects of calcium peroxide (CP) at 0% (CK, w/w), 5% (T1, w/w), and 10% (T2, w/w), on heavy metals (HMs) mobility and prevalence of antibiotic resistance genes (ARGs) during sludge composting. T1 and T2 significantly reduced (p < 0.05) the mobility of Cu (29.34%, and 32.94%, respectively), Ni (24.07%, and 31.48%, respectively) and Zn (33.28%, and 54.11%, respectively) compared to CK after the composting. CP addition resulted in a decrease in mobile genetic elements (MGEs) and ARGs during composting. Together with structural equation model and random forest analysis depicted MGEs had a primary association with total ARGs variations during composting. Microbial analysis indicated CP downregulated the expression of the genes associated with two-component and type IV secretion system, thus reducing the prevalence of ARGs. This study demonstrates that application of CP is a feasible strategy to mitigate both ARGs and HMs hazards during composting.
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Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Compostaje / Metales Pesados Tipo de estudio: Risk_factors_studies Idioma: En Año: 2023 Tipo del documento: Article
Texto completo
Imprimir
XML
PubMed Links
Search on Google

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Compostaje / Metales Pesados Tipo de estudio: Risk_factors_studies Idioma: En Año: 2023 Tipo del documento: Article