MA Li1,2,3, GUI Herong2
（1. School of Material and Chemical Engineering, Bengbu University,Bengbu 233030, China;
2. Anhui Engineering Research Center of Coal Mining exploration, Suzhou University,Suzhou 234000, China;
3. School of Earth and Space Science, University of Science and Technology of China, Hefei 230026 ,China）
Abstract: The subsidence lake in Zhuxianzhuang coal mine was selected as a target area to study the distribution of heavy metal concentrations (Pb, V, Cr, Cu, Co and Ni) based on the field investigation, sampling, indoor test and analysis. Results indicate that the heavy metal concentrations in water are in the order of V＞Cu＞Ni＞Pb＞Cr＞Co, whereas the variations coefficients of heavy metals followed the order of Pb＞Co＞Cr＞Cu＞Ni＞V. Two of them (Pb and Co) have high coefficients of variations (99.7% and 93.6%, respectively), suggesting that the spatial variations of them are significant. The box diagrams imply that all of the heavy metals concentrations exceed background values with different extents; water samples from the pool II have the highest concentrations of heavy metals, indicating the significant contribution from the human activities, whereas the samples from the pool IV have the lowest metal concentrations. Cluster and principal component analyses suggest that the sources of these heavy metals are different; Pb and Cu mainly originate from coal gauge dump; V and Co are mainly from coal firing, Cr is mainly controlled by geological weathering, while Ni is of multiple sources.
Key words: Zhuxianzhuang coal mine; subsidence lake; heavy metal; source identification
EARTH AND ENVIRONMENT Vol.45, No.3, Tot No.317, 2017, Page 277-282
