Enrichment of heavy metal elements and their adsorption on iron oxides during carbonate rock weathering process

作     者：Shanqin Ni a, Yiwen Jua, Quanlin Hou a,*, Shijie Wang b, Qing Liua, Yudong Wua, Lingling Xiao a a College of Earth Science, Graduate University of Chinese Academy of Sciences, Beijing 100049, China b State Key Laboratory of Environment Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 

作者机构：College of Earth Science Graduate University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Environment Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2009年第19卷第9期

页      面：1133-1139页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Basic Research Program of China (Grant No. 2006CB202201) the Beijing Municipal Natural Science Foundation(Grant No. 8063032) 

主　　题：Carbonate rock Heavy metal elements Adsorbent Enrichment 

摘      要：Analysis of trace elements in the Lower Palaeozoic carbonate rock strata of the Beijing area shows that the Cr, Zn, Cd and Pb contents increase from primary carbonate rocks to weathered carbonate rocks and from primary carbonate rocks to the soil coexisting with carbonate rock. Distributions of Cr, Zn, Cd and Pb have the same trends as that of Fe2O3. Iron oxides play different roles at different stages of weathering of carbonate rock. The adsorption of Cr, Zn, Cd and Pb on Fe2O3 is greater than on FeO in soil. However, FeO, as a main component of clay mineral, is a better adsorbent of Cr, Zn, Cd and Pb than Fe2O3 in weathered and primary carbonate rocks. According to R-type clustering analysis, the main components of carbonate rock are divided into marine and continental sediments. Correlation analysis shows that heavy metal elements mainly exist in continental substances.