Distribution of biogenic elements and potential contamination assessment in surface sediments from western Guangdong coasts

作者：Gu Yang Guang; Wang Zhao Hui^*; Lu Song Hui; Yang Yu Feng; Feng Jie; Fang Jun; Shu Yong Hong; Mu De Hai

来源：Journal of Shenzhen University Science and Engineering, 2010, 27(3): 347-353.

• Biogenic silica
• Total nitrogen
• Total Organic Carbon
• Total phosphoru
• Western Guangdong coast

The concentrations of four types of biogenic elements, biogenic silica (BSi), total organic carbon (TOC), total nitrogen (TN) and total phosphorus (TP), were determined in surface sediments collected from western Guangdong coasts between July 2006 and November 2007. Results showed that concentrations of biogenic elements from Guangdong Western Coasts were within moderate levels compared with those from other coastal areas in the world. BSi, TOC, TN, and TP contents were in average levels of 0.27%, 0.90%, 0.27% and 0.027% in summer, and were 0.24%, 0.67%, 0.06% and 0.022% in winter respectively. From the TOC/TN ratios, it is suggested marine origin of TOC in Hailing Bay, Shuidong Harbor and Leizhou Bay, and terrestrial origin of TOC in Liusha Bay. BSi contents were high in three seasons except for the winter, displaying the higher diatom production. Higher TOC, TN and TP concentrations in summer represented sufficient inputs from runoff in flood season. Contamination assessment of biogenic elements indicated that TOC and TP in most samples belonged to ClassIpollution, TN belonged to Class II pollution. Samples indicated some toxicity effects on benthos.

• 出版日期2010-7
• 单位暨南大学