盐城北部潮间带表层沉积物重金属分布特征及污染评价

发布时间：2018-01-04 01:28

本文关键词：盐城北部潮间带表层沉积物重金属分布特征及污染评价　出处：《海洋环境科学》2016年02期 　论文类型：期刊论文

【摘要】：对采自盐城北部潮间带的241个表层沉积物样进行测试分析,探讨了沉积物中重金属(Cu、Pb、Zn、Cr、Cd、As、Hg)空间分布特征及各元素相关关系,并采用Hakanson潜在生态风险指数法进行了污染评估。结果表明:1)研究区重金属Zn、Pb、Hg含量均符合国家规定的一类沉积物标准,Cr、Cd、Cu、As含量在大部分站位也都低于一类沉积物标准,其中Cr仅在个别站位处达到二类沉积物标准,Cd、Cu、As在少数站位达到二类沉积物标准。2)研究区Cu、Pb、Zn、As四种元素在物源或迁移累积特征上具有相似性,Cd元素不受元素"粒度控制律"控制。3)研究区重金属总体污染和潜在生态危害处于低风险级别,重金属潜在生态危害系数由大到小依次为:CdAsCuPbCrZnHg。
[Abstract]:Test analysis on the collected from northern Yancheng intertidal zone of 241 surface sediment samples, discusses the heavy metals in the sediments (Cu, Pb, Zn, Cr, Cd, As, Hg) and the spatial distribution characteristics of elements and the correlation between the Hakanson potential ecological risk index method of pollution assessment. The results showed that: 1) the study area of heavy metals of Zn, Pb, Hg contents are consistent with a sediment standard prescribed by the state, Cr, Cd, Cu, As content in most stations are lower than a sediment standard, which Cr only at some stations to two types of sediment standard, Cd, Cu, As reached two.2 sediments. In a few stations) study area Cu, Pb, Zn, As four elements are similar in the accumulation of provenance or migration, Cd elements from elements of the "size control law" control.3) overall pollution of heavy metal in study area and potential ecological risk in the low level of risk, the potential ecological risk of heavy metals by coefficient To the smaller one is the following: CdAsCuPbCrZnHg.

【作者单位】：地球化学勘查与海洋地质调查研究院;
【基金】：长江三角洲海岸带综合地质调查与监测(江苏潮间带)(GZH201200506)
【分类号】：X55
【正文快照】： 潮间带沉积物是生物栖息及陆海物质交换、污染物接纳与自净的重要场所,也是陆源重金属元素的汇和二次重金属污染的源[1]。江苏盐城沿海地区近年来聚集了大量的化工企业,污染企业主要分布在沿海和入海河流附近,近岸海域环境污染日趋严重,其中以重金属污染最为突出。因此,对海洋

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