武汉东湖沉积物的环境地球化学

ENVIRONMENTAL GEOCHEMISTRY OF SEDIMENTS IN LAKE DONGHU,WUHAN

武汉东湖沉积物的地球化学过程受到人类活动的较大影响。本文报道该湖沉积物的沉积性状和ＣＮ、Ｐ、Ｓｉ、Ｃａ、Ｍｇ、Ｆｅ、Ａｌ、Ｍｎ、Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ诸元素在沉积层序中的分布，研究了这些元素的地球化学。通过对东湖污染状况和类型的分析，指出营养物质的积累是导致湖泊生态环境恶化的重要原因，提出可用磷含量作为划分东湖沉积物污染程度的指标的观点。

The distributions of C, N,P,Al,Fe,Ca,Mg,Cu,Zn,Pb,Cd,pH and Eh in the scdimentseries of Lake Donghu in Wuhan were described and anaiysed.The geochemical processes ofthe sediment in this lake have been affected mainly by human activities.Since 1960's,thesedimentation and sediment series in the lake have been disturbed,and the discharge of sew-age water from multiple sources has accelerated the lake's eutrophication. Large amounts ofcarbon, nitrogen and phosphorus have accumulated in the sediment.The accumulation ofthese nutrients is considere to be the major factor aecounting for the deterioration of the lakeenvironment.In addition,the heavy accumulation of phosphorus in the sediment was foundto be synchronous with human disturbance, Hence, the authors are of the opinion that theconcentration ofphosophorus in the sediment may be used as an indicator for the division ofpollution intensities and polluted areas in the sediment of Lake Donghu.