The Horizontal Variation Process and Rule of Bottom Waters Impacted by Cd Contents from Sources

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Yang, Dongfang^1^2^3 ; Su, Chunhua^1^2 ; Wu, Yunjie^1^2 ; Fan, Bailing^1^2 ; Zhu, Sixi^1^2

Research Center for Karst Wetland Ecology, Guizhou Minzu University Guizhou Guiyang, Guizhou Guiyang, China^1

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

550025, China^2

North China Sea Environmental Monitoring Center, SOA, Qingdao

266033, China^3

关键词: Bottom water;    Horizontal distribution;    Horizontal variation;    Jiaozhou Bay;    Seawater quality;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/4/042056/pdf
DOI  :  10.1088/1755-1315/310/4/042056

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

According to the investigation data of Jiaozhou Bay in 1991, the current content and horizontal distribution of Cd contents in bottom waters from central to southern Jiaozhou Bay were studied in this paper. The results showed that in May, Cd content in this area was 0.06-0.10μg/L, and Jiaozhou Bay was not polluted by Cd content. In August, the range was 0.06-0.38μg/L, and Jiaozhou Bay was not polluted by Cd content. In October, the range was 0.26μg/L, and there was no pollution of Cd content in Jiaozhou Bay. Hence, in May, August and October, Cd contents in this area were low, far lower than 1.00μg/L, the Case I Sea Water Quality Standard. In terms of Cd content, water is clean, not polluted by Cd content. In May, in surface waters of bay center, there is not source to transport Cd content. In bottom waters from bay center to northern bay mouth, Cd content decreased from 0.08μg/L in bay center to 0.06μg/L in northern bay mouth along with the gradients. In August, Cd was high as0.40μg/L in surface waters of bay center, mainly from atmospheric sedimentation, which is relatively high. In bottom waters from bay center to northern bay mouth, Cd content decreased from 0.38μg/L in bay center to 0.16μg/L in northern bay mouth along with the gradients. In this paper, the impact of Cd contents from sources on bottom waters was studied. Besides, the horizontal variation of Cd contents disclose the variation of bottom waters influenced by Cd contents from sources.