Distribution, enrichment and source of heavy metals in surface sediments of the eastern Beibu Bay, South China Sea

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• 作者：Yanguang Dou^a ; ^b ; Jun Li^a ; ^b ; ^{junli741001@gmail.com} ; Jingtao Zhao^a ; ^b ; Bangqi Hu^a ; ^b ; Shouye Yang^c
• 关键词：Distribution ; Enrichment Factor ; Sources ; Heavy Metals ; Surface Sediments ; Eastern Beibu Bay
• 刊名：Marine Pollution Bulletin
• 出版年：2013
• 出版时间：15 February, 2013
• 年：2013
• 卷：67
• 期：1-2
• 页码：137-145
• 全文大小：792 K

文摘

Sixty-nine samples of surface sediments (0¡«5 cm) recovered from the eastern Beibu Bay were analyzed for TOC and heavy metals to examine the element distribution pattern and potential pollutant sources. The sediments in the study area are characterized by variable heavy metal concentrations that are comparable with those of the surrounding regions. Obvious positive correlations were observed amongst the concentrations of Zn, Cr, Pb, Cd, Cu and the clay contents, suggesting that fine clay particles are important carriers of trace metals in the sediments. Hg and As show a considerable/low positive correlation with TOC, indicating that organic matter may play a discernible role in the sediment chemistry. Cd contamination was detected in the north of the study area primarily due to the input of phosphate fertilizers carried by rivers. In comparison, Zn, Cr, Pb, and partly Cu are predominantly sourced from lithogenic components, and Hg and As are mainly from organic matter related to anthropogenic input.