Seasonal-temporal variations of Cd contents on in Jiaozhou Bay 1984-1988

[摘要] This paper analyzed the seasonal and spatial variations of Cadmium (Cd) in Jiaozhou Bay during 1984-1988. Results showed that Cd contents in Jiaozhou Bay in 1984, 1985, 1986, 1987 and 1988 were 0.06-0.20 g L-1, 0.03-0.44 g L-1, 0.01-6.48 g L-1, 0.07-0.12 g L-1, and 0.03-1.07 g L-1, respectively. The pollution levels of Cd in Jiaozhou Bay in 1984, 1985, 1986, 1987 and 1988 were Grade I, I, I-III and V, I, and I-II, respectively. The seasonal variation of Cd contents was summer > spring > autumn. The pollution level of Cd during 1984-1985 was still slight, while the pullution level during 1986-1988 was tending to be aggravating to be slight/moderate. In general, the source input of Cd to this bay was increasing during the five-year period, and the pollution level of Cd would be aggravating since the water environmental capacity was not infinite. As a whole, source control was one of the basic contourmeasures for pollution control and environmental remediation in this bay.

[发布机构] Accountancy School, Xijing University, Xian; 710123, China^1;North China Sea Environmental Monitoring Center, SOA, Qingdao; 266033, China^2

[效力级别] 无线电电子学

[关键词] Cadmiums (Cd);Environmental remediation;Pollution level;Seasonal variation;Source control;Spatial variations;Temporal variation;Water environmental capacities