[Multivariate geostatistics and GIS-based approach to study the spatial distribution and sources of heavy metals in agricultural soil in the Pearl River Delta, China].
One hundred and eighteen surface soil samples were collected from the Dongguan City, and analyzed for concentration of Cu, Zn, Ni, Cr, Pb, Cd, As, Hg, pH and OM. The spatial distribution and sources of soil heavy metals were studied using multivariate geostatistical methods and GIS technique. The results indicated concentrations of Cu, Zn, Ni, Pb, Cd and Hg were beyond the soil background content in Guangdong province, and especially concentrations of Pb, Cd and Hg were greatly beyond the content. The results of factor analysis group Cu, Zn, Ni, Cr and As in Factor 1, Pb and Hg in Factor 2 and Cd in Factor 3. The spatial maps based on geostatistical analysis show definite association of Factor 1 with the soil parent material, Factor 2 was mainly affected by industries. The spatial distribution of Factor 3 was attributed to anthropogenic influence.
Cai
Li-mei
LM
Department of Earth Science, Sun Yat-sen University, Guangzhou 510275, China. cailimei@mail2.sysu.edu.cn
Ma
Jin
J
Zhou
Yong-zhang
YZ
Huang
Lan-chun
LC
Dou
Lei
L
Zhang
Cheng-bo
CB
Fu
Shan-ming
SM
D002681:China; D018556:Crops, Agricultural / Q000254:growth & development*; D004784:Environmental Monitoring; D040362:Geographic Information Systems; D055593:Geological Phenomena; D019216:Metals, Heavy / Q000032:analysis*; D015999:Multivariate Analysis; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*
D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants