钦州湾南部表层沉积物重金属分布及生态危害评价

发布时间：2018-04-07 17:06

本文选题：钦州湾　切入点：表层沉积物　出处：《海洋科学进展》2017年02期

【摘要】：分析2013年钦州湾南部海域的表层沉积物样品,拟对其7种重金属元素质量分数的空间分布特征进行探讨。采用单因子污染指数法和潜在生态危害指数法对沉积物污染程度及其潜在生态危害进行评价,并利用主成分分析法对其重金属的潜在来源进行解析,结合2011年和2012年同区的调查数据对近3a来重金属质量分数的变化趋势进行研究。研究发现:重金属Pb,Cr,Hg,As质量分数在研究区中南部海域较高,Cu和Zn在犀牛脚外侧海域质量分数整体较高,Cd在研究区西北侧的钦州港南部海域质量分数较高;Cd的生态危害达到中度危害水平,其他6种重金属(Cu,Pb,Zn,Cr,Hg,As)生态危害程度较轻;重金属的潜在来源主要为钦州港周边海上交通排污、港口疏浚和周边河流陆源排污;2013年调查的Zn和Hg质量分数均明显高于2011年和2012年的。
[Abstract]:Analysis of surface sediment samples from Qinzhou Bay in 2013 in southern waters, intends to discuss the 7 kinds of heavy metals concentration spatial distribution. Using the method of single factor pollution index and potential ecological risk index method to evaluate the degree of sediment pollution and potential ecological risk, and using principal component analysis method of the potential sources of heavy metals were analysis, combined with the trend of the survey data in 2011 and 2012 with the heavy metal content of nearly 3A were studied. The study found that heavy metals of Pb, Cr, Hg, As, the quality of higher scores in the study area in central and southern waters, Cu and Zn in Xiniujiao outer sea mass fraction of Cd in the overall higher, higher research area in Northwest China Qinzhou side of the southern sea quality score; the ecological hazard of Cd at moderate risk level, the other 6 kinds of heavy metals (Cu, Pb, Zn, Cr, Hg, As) ecological hazards of heavy metals hidden lighter; The main sources were sewage discharge around the Qinzhou port, port dredging and land-based drainage of the surrounding rivers. The mass fraction of Zn and Hg in 2013 was significantly higher than those in 2011 and 2012.

【作者单位】：国家海洋局第一海洋研究所;钦州市海洋环境监测预报中心;山东省海洋资源与环境研究院;
【基金】：中央级公益性科研院所基本科研业务费专项资金资助项目——海岸带保护区保护范围选划方法研究(2014G16);小尺度下的海岛景观格局变化研究(2013G14)
【分类号】：X55;X826

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