Influence of biochar on heavy metals and microbial community during composting of river sediment with agricultural wastes

•Biochar addition decreased extraction efficiency of DTPA extractable heavy metals.•Biochar significantly influenced bacterial community diversity during composting.•RDA showed the bacterial variation was statistically explained by some parameters.•The biochar could weaken the contribution of temper...

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Bibliographic Details
Published in:Bioresource technology 2017-11, Vol.243, p.347-355
Main Authors: Chen, Yaoning, Liu, Yao, Li, Yuanping, Wu, Yanxin, Chen, Yanrong, Zeng, Guangming, Zhang, Jiachao, Li, Hui
Format: Article
Language:English
Subjects:
Bacterial community
Biochar
Charcoal
Composting
Heavy metals
Metals, Heavy
River sediment
Rivers
Soil
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Summary:•Biochar addition decreased extraction efficiency of DTPA extractable heavy metals.•Biochar significantly influenced bacterial community diversity during composting.•RDA showed the bacterial variation was statistically explained by some parameters.•The biochar could weaken the contribution of temperature to community succession. Studies were performed to evaluate influence of biochar addition on physico-chemical process, heavy metals transformation and bacterial community diversity during composting of sediment with agricultural wastes. Simultaneously, the relationships between those parameters including heavy metals and bacterial community compositions were evaluated by redundancy analysis (RDA). The results show that the extraction efficiency of DTPA extractable heavy metals decreased in both piles, and reduced more in pile with biochar addition about 0.1–2.96%. Biochar addition dramatically influenced the bacterial community structure during the composting process. Moreover, the bacterial community composition was significantly correlated with C/N ratio, water soluble carbon (WSC), and organic matter (OM) (P
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2017.06.100