华东沿海滩涂区表层沉积物重金属含量特征及风险评价

发布时间：2018-01-11 05:07

本文关键词：华东沿海滩涂区表层沉积物重金属含量特征及风险评价　出处：《环境科学》2017年11期 　论文类型：期刊论文

【摘要】：为了解华东(江苏省、上海市、浙江省和福建省)沿海滩涂表层沉积物中As、Cd、Cr、Cu、Hg、Pb、Zn等重金属含量特征、来源及污染风险.采用数理统计、相关性分析、因子分析等方法对华东沿海滩涂区表层沉积物1 906件样品的As、Cd、Cr、Cu、Hg、Pb、Zn等7种重金属进行了系统研究.结果显示华东沿海滩涂区表层沉积物中As、Cd、Cr、Cu、Hg、Pb、Zn等7种重金属总体含量不高,其中江苏省沿海滩涂表层沉积物重金属总体含量较低,上海、浙江沿海滩涂表层沉积物重金属总体含量较高;上海、浙江沿海滩涂表层沉积物重金属除了自然成因,受人为活动影响较大,江苏沿海表层滩涂沉积物受人为活动影响相对较轻,其中Hg在上海、浙江、福建滩涂受人为活动影响尤为严重,Cd、Cu在上海、浙江滩涂受人为活动影响尤为严重.采用海洋沉积物污染指数和平均沉积物质量基准商进行评价,结果显示,华东沿海滩涂区沉积物总体污染物生态风险较低,江苏省和福建省滩涂生态风险较低,上海市和浙江省滩涂生态风险相对较高.
[Abstract]:In order to understand the characteristics of heavy metal contents in the surface sediments of coastal tidal flat in east China (Jiangsu, Shanghai, Zhejiang and Fujian). Source and pollution risk. Using mathematical statistics, correlation analysis, factor analysis and other methods, 1 906 samples of surface sediments from coastal shoal area of East China were collected. Seven kinds of heavy metals such as Zn and other heavy metals were systematically studied. The results showed that the total contents of 7 heavy metals such as Aspergectadecrhium cu HgPbN Zn and so on in the surface sediments of the coastal shoal area of East China were not high. The content of heavy metals in the surface sediments of Jiangsu Province is lower than that in the coastal sediments of Shanghai and Zhejiang. In addition to the natural causes, heavy metals in the surface sediments of coastal shoals in Shanghai and Zhejiang were greatly affected by human activities, while the sediments of coastal shoals in Jiangsu were relatively less affected by anthropogenic activities, among which Hg was found in Shanghai and Zhejiang. The impact of human activities on tidal flat in Fujian is especially serious in Shanghai, and that on beach in Zhejiang is especially serious. The pollution index of marine sediment and the standard quotient of average sediment quality are used to evaluate. The results showed that the overall ecological risk of pollutants was lower in the coastal shoal area of East China, lower in Jiangsu Province and Fujian Province, and higher in Shanghai and Zhejiang Province.
【作者单位】：中国地质大学地球科学学院;中国地质调查局南京地质调查中心;
【基金】：中国地质调查局地质调查项目(1212011220053)
【分类号】：X55;X824
【正文快照】： 我国人均耕地资源占有量小,随着城镇化加快,可利用土地资源越来越少,滩涂围垦在解决人地矛盾和提供自然资源方面发挥了巨大作用,自古以来我国就有围海造田的历史,尤其是建国以来,人口众多土地资源紧张的背景下,大面积的滩涂围垦作为一种缓解土地资源紧张的一种开发方式尤为重

【相似文献】