Effects of biochar on the degradation of organophosphate esters in sewage sludge aerobic composting

In this study, the impact of biochar on the degradation of organophosphate esters (OPEs) during the aerobic composting of sewage sludge was investigated. Three treatments were conducted with different percentages of biochar in the compost, including 5 %, 10 %, and 20 %. The treatment with 10 % of bi...

Full description

Saved in:
Bibliographic Details
Published in:Journal of hazardous materials 2023-01, Vol.442, p.130047-130047, Article 130047
Main Authors: Pang, Long, Huang, Ziling, Yang, Peijie, Wu, Mingkai, Zhang, Yanyan, Pang, Rong, Jin, Baodan, Zhang, Ruiming
Format: Article
Language:English
Subjects:
Aerobic composting
Biochar
Degradation
Organophosphate esters
Sewage sludge
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, the impact of biochar on the degradation of organophosphate esters (OPEs) during the aerobic composting of sewage sludge was investigated. Three treatments were conducted with different percentages of biochar in the compost, including 5 %, 10 %, and 20 %. The treatment with 10 % of biochar showed the longest thermophilic phase compared to that of 5 % and 20 % of biochar, which greatly promoted the decomposition of organic matter. In addition, the degradation rate of the hard-to-degrade chlorinated-OPEs was significantly increased by 10 % biochar, reaching to 57.2 %. Correspondingly, approximately 43.6 % of the total concentration of OPEs (Σ6OPEs) was eliminated in the presence of 10 % of biochar, which was higher than the treatments with 5 % and 20 % of biochar. Biochar significantly influenced the microbial community structure of compost, but the previously reported organophosphorus-degrading bacteria did not play a major role in the degradation of OPEs. The redox ability of the increased oxygen-containing functional groups such as quinone on the surface of biochar and the biochar-mediated electron transfer ability may play an essential role in the degradation of OPEs during the composting process. [Display omitted] •The addition of biochar significantly promoted the degradation of OPEs.•Treatment with 10 % of biochar had the highest degradation rate on OPEs.•The degradation rate of chlorinated OPEs was higher than alkyl-and aryl-OPEs.•Oxygen-containing groups of aged biochar can degrade OPEs through redox reaction.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2022.130047