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- Title
Mechanism of Biochar Promoting Pentachlorophenol Biodegradation at Different Temperatures.
- Authors
HUANG Fengcheng; WU Weijian; ZHANG Weijian; CHEN Yijie; LI Gaoyang; LI Huijun; WEI Ting; LIN Zhong; ZHEN Zhen
- Abstract
In order to explore the removal effect of biochar on pentachlorophenol in soil, to seek the optimal pyrolysis temperature of biochar to promote the biodegradation efficiency of PCP, five treatments were set up: CK, BC350, BC450, BC550, and BC650. By SEM to observe the characterization structure of biochar, samples were taken at 0 d, 10 d, 20 d, 30 d and 40 d, soil physical and chemical properties, enzyme activities and microbial community structure were measured. The results showed that the abundance of PCP degrading bacteria such as Sphingomonadaceae, Rhizobiaceae, Bacillaceae and Beijerinckiaceae increased significantly when biochar was applied. The degradation rate of PCP in BC650 was 80.97%, which was significantly higher than that in CK (17.37%). In contrast, the pH value of soil under BC650 treatment increased 39.60%, organic matter increased 36.72% and humus increased 128.87% compared with CK treatment. Alkaline phosphatase, dehydrogenase and sucrase respectively were 14.07 mg/(g · d), 1.22 µg/(g · d) and 1.23 mg / g, which were significantly higher than those in CK (7.17 mg/(g·d), 0.38 µg/(g·d), 0.28 mg/g). Adding biochar to PCP contaminated soil can improve soil physical and chemical properties, improve soil enzyme activity, indirectly optimize microbial community structure, and accelerate the biodegradation process of PCP.
- Subjects
BIOCHAR; HUMUS; BIODEGRADATION; PENTACHLOROPHENOL; ALKALINE phosphatase; SOIL enzymology
- Publication
Environmental Science & Technology (10036504), 2022, Vol 45, Issue 9, p32
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.0575.22.338