珠江口和北部湾附近海域沉积物重金属生态风险比较  

The contrast of heavy metals' ecological risks in marine sediments between the Beibu Gulf and the Pearl River Delta

作　　者：唐博[1] 龙江平[1,2] 金路[1] 许冬[1] 李团结[3] 

机构地区：[1]国家海洋局第二海洋研究所,浙江杭州310012 [2]浙江大学,浙江杭州310058 [3]国家海洋局南海工程勘察中心,广东广州510300

出　　处：《热带海洋学报》2015年第3期75-81,共7页Journal of Tropical Oceanography

基　　金：国家自然科学基金资助项目(40776037);国家海洋公益性科研专项经费资助项目(201205008;200805063-3);我国近海海洋综合调查与评价专项项目(908-ZC-Ⅱ-05)

摘　　要：文章对比分析了珠江口和北部湾海域附近沉积物重金属元素Zn、Pb、Cu、Cr和沉积物粒度之间的相关性,用沉积物富集系数法和潜在生态危害指数法对两个海域海底沉积物的4种重金属元素污染程度和生态风险进行了评价。结果表明,在黏土和粉砂沉积物中重金属富集程度大。Cu在两个区域均达严重污染程度,Zn、Pb、Cr在珠江口沿岸均达到中等污染程度,在北部湾部分区域达到中等污染程度。珠江口的潜在生态风险等级由低级到高级不等,北部湾生态风险等级均为低级。This study analyzes the heavy metals in the sediments, including Zn, Pb, Cu, Cr, and sediment grain size. It evaluates the degree of pollution and ecological risks of the four heavy metals in the Pearl River Delta and the Beibu Gulf using sediment accumulation coefficient method and HàKANSON L potential ecological hazard index method. We compare the results between the Pearl River Delta and the Beibu Gulf. The comparison shows that the clay and silt enrichment of heavy metals in sediment is large; Cu in the two regions reached the serious level of pollution, Zn, Pb and Cr reached the middle level of pollution in the Pearl River estuary and in part of the Beibu Gulf. The potential ecological risks in the Pearl River estuary range from lower to higher level, and those in the Beibu Gulf are lower. The Pearl River estuary has been severely damaged due to human activities, and the Beibu Gulf, as a national development site, should receive priority to prevent pollutions, and adapt policies to develop and protect the natural environment.

关 键 词：珠江口和北部湾 沉积物重金属 污染程度 潜在生态风险 

分 类 号：P762.2[天文地球—海洋科学]