title: [Soil contamination and assessment of heavy metals of Xiangjiang River Basin].
abstract: The contents of heavy metals (As, Cd, Cu, Zn, Ni and Pb) in soils from Xiangjiang River Basin, Hunan Province, China, were analyzed by toxicity characteristic leaching procedure (TCLP) and Nemrow method. Results showed that the total contents of As, Cd, Cu, Zn, Ni and Pb were 4.25-549.67, 0.13-76.84, 11.49-281.69, 7.75-7234.81, 5.50-56.65 and 8.60-2084.81 mg x kg(-1), respectively, and the available contents of As, Cd, Cu, Zn, Ni and Pb extracted by TCLP were 0.02-10.97, 0.06-28.41, 0.04-72.29, 0.59-1 152.32, 0.07-10. 65 and 0.17-1 165.58 mg x kg(-1). The contents of available heavy metals extracted by TCLP correlated with total contents of heavy metals. Moreover, the pollution index Nemrow method showed that 72 samples at safety level, alert level, light pollution level, medium pollution level and heavy pollution level ratios were 60.52%, 11.33%, 5.65%, 4.22% and 18.38% separately, illustrating that pollution of heavy metals in soil samples of Xiangjiang River Basin is serious.
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. liuchunzao@163.com
authors.forename: Chun-Zao
authors.initials: CZ
authors.lastname: Liu
authors.forename: Yi-Zong
authors.initials: YZ
authors.lastname: Huang
authors.forename: Ming
authors.initials: M
authors.lastname: Lei
authors.forename: Xiao-Wei
authors.initials: XW
authors.lastname: Hao
authors.forename: Xi
authors.initials: X
authors.lastname: Li
authors.forename: Bo-Qing
authors.initials: BQ
authors.lastname: Tie
authors.forename: Jian-Zhi
authors.initials: JZ
authors.lastname: Xie
mesh_terms: D002104:Cadmium / Q000032:analysis; D002681:China; D003300:Copper / Q000032:analysis; D004784:Environmental Monitoring; D007854:Lead / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D018570:Risk Assessment; D045483:Rivers; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; D007854:Lead; D003300:Copper