第二松花江中下游沉积物汞的时空变化规律  

Temporal and Spatial Variation Rule of Mercury in Sediments in Middle and Lower Reaches of the Second Songhua River

作　　者：孙晓静[1] 王起超[1] 邵志国[1] 

机构地区：[1]中国科学院东北地理与农业生态研究所

出　　处：《环境科学》2007年第5期1062-1066,共5页Environmental Science

基　　金：国家自然科学基金项目(40371100);中国科学院知识创新工程重要方向项目(KZCX3-SW-437);国家重点基础研究发展规划(973)项目(2004CB418502)

摘　　要：将19731、976、1983、1991年和本次的研究结果进行对比分析,得出了第二松花江中下游表层沉积物汞含量的时间变化规律.1976年以前汞含量处于增加趋势;1976-1982年汞含量有所下降;1982年汞污染源被切断,汞含量骤降;随后,汞污染浓度处于缓慢净化时期.将本次采集的沉积物样品分为3个粒度等级,最后以63μm粒级的沉积物汞含量为代表分析了汞的水平变化规律,总体趋势是,排污口处汞含量最高;哨口至朝阳桥断面汞含量增加;朝阳桥至五家站断面,汞含量骤降,在五家站断面汞含量达到最小值;五家站至泔水缸断面汞含量又略有增加.并给出了本次研究中各断面沉积物汞的垂直变化规律.Temporal variation rule of mercury during 1973, 1976, 1983, 1991 and 2004 in surface sediments from the Second Songhua River was get. Mercury levels increased before 1976 and decreased on a certain extent in 1976 - 1982 ; mercury pollution source was halted in 1982, so mercury levels fell greatly; in the following years, mercury levels was in the slow purification time. Sediment samples taken this time were divided into three granularity scales. Based on sediments of 63 μm granularity, the horizontal variation rule was analyzed. Mercury levels reached the maximum at the pollution source site, increased from Shaokou Segment to Chaoyangqiao Segment, and fell largely from Chao ngqiao Segment to Wujiazhan Segment, where mercury levels attained the minimum. And mercury levels slightly increased from Wujiazhan Segment to Ganshuigang Segment. In addition, the vertical variation rule of mercury levels in sediments of typical segments was shown.

关 键 词：第二松花江 沉积物 汞含量 变化规律 

分 类 号：X131.2[环境科学与工程—环境科学] X143