Carbonization of Plant Residues Decreased their Capability of Reducing Hexavalent Chromium in Soils

doi:10.1007/s11270-019-4353-0

	Carbonization of Plant Residues Decreased their Capability of Reducing Hexavalent Chromium in Soils
	Li, Bo 1; Yang, Junxing 3; Sun, Wentao 1; Ma, Yibing 2
刊名	WATER AIR AND SOIL POLLUTION
	2019-12-01
卷号	230 期号:12 页码:13
关键词	Chromium Soils Maize stalk Biochar Reduction Bioavailability
ISSN号	0049-6979
DOI	10.1007/s11270-019-4353-0
通讯作者	Ma, Yibing(mayibing@caas.cn)
英文摘要	The mechanism of Cr(VI) immobilization in soils by organic substances are not well understood. In the present study, two crop residues (maize stalk and peanut shell) and their biochars obtained at various pyrolysis temperatures were prepared to investigate their influences on the immobilization of Cr(VI) in two contaminated soils via an incubation test and a bioassay. The results showed that Cr(VI) immobilization in soils was ascribed to dominant reduction (52-99%) coupled with secondary surface adsorption (1.2-48%) by organic substances. The maximum reduction capacity (Y-m, 238 mg/kg) was found in an acidic brown soil with maize stalk amendment, secondly, with peanut shell amendment (Y-m, 231 mg/kg). Their biochars presented a weaker capacity in reducing Cr(VI) to Cr(III) of soils than raw crop residues since carbonization accelerated the decomposition of oxygen-containing functional groups of organic substances. Soil properties, mainly soil pH, were negatively related to Cr(VI) reduction in soils remarkably, while concomitant anions in soils mainly the phosphate could compete with Cr(VI) for surfaces of soil particles and decrease Cr(VI) adsorption and subsequent reduction. The bioassay in pots with wheat seedlings further validated that maize stalk was a better organic substance for Cr(VI) immobilization and subsequent decrease of its bioavailability in contaminated soils than its biochar according to the results of wheat biomass and Cr contents in shoots and roots. Accordingly, to develop a cost-effective method for immobilizing Cr(VI) in contaminated soils, the raw maize stalk is more advantageous than the carbonaceous counterparts because no pyrolysis is required for the application.
资助项目	National Natural Science Foundation of China[41401361] ; GDAS (Guangdong Academy of Sciences) Project of Science and Technology Development, China[2016GDASRC-0210] ; National Science and Technology Infrastructure Program of theMinistry of Science and Technology of China[2015BAD05B03]
WOS关键词	ZERO-VALENT IRON ; ORGANIC AMENDMENTS ; MODIFIED BIOCHAR ; COCONUT COIR ; WASTE-WATER ; REMOVAL ; CR(VI) ; REDUCTION ; ADSORPTION ; PYROLYSIS
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources
语种	英语
出版者	SPRINGER INTERNATIONAL PUBLISHING AG
WOS记录号	WOS:000507876200003
资助机构	National Natural Science Foundation of China ; GDAS (Guangdong Academy of Sciences) Project of Science and Technology Development, China ; National Science and Technology Infrastructure Program of theMinistry of Science and Technology of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/131442]
专题	中国科学院地理科学与资源研究所
通讯作者	Ma, Yibing
作者单位	1.Liaoning Acad Agr Sci, Inst Plant Nutr & Environm Resources, Shenyang 110161, Liaoning, Peoples R China 2.Guangdong Inst Ecoenvironm Sci & Technol, Guangdong Key Lab Integrated Agroenvironm Pollut, Guangzhou 510650, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Environm Remediat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, Bo,Yang, Junxing,Sun, Wentao,et al. Carbonization of Plant Residues Decreased their Capability of Reducing Hexavalent Chromium in Soils[J]. WATER AIR AND SOIL POLLUTION,2019,230(12):13.
APA	Li, Bo,Yang, Junxing,Sun, Wentao,&Ma, Yibing.(2019).Carbonization of Plant Residues Decreased their Capability of Reducing Hexavalent Chromium in Soils.WATER AIR AND SOIL POLLUTION,230(12),13.
MLA	Li, Bo,et al."Carbonization of Plant Residues Decreased their Capability of Reducing Hexavalent Chromium in Soils".WATER AIR AND SOIL POLLUTION 230.12(2019):13.