Negative role of biochars in the dissipation and vegetable uptake of polycyclic aromatic hydrocarbons (PAHs) in an agricultural soil: Cautions for application of biochars to remediate PAHs-contaminated soil

doi:10.1016/j.ecoenv.2021.112075

	Negative role of biochars in the dissipation and vegetable uptake of polycyclic aromatic hydrocarbons (PAHs) in an agricultural soil: Cautions for application of biochars to remediate PAHs-contaminated soil
	Zhang, Fengsong 1,2; Zhang, Guixiang 3; Liao, Xiaoyong 1
刊名	ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
	2021-04-15
卷号	213 页码:9
关键词	Agricultural soil Bioaccumulation Biochar Health risk Polycyclic aromatic hydrocarbons
ISSN号	0147-6513
DOI	10.1016/j.ecoenv.2021.112075
通讯作者	Zhang, Fengsong(zhangfs@igsnrr.ac.cn) ; Liao, Xiaoyong(liaoxy@igsnrr.ac.cn)
英文摘要	Biochars were studied for their impacts on the dissipation and vegetable uptake of polycyclic aromatic hydrocarbons (PAHs) in an agricultural soil. The health risks of PAHs taken up by vegetables were assessed by growing Chinese cabbage in both unamended soil and biochar-amended soils. In the unamended soil, the total 16 PAHs (Sigma 16PAHs) content decreased by 77.38% after planting the vegetable. The dissipation percentages of low-molecular-weight PAHs (LMW-PAHs), medium-molecular-weight PAHs (MMW-PAHs), and high-molecular-weight PAHs (HMW-PAHs) were 82.37%, 72.65%, and 68.63%, respectively. A significant negative correlation was determined between the dissipation percentages of PAHs in soil and the logK(ow) of PAHs (p < 0.01), indicating that the affinity of PAHs for soil particles was one of an important limiting factors on the dissipation of PAHs. The uptake of PAHs by plant was significantly reduced with the increase in the molecular weight of the PAHs (76.55% for LWM-PAHs, 17.13% for MMW-PAHs, and 6.05% for HMW-PAHs). Addition of biochars to the soil decreased the dissipation of Sigma 16PAHs (73.59-77.01%), mostly due to a decrease in the dissipation of LMW-PAHs and MMW-PAHs. This finding was due to the immobilization of LMW-PAHs and MMW-PAHs within the biochar micropores. A marked reduction of Proteobacteria in biochar-amended soils also resulted in the decreased biodegradation of PAHs. Four of six biochars significantly increased the concentrations of Sigma 16PAHs in plant by 30.10-74.22%. Generally, biochars significantly increased the uptake of LMW-PAHs by plant but had little influence on the plant uptake of MMW-PAHs and HMW-PAHs. Three of six biochars notably increased the incremental lifetime cancer risk values based on the exposure of PAHs by vegetable consumption.
资助项目	National Key Research and Development Program of China, China[2018YFC1802803] ; Second Tibetan Plateau Scientific Expedition and Research Program, China[2019QZKK1003] ; Strategic Priority Research Program of the Chinese Academy of Sciences, China[XDA23010400] ; Foundation of President of the Zhongke-Ji'an Institute for Eco-Environmental Sciences, China[2020ZKJA03] ; Key science and technolgy program of Ji'an City, China[2019J55]
WOS研究方向	Environmental Sciences & Ecology ; Toxicology
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000632393800007
资助机构	National Key Research and Development Program of China, China ; Second Tibetan Plateau Scientific Expedition and Research Program, China ; Strategic Priority Research Program of the Chinese Academy of Sciences, China ; Foundation of President of the Zhongke-Ji'an Institute for Eco-Environmental Sciences, China ; Key science and technolgy program of Ji'an City, China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162054]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang, Fengsong; Liao, Xiaoyong
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Zhongke Jian Inst Ecoenvironm Sci, Inst Geog Sci & Nat Resources Res, Jian 343000, Peoples R China 3.Taiyuan Univ Sci & Technol, Coll Environm & Safety, Taiyuan 030024, Shanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Fengsong,Zhang, Guixiang,Liao, Xiaoyong. Negative role of biochars in the dissipation and vegetable uptake of polycyclic aromatic hydrocarbons (PAHs) in an agricultural soil: Cautions for application of biochars to remediate PAHs-contaminated soil[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2021,213:9.
APA	Zhang, Fengsong,Zhang, Guixiang,&Liao, Xiaoyong.(2021).Negative role of biochars in the dissipation and vegetable uptake of polycyclic aromatic hydrocarbons (PAHs) in an agricultural soil: Cautions for application of biochars to remediate PAHs-contaminated soil.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,213,9.
MLA	Zhang, Fengsong,et al."Negative role of biochars in the dissipation and vegetable uptake of polycyclic aromatic hydrocarbons (PAHs) in an agricultural soil: Cautions for application of biochars to remediate PAHs-contaminated soil".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 213(2021):9.