Author/Authors :
Lu، نويسنده , , Xueqiang and Zhang، نويسنده , , Yan and Liu، نويسنده , , Honglei and Xing، نويسنده , , Meinan and Shao، نويسنده , , Xiaolong and Zhao، نويسنده , , Feng and Li، نويسنده , , Xiaojuan and Liu، نويسنده , , Qiongqiong and Yu، نويسنده , , Dan-Dan and Yuan، نويسنده , , Xuezhu and Yuan، نويسنده , , Min، نويسنده ,
Abstract :
The influence of early diagenesis on the vertical distribution of metal forms in the sediments of Bohai Bay was discussed in this paper. The results showed that the concentrations were: Al > Fe ≈ Ca > Mn > Cr > Zn > Cu > Pb > Cd. In vertical distribution, the forms of Cr and Pb were stable from the top to the bottom. However, the exchangeable forms and acid-extracted forms of Cd, Cu and Zn presented an obvious declining trend. The metals would be transformed to more stable forms during the early-diagenesis process. Further analysis found that early diagenesis can change the sedimentary environment, affecting pH, oxidation–reduction potential (ORP), total dissolved solid (TDS) and the structure of organic matter (OM), all main factors influencing metal forms in the sediments of Bohai Bay.
Keywords :
Bohai Bay , early diagenesis , Different forms , vertical distribution , Metal pollution
