延河沉积物的石油污染调查与分析

对延河干流和两条支流受石油污染河段的沉积物的取样分析结果表明 ,研究河段内的沉积物都不同程度的受到了石油污染。干流河段沉积物的石油污染负荷一般为 40～ 80mg/kg ,上游河段和污染支流汇入段负荷较高 ,平均为390mg/kg,最高可达 784mg/kg ;支流上的坪桥川和杏子河河段沉积物污染负荷为 6 0～ 2 5 0mg/kg。干流中下游及杏子河支流河段的污染沉积物主要来源于雨期流域表层污染土壤径流入河后的沿程沉积 ,而非雨期岸边油井的直接排污则是造成干流上游和坪桥川支流沉积物石油污染的主要原因

AN INVESTIGATION AND ANALYSIS OF PETROLEUM CONTAMINATED RIVER SEDIMENTS OF YANHE RIVER-A BRANCH OF YELLOW RIVER

An analysis has been made of petroleum contaminated river sediments sampled from the main river and two affluent streams of Yanhe River.The results show that river sediments along the investigated river sections are all contaminated by petroleum to a certain extent.Oil contamination loads of the main river sediments generally are 40～80mg/kg,but higher loads, on the average of 390mg/kg and the highest to 784mg/kg,are found in the sediments of upstream and the tributary confluent sections of the main river.Oil loads in the sediments of Pingqiao River and Xingzihe River,two affluent streams of Yanhe River,are from 60～250mg/kg.The contaminated river sediments in Xingzihe River and at middle and downstream of the main river are mainly stemmed from the contaminated sediment runoff on the river basin during rainfall period.Oil pollutants directly discharged into river from oil wells,which are located near to river banks,result in sediment contamination of the upstream and Pingqiao tributary of the main river.