Abstract
Many marine bays bave been polluted by Plumbum (Pb) due to the rapid development of industry and the swift increasing of economic, and therefore understanding the source and fate of Pb is essential to environmental remediation in marine bays. This paper analyzed the source and fate of Pb in Jiaozhou Bay, Shandong Province, eastern China in 1989. Results showed that Pb contents in surface waters in April, July and October 1989 were 5.56-12.59 μg L-1, 1.73-15.17 μg L-1 and 0.50-11.57 μg L-1, and the pollution levels were heavy, moderate and slight/moderate, respectively. The major sources of Pb in this bay were atmosphere deposition, overland runoff and river discharge, and their source strengths were 15.17 μg L-1, 12.59 μg L-1 and 11.57-12.06 μg L-1, respectively. The three source input processes were defined that the longer migration processes, the larger loss of substance’s contents. Furthermore, fate of Pb from source to sink was also defined. These migration processes were demonstrated by two block diagrams, which were helpful to better understand the source and fate of Pb in marine bay.
Highlights
Plumbum (Pb) is one of the widely used heavy metal elements in industry, agriculture and so on
In April 1989, high value of Pb contents was in Site 84 in the southwest coast (12.59 μg L-1), and the contour lines were forming a series of parallel lines that decreasing from the southwest to the bay center (9.96 μg L-1), the north coast (6.80 μg L-1) and northeast coast (5.56 μg L-1), respectively (Fig. 2)
In July 1989, high value of Pb contents was in Site 85 in the bay center (15.17 μg L-1), and the contour lines were forming a series of semi-circles that decreasing from the bay center to the the north (3.12 μg L-1), east (9.07 μg L-1) and southwest of the bay (1.73 μg L-1), respectively (Fig. 3).another high value was in Site 04 in the northeast of the bay (12.06 μg L-1), and the contour lines were forming a series of semi-circles that decreasing from the northeast of the bay to the north of the bay (3.12 μg L-1) and to the northeast of the bay (2.95 μg L-1), respectively (Fig. 3)
Summary
Plumbum (Pb) is one of the widely used heavy metal elements in industry, agriculture and so on. Understanding the pollution level, distribution, source and fate of Pb in marine bay is essential to marine environmental protection. Jiaozhou Bay is a semi-closed bay located in south of Shandong Peninsula, eastern China. This bay has been polluted by various pollutants including Pb due to the rapid development of industry in since China’s Reform and Opening-up [4,5,6]. This paper analyzed the source and fate of Pb in Jiaozhou Bay, Shandong Province, eastern China in 1989. Fate of Pb from source to sink was defined. These findings were helpful to better understand the source and fate of Pb in marine bay
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