文档介绍：Comparison of heavy metal distribution and
bioavailability in surficial sediments collected in the
Songhua River, northeast of China
Lei Gao, Wenjin Zhao* Na Li
College of Environment and Resources Ministry of Agriculture National Center for the Supervision
Jilin University and Test of Pesticides
Changchun 130012, China Shenyang Research Institute of Chemical Industry
******@jlu. Shenyang 110021, China
Abstract—Five elements (iron, manganese, copper, zinc and lead) oxides, iron oxides anic materials among the main
in three surficial sediments (SSs) and three natural ponents in the SSs and NSCSs have been recognized as the
coating samples (NSCSs) from the Songhua River, northeast of three most important geochemical factors affecting adsorption
China were analyzed with the modified sequential extraction of trace metals on the solid phases [6-10]. Hence, studies were
procedure (MSEP) pare the metal distribution and principally focused on the adsorption mechanism of trace
bioavailability in the two solid phases. The results indicated that metals, and there was a divergence of points of view between
Cu was present mainly in the bound anic matter fraction; the relative importance of Fe/Mn oxides anic matters in
Zn and Pb appeared in the bound to Fe oxides dominantly. The the SSs and NSCSs in controlling heavy metal activities. Some
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