• 研究论文 •

### 阿哈湖和红枫湖沉积物铁锰循环及重金属垂向分布特征

1. (1北京师范大学水科学研究院， 北京 100875；2地下水污染控制与修复教育部工程研究中心， 北京 100875)
• 出版日期:2018-03-10 发布日期:2018-03-10

### Iron and manganese cycling and vertical distribution of heavy metals in sediments of Aha Lake and Hongfeng Lake.

KANG Ting1,2, SONG Liu-ting1,2*, ZHENG Xiao-di1,2, HUANG Ying1,2, YANG Jie1,2, TENG Yan-guo1,2

1. (1College of Water Sciences, Beijing Normal University, Beijing 100875, China; 2Engineering Research Center of Groundwater Pollution Control andRemediation, Ministry of Education, Beijing 100875, China).
• Online:2018-03-10 Published:2018-03-10

Abstract: Aha Lake and Hongfeng Lake are two adjacent lakes on the Yunnan-Guizhou Plateau, the sedimentary environments of which are different. The sedimentary environment of Aha Lake is weakly oxidizing to reducing whereas that of Hongfeng Lake is oxidizing. To compare the enrichment, migration, and transformation characteristics of heavy metals in lakes with different sedimentary environments, contents and vertical distributions of heavy metals in sediments as well as pore waters were investigated in Aha Lake and Hongfeng Lake. The results showed that contents of Co, Ni and Zn were relatively high with moderate to heavy pollution levels in the sediments of Aha Lake. For Hongfeng Lake, while the contents of As and Zn were relatively high,  other heavy metals were unpolluted or slightly polluted. The characteristics of the cycling of Fe and Mn in two lakes were significantly different. In contrast to that in Hongfeng Lake, Fe and Mn cycling was extremely intense and the reduction zoning was more distinct in the sediments of Aha Lake, due to higher Fe, Mn, and S contents and Mn/Fe ratio. Based on those findings, we constructed a conceptual model of early diagenesis of Fe and Mn cycling process in the sediments of Aha Lake and Hongfeng Lake. Following terrigenous correction and correlation analysis, results showed that the cycling of Fe and Mn played an important role on the distributions, migrations and transformations of heavy metals. The migrations and transformations of Co, Ni, Zn and As were mainly influenced by Mn cycling, while that of Cu was mainly influenced by Fe cycling in Aha Lake. In contrast, the migrations and transformations of Co, Ni, Cu, Zn, Cr, As and Pb were influenced by Fe cycling in Hongfeng Lake.