摘要
以往对灌河口附近海域进行地球化学调查发现,海底沉积物及海水质量总体良好,但局部沉积物中Cr含量高于一类标准,Cu、As、Pb、Hg等其他重金属元素含量也明显高于其他地区,个别重金属元素已接近一类标准最高限,存在潜在生态风险。为进一步了解其与人类活动是否有关,对灌河靠近入海口40 km长的河水进行了地球化学调查,发现灌河河水中Hg、Cu、Pb等重金属元素存在一定程度的超标现象。结合其他证据认为,人类活动不仅对灌河下游河水质量产生了负面影响,还对入海口附近的海域环境质量产生了潜在威胁。借鉴内梅罗综合指数评价思路对灌河下游及入海口的重金属元素环境质量进行评价,并对如何降低、消除生态风险提出了若干建议。
Previous geochemical investigations at the mouth of the Guanhe River show that the quality of seabed sediments and seawater is generally good,but the content of Cr in local sediments is higher than the first-class standard. Moreover,the contents of other heavy metal elements such as Cu,As,Pb,Hg are also significantly higher than those in other areas,and some even have approached the maximum of the first-class standard,with potential ecological risks. In order to further understand whether it is related to human activities,we have recently conducted geochemical survey of 40 km long at the mouth of the Guanhe River,and found that Hg,Cu,Pb and other heavy metal elements in the Guanhe River also exceed standard to a certain extent. Combined with other evidence,human activities not only have a negative impact on the quality of the lower reaches of the Guanhe River,but also have a potential threat to the quality of the marine environment at the mouth. This work evaluated the environmental quality of heavy metal elements in the lower reaches of the Guanhe River and its mouth by using the Nemerow comprehensive index for reference,and put forward some suggestions on how to reduce and eliminate ecological risks.
作者
夏同法
梁胜跃
徐明钻
祁超
张江海
徐祖阳
郭炳跃
张珣
Xia Tongfa;Liang Shengyue;Xu Mingzuan;Qi Chao;Zhang Jianghai;Xu Zuyang;Guo Bingyue;Zhang Xun(Jiangsu Institute of Geological Exploration Technology,Nanjing 210049,Jiangsu,China;East China Mineral Exploration and Development Bureau,Nanjing 210007,Jiangsu,China)
出处
《地质学刊》
CAS
2018年第4期641-650,共10页
Journal of Geology
基金
江苏省地质勘查基金专项(2013255)
关键词
环境质量
重金属元素
地球化学
灌河口
江苏灌南
environmental quality
heavy metal element
geochemistry
mouth of the Guanhe River
Guannan in Jiangsu Province
