渤海中部海域沉积物中Hg的校正及其空间分布特征

发布时间：2018-02-23 18:41

本文关键词： 渤海沉积物水体汞二次污染　出处：《渔业科学进展》2016年04期 　论文类型：期刊论文

【摘要】：以2013年5月从渤海采集到的表层沉积物及水样为研究对象,对渤海中部海域汞(Hg)的空间分布规律进行分析。结果显示,沉积物中,Hg的含量为(1.058 9.256)×10~(-3)mg/kg,平均值为4.781×10~(-3)mg/kg;水体中,Hg的含量为0.005 0.240μg/L,平均值为0.090μg/L。由于沉积物的粒度组成是影响重金属元素沉积中最显著的影响因素之一,故本研究采用归一化法对Hg的"粒度效应"进行校正,并以水体中的Hg作为参照与校正结果进行对比,来分析沉积物中的Hg对周边环境造成的影响。将校正后沉积物与水体中的Hg进行相关性分析,二者相关性显著(R=0.634,P0.001,n=29)。推测,水体中的Hg主要来自于沉积物中Hg的释放。由此可见,这种"二次污染"会对周边环境造成长期的危害,在治理的过程中需要引起重视。
[Abstract]:Taking the surface sediments and water samples collected from the Bohai Sea in May 2013 as the research object, the spatial distribution of HG) in the central Bohai Sea is analyzed. The results show that, The content of Hg in sediments was 1.058 卤9.256) 脳 10 ~ (10) ~ (-3) mg 路kg ~ (-1) with an average of 4.781 脳 10 ~ (10) ~ (-3) mg 路kg ~ (-1), and that in water was 0.005 ~ 0.240 渭 g 路L ~ (-1) with an average of 0.090 渭 g 路L ~ (-1). The grain size composition of sediments was one of the most significant factors affecting the deposition of heavy metal elements. In this study, the "particle size effect" of Hg was corrected by normalized method, and the results were compared with that of Hg in water. In order to analyze the effect of Hg in sediment on the surrounding environment, the correlation between the corrected sediment and Hg in water was analyzed, and the correlation between them was significant. It is inferred that Hg in water comes mainly from the release of Hg from sediment. This kind of secondary pollution will cause long-term harm to the surrounding environment.
【作者单位】：农业部海洋渔业可持续发展重点实验室山东省渔业资源与生态环境重点实验室中国水产科学研究院黄海水产研究所;
【基金】：农业部溢油专项“渤海生态环境监测与评估”(农办渔【2012】117号)和“应对溢油关键技术专项研究”(2012-NZ-5739)共同资助
【分类号】：X834;X55

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