Settlement processes and features of Cd in Jiaozhou Bay

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Yang, Dongfang^1,2,3 ; Zhu, Sixi^1,2 ; Su, Chunhua^1,2 ; Wu, Yunjie^1,2 ; Wang, Xiaodan^1,2

Research Center for Karst Wetland Ecology, Guizhou Minzu University, Guiyang

550025, China^1

College of Chemistry and Environmental Science, Guizhou Minzu University, Guiyang

550025, China^2

North China Sea Environmental Monitoring Center, SOA, Qingdao

266033, China^3

关键词: Accumulation effects;    Bottom water;    Cadmiums (Cd);    Horizontal distribution;    Jiaozhou Bay;    Pollution level;    River runoffs;    Source strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/2/022018/pdf
DOI  :  10.1088/1755-1315/199/2/022018

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Using investigation on Cadmium (Cd) in bottom waters in this bay during 1984-1988, this paper analyzed the pollution level, horizontal distribution and settlement process of Cd. Results showed that Cd contents in all of the sampling days except July 1986 were lower than 1.0 μg L-1 and were conform wo Grade I, while Cd contents in July 1986 were higher than 1.0 μg L-1 and were conform wo Grade II. The pollution levels of the Cd in bottom waters in Jiaozhou Bay during 1984-1988 were still very slight. The settlement processes were determined by source input, vertical water's effect and horizontal water's effect, and the high sediment processes were resulting in accumulation effects in bottom waters. Cd sourced from river runoff was able to arrive the bottom waters in the inner side of the bay mouth, the bay mouth and the outer side of the bay mouth. Cd sources from marine current could impact bottom waters in the inner and outer side of the bay mouth. In case of the source strength of marine current was relative high, there was high settlement process in the outer side of the bay mouth. In case of the source strength of river runoff was relative high, there was high settlement process in the inner side of the bay mouth.