Abstract
Heavy metals are important marine environmental factors for the safety and regional sustainable development. In this paper, the Caofeidian marine district in Tangshan Bay is considered as the case for the environmental research. The distribution and trend of heavy metal Pb in marine waters and sediment is analyzed by the natural neighbor grid method and the least squares fitting method. The enriched characteristic of Pb in different marine medium is studied by the trend of Pb in waters and the sediment. The research results show that the part of Pb exists exceeded forth level of water quality in 2007 and the trend of Pb in sediment is on the rise, oppositely in waters. The enriched characteristic analysis points out the object of environmental management.
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