CHENG Jun1,2, CHENG Li-jun1
(1. Chongqing Key Laboratory of Exogenic Mineralization and Mine Environment, Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China;
2. Chongqing Research Center of State Key Laboratory of Coal Resources and Safe Mining, Chongqing 400042, China)
Abstract: The Lower Cambrian black rock series is well developed in the Chengkou district, Chongqing. The concentrations of Cr, Co, Ni, Cu, Zn, As, Cd, Sb and Pb in polymetallic layer, black rock series and responding weathering soil, and silicates were measured. The results showed that in the polymetallic layer, the heavy metals are enriched, especially Cd, Zn and As, and the enrichment coefficients are 119.67, 10.73 and 7.30, respectively. The geo-accumulation index and ecological risk index methods have been used to assess the potential environmental effects. The ecological risk of Cd, As in the polymetallic layer is serious, and attention should be paid to this in future study.
Key words: Chengkou district; black rock series; heavy metal; environmental effect; cadmium
EARTH AND ENVIRONMENT Vol. 40, No.1, Tot No.287, 2012, Page 93-99
