象山港海底沉积物中重金属的赋存形态

The Speciation of Heavy Metals in Marine Sediment at Xiangshan Harbor

以象山港海底沉积物为研究对象,采用了五步连续萃取法对象山港区域表层沉积物中重金属(Fe、Mn、Cu、Zn)赋存形态进行了研究,分析了各形态重金属在象山港不同采样点中的分布特征和影响因素。结果表明,象山港海域表层沉积物中各重金属元素主要来源于自然输入的残留态,人为输入的各种活性形态所占比例相对较少,但受两种因素的影响的差距较小。其中Fe和Zn主要以铁锰氧化物结合态及残留态存在,Mn主要以碳酸盐结合态及铁锰氧化物结合态存在,Cu主要以残留态存在。总体上而言象山港表层沉积物中的重金属环境稳定性较弱,重金属污染程度较重。

Based on the Xiangshan harbor sediment,using the five-step extraction method,the speciation of heavy metals in marine sediment（Fe,Mn,Cu,Zn）at region of Xiangshan port was researched,the analysis of patterns of heavy metals at different sampling Xiangshan point in the distribution of characteristics and influencing factors was done.The results show that the sea surface sediments of the heavy metal elements mainly come from the natural input of the residual state,enter a variety of man-made form of the proportion of activity in a relatively small,but the two factors of the gap between the smaller.Fe and Zn mainly in iron-manganese oxide bound and residual states exist,Mn mainly carbonate-bound and iron-manganese oxide bound existence,Cu exist mainly residual state.Xiangshan port in terms of overall surface sediments on the stability of heavy metals in the environment is weak,the extent of heavy metal pollution heavy.