The Lead Distribution Characteristics and Bioavailability in Surface Sediments of the Collapse Lake

摘要

In order to analyze the distribution characteristics of lead,the paper takes surface sediments in collapse lake in Yangzhuang coal mine Huai Bei as the research object.Data are statistical analyzed by SPSS17.0.The results showed that the total lead concentration in surface sediments distribute spatial variation.The total lead concentration in northwest collapse lake is higher than that of central and eastern collapse lake,having the significant difference (P＜0.05).Possible lead sources were mine waste water discharge,coal gangue pile of long-term leaching.The BCR sequential extraction showed that residual fractions＞oxidizable fractions＞reductive fractions＞acetic acid fractions.Pb was dominated mainly by the fraction of residual Pb,and lower acetic acid fractions.The results indicated that lead bioavailability was low.