唐山附近海域春季表层沉积物重金属含量年际变化及污染评价
根据2006–2015年4个航次对唐山附近海域共70个采样站位的表层沉积物调查资料,分析了沉积物中Hg、Cu、Pb、Cd、Cr、Zn和As 7种重金属的含量和年际变化特征,并利用超标率统计法、地累积指数法和潜在生态风险指数法对其污染状况进行了评价。结果显示,调查海域表层沉积物中重金属含量总体水平较低,除个别站位的Cu和As超过第Ⅰ类标准值外,其他调查站位的重金属含量均符合第Ⅰ类标准。2006–2015年调查海域表层沉积物中7种重金属含量的年际变化略有不同,其中,Cu、Pb、Cd和Zn 4种重金属含量相对比较稳定,Hg和Cr的含量表现为先升高后降低的趋势,而As的变化趋势不明显。地累积指数法评价...
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| Published in | 渔业科学进展 Vol. 38; no. 3; pp. 22 - 30 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
2017
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| Subjects | |
| Online Access | Get full text |
| ISSN | 2095-9869 |
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| Summary: | 根据2006–2015年4个航次对唐山附近海域共70个采样站位的表层沉积物调查资料,分析了沉积物中Hg、Cu、Pb、Cd、Cr、Zn和As 7种重金属的含量和年际变化特征,并利用超标率统计法、地累积指数法和潜在生态风险指数法对其污染状况进行了评价。结果显示,调查海域表层沉积物中重金属含量总体水平较低,除个别站位的Cu和As超过第Ⅰ类标准值外,其他调查站位的重金属含量均符合第Ⅰ类标准。2006–2015年调查海域表层沉积物中7种重金属含量的年际变化略有不同,其中,Cu、Pb、Cd和Zn 4种重金属含量相对比较稳定,Hg和Cr的含量表现为先升高后降低的趋势,而As的变化趋势不明显。地累积指数法评价结果显示,7种重金属的地累积指数(Igeo)多年平均值为Hg〉Cd〉Pb〉Cu〉As〉Cr〉Zn;而潜在生态风险评价结果显示,7种重金属的潜在生态风险系数(E_r^i)多年平均值为Hg〉Cd〉As〉Pb〉Cu〉Cr〉Zn;两种污染评价结果一致,均显示Hg是唐山附近海域表层沉积物的主要污染因子,潜在生态风险最大。综合潜在风险指数(RI)年际变化范围为44.26–153.18,平均值为89.92,属于低生态风险水平;RI年际变化基本表现为先升高后降低的趋势,表明近年来调查海域表层沉积物重金属的污染状况有所改善。 |
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| Bibliography: | Tangshan; Surface sediments; Heavy metals; Inter-annual variations; Pollution assessment HU Qin1, GUO Jing1, YIN Xiaona1, QU Liang2, CAO Jing1 (1. China National Offshore Oil Corporation Research Institute, Beijing 100028; 2. North China Sea Environmental Monitoring Center, State Oceanic Administration, Qingdao 266033) Current study surveyed 70 sampling stations through four cruises in the adjacent seawater near Tangshan between 2006 and 2015. The contents and inter-annual variation characteristics of seven heavy metals: Hg, Cu, Pb, Cd, Cr, Zn and As in the surface sediment were analyzed. The single-factor exceeding rate, geo-accumulation index (lgeo) and the comprehensive potential ecological risk index (RI) were used to evaluate the pollution degree. The results showed that the overall levels of the heavy metal contents in the surface sediment were low in the survey areas. Specifically, Cu and As contents in several stations exceeded the first class standard value, whereas the contents of other heavy metals a |
| ISSN: | 2095-9869 |