沈阳沈抚灌区上游土壤石油烃污染残留调查及现状评价

以沈阳沈抚灌区上游指定区域为研究对象,监测分析了停灌十多年来土壤中石油烃污染残留状况;采用单项污染指数法和综合污染指数法评价了采样区域的土壤中石油烃污染现状,同时运用Arcgis软件分析绘制了采样区的单项污染指数分布图。结果表明:采样区域石油烃存在残留和污染现象,按照单项污染指数评价,60%的行政村土壤属于高污染级以上。按照综合污染指数评价,80%的行政村土壤属于重污染级。污染指数分布图显示,离主干灌渠的源头越近,污染越严重。对于土壤石油烃修复效果,旱田作业要好于水田作业。

INVESTIGATION AND STATUS EVALUATION OF THE RESIDUES OF SOIL PETROLEUM HYDROCARBON OF THE UPRIVER RANGE OF SHEN-FU IRRIGATION AREA

The upriver designated range of the Shenyang Shen-Fu Irrigation Area was investigated.The residues of soil petroleum hydrocarbon,where the wastewater containing petroleum hydrocarbon had not been used to irrigate the soil for more than 10 years,were monitored and analyzed,and the petroleum hydrocarbon contamination of the sampling area was evaluated with single pollution index and comprehensive pollution index,and the pollution index distribution map was worked out by Arcgis software.The results shows that there are petroleum hydrocarbon residues and pollution in sampling area,and by single pollution index,the soil in 60 percent of administrative villages is at high pollution level and above.By comprehensive pollution index,the soil in 80 percent of administrative villages is at heavy pollution level.The pollution index distribution map shows that the closer the area is from the headstream of main irrigation canal,the heavier the soil pollution would be.The remediation effect of petroleum hydrocarbon contamination is better by dry field operation than that by paddy field operation.