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Sci Total Environ. 2019 Feb 15;651(Pt 1):796-806. doi: 10.1016/j.scitotenv.2018.09.098. Epub 2018 Sep 8.

Long-term effect of biochar amendment on the biodegradation of petroleum hydrocarbons in soil microbial fuel cells.

Author information

1
Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin 300191, China; MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China. Electronic address: lixiaojing@caas.cn.
2
Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin 300191, China.
3
Agro-Environmental Protection Institute, Ministry of Agriculture, MOA Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Tianjin 300191, China; College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China. Electronic address: yongtao@scau.edu.cn.

Abstract

Biochar is extensively applied in amendment of contaminated soils. However, the effect of biochar on the biodegradation of petroleum hydrocarbons and electricity generation in soil microbial fuel cells (MFCs) remains unclear. Here, three biochars respectively derived from poultry (chicken manure, CB), agriculture (wheat straw, SB) and forestry industries (wood sawdust, WB) were investigated after 223 days of amendment. Consequently, high removal for alkanes was in CB with the mineral nutrition and phosphorus while aromatics were in SB with the most N content and the highest molecular polarity. The lowest removal efficiency of total petroleum hydrocarbons was observed in WB with the highest surface area, whereas the most charge was obtained. The different performance of soil MFCs was due to physicochemical properties of biochar and colonized microbial communities of bacteria and archaea. The abundance of Actinotalea increased by 144-263% in SB and CB while that of Desulfatitalea distinctly increased in WB. Meanwhile, species from Methanosarcina, Methanoculleus, Halovivax and Natronorubrum exerted probably a methanogenic degrading role. This study revealed that the degrader, azotobacter and electricigens exhibited a close relationship in order to degrade hydrocarbons and generate electricity in soil bioelectrochemical remediation systems.

KEYWORDS:

Biochar of amendment; Biological interaction; Electricity generation; Microbial community; Petroleum hydrocarbon degradation; Soil bioelectrochemical remediation

PMID:
30253361
DOI:
10.1016/j.scitotenv.2018.09.098
[Indexed for MEDLINE]

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