Sedimentation process of Cr and the mechanism in the bay mouth of Jiaozhou Bay 1983

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Yang, Dongfang^1^2^3 ; Wang, Fengyou^1^2 ; Zhu, Sixi^1^2 ; Huang, Chengling^1^2 ; Fan, Bailing^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: Jiaozhou Bay;    Open water;    Sedimentation process;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/2/012024/pdf
DOI  :  10.1088/1755-1315/295/2/012024

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The investigation data on Chromium (Cr) in waters around the bay mouth in Jiaozhou Bay in May, September and October 1983 showed the sedimentation process of Cr, and tried to reveal the mechanism. Results showed that the change ranges of absolute horizontal loss and relative horizontal loss were 0.04-0.89 μg L-1 and 3.44-80.00%, respectively. The absolute vertical accumulation amount and relative vertical accumulation amount were 0.14-0.86 μg L-1 and 8.86-86.86%, while the absolute vertical dilution amount and relative vertical dilution amount were 0.01-0.62 μg L-1 and 0.85-37.50%, respectively. The absolute vertical dilution amounts in waters in the bay mouth were very high (86.86%) and relative high (37.50%) in May and September, respectively. The bay mouth was playing a role of parclose in which a big part of Cr was filtering continuously. The mechanism of the sedimentation process was that, the horizontal loss of substance content was very high when the marine current was moving across the bay mouth, and there was high sedimentation process in the bay mouth. In spite of the flow rate of marine current was increasing in the bay mouth, Cr in the open waters was difficult to be transported to the bay, and Cr in the bay was also difficult to be transported to the open waters.