Physical chemical properties and BCR speciation analysis of cr-contaminated soil in plateau

3rd International Conference on New Material and Chemical Industry

材料科学;化学工业

Ma, J.^1 ; Xiong, H.B.^2 ; Gao, J.T.^3 ; Gao, Y.T.^2

West Yunnan University of Applied Technology, Ministry of Public Basic Course, Dali, 671000, China^1

Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission and Ministry of Education, Yunnan University of Nationalities, Kunming

650500, China^2

Yunnan Institute of TCM, Kunming

650500, China^3

关键词: Cation exchange capacities;    Contaminated soils;    Extraction method;    Leaching toxicity;    Organic matter content;    Physical and chemical properties;    Physical chemical property;    Speciation analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/479/1/012056/pdf
DOI  :  10.1088/1757-899X/479/1/012056

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

To explore physical and chemical properties and abundant form of Cr pollution red soil in plateau, study the transition and transform rule of Cr in red soil. In this paper, Cr pollution red soil in plateau as the research object, use the leaching toxicity experiment and BCR(Bureau Community of Reference) three steps extraction method, to study the change of valence state and occurrence form of heavy metal. The result shows that the acid red soil pH value is 6.13, organic matter content is 18.8 g/kg, silt and clay proportion is nearly 50%, 60%, high cation exchange capacity. The carbonate bound state accounted for 30.24% of total species, The Fe-Mn oxidation state accounted for 19.31, the organic matter and sulfide bound state accounted for 29.51%, and the residue state accounted for 20.94%. The result shows that the physical and chemical properties of the red soil in plateau have certain effects on the accumulation migration and transformation of heavy metals.