华南四座固体废物综合处理产业园周边土壤重金属研究

采集了华南四座固体废物综合处理产业园周边表层土壤样品,并分析各样品中Cd、Pb、Hg、As、Cr、Cu、Ni、Zn和Co等9种重金属以及氟化物的含量,研究了重金属和氟化物的含量水平、空间分布及来源构成.结果表明,研究范围内表层土壤重金属和氟化物含量均值范围分别为Cd(0.165～1.161mg/kg)、Pb(37.8～...

Heavy metals in soils surrounding four municipal solid waste comprehensive treatment parks in South China

The contents, spatial distribution and source composition of nine selected heavy metals (Cd, Pb, Hg, As, Cr, Cu, Ni, Zn, Co) and fluorine were determined and analyzed in the top soils surrounding four municipal solid waste comprehensive treatment parks (MSWCTP) in South China. The mean contents of contaminants in the top soils surrounding the four MSWCTPs were 0.165~1.161mg/kg for Cd, 37.8~60.7mg/kg for Pb, 0.041~0.103mg/kg for Hg, 3.6~26.2mg/kg for As, 26.4~67.7mg/kg for Cr, 19.1~54.6mg/kg for Cu, 10.4~26.8mg/kg for Ni, 70.8~109.1mg/kg for Zn, 5.51~18.69mg/kg for Co, and 349.1~618.1mg/kg for F. The mean contents of Cd in the top soils surrounding four MSWCTPs and As in the top soils surrounding RFH were 1.9~19.7 and 1.9 times higher than their respective background values. While the mean contents of other contaminants showed no significant differences by comparing with the corresponding background values. Using principle component analysis, two groups of heavy metals with different spatial distribution were identified:Cr, Ni, Cu, Co, and Zn originated from lithological sources, whereas Hg, Cd, Pb, As, and F were affected by both lithological and human sources. Based on the emission data and background values of soil, the fingerprint spectra of pollution sources for MSWCTP were established, in which Hg, Cd, Pb, As, F were chosen as potential indicators.