渔业科学进展2017，Vol.38Issue(2)：16-23,8.DOI:10.11758/yykxjz.20160222002
黄河口附近海域表层沉积物重金属污染状况及年际变化分析
Pollution Status and the Annual Variations of Heavy Metals in the Surface Sediments in the Adjacent Sea Water of the Yellow River Estuary
摘要
Abstract
According to the monitoring results of the surface sediment samples from five cruises of 150 survey stations from 2006 to 2014 collected in the adjacent sea water of the Yellow River estuary,the pollution status and the annual variations of the seven kinds of heavy metals Hg,Cu,Pb,Cd,Cr,Zn and As in the sediments were analyzed.The methods of single factor standard index and potential ecological risk index were used to evaluate the status of heavy metal pollution and potential ecological risk degree.The results showed that the contents of heavy metals met the first class standard requiement of the Marine Sediment Quality except a few stations investigated in 2011 exceeded the first class standard.The contents of Hg and Cd were equal,which were obviously lower than that of the other five heavy metal elements.And the annual variations of the seven heavy metals were different from each other.The average single factor standard indices of the seven heavy metals were all less than 1,which indicated that the quality status of the surface sediment in the survey area was good.The order of the annual average single factor standard indices of the seven heavy metals was Cu＞Cr＞As＞Pb＞ Cd＞Hg＞Zn.And the standard index value of Cu was higher than the others,even the average standard index of Cu reached 0.61 in recent ten years,which should be paid attention to and strengthened routine monitoring.And the single factor standard indices for the other six heavy metal elements were all less than 0.4.Further potential ecological risk assessment results showed that the average potential ecological risk factors Eri of seven heavy metals of all cruises were less than 40,which presented a low level ecological risk.And the order of Eir for seven heavy metals in recent ten years was Hg＞Cd＞As＞Pb＞Cu＞Cr＞Zn,where Hg was the main potential ecological risk factor in the survey area.The annual variations of the comprehensive potential ecological risk index RI ranged from 32.18 to 53.12,which indicated a low level of ecological risk.Basically,the trend of the annual variations of RI was increasing first,then decreasing,and then a slight increasing.关键词
黄河口/表层沉积物/重金属/污染/年际变化Key words
Yellow River estuary/Surface sediments/Heavy metals/Pollution/Annual variations分类
资源环境引用本文复制引用
胡琴,李强,黄必桂,曲亮,曹静..黄河口附近海域表层沉积物重金属污染状况及年际变化分析[J].渔业科学进展,2017,38(2):16-23,8.基金项目
中海石油(中国)有限公司科技项目(YXKY-2016-ZY-07)资助[This work was supported by Science and Technology Project of China National Offshore Oil Corporation (YXKY-2016-ZY-07)]. （中国）
