摘要
为评价污水灌溉区农田土壤重金属污染状况,采用单因子指数和综合多因子指数法,对沈阳西郊污灌区农田土壤重金属铜锌铅的污染特征进行了研究。结果表明,于洪区宁官、高明、胡孤家和四台子四个样点土壤均受到三种重金属污染,其中宁官点0～10 cm土层铜、锌、铅含量分别达到69.74 mg.kg-1、275.09 mg.kg-1和81.83mg.kg-1,分别是当地土壤背景值的2.82、4.59和3.60倍。各样点土壤有效态铜、锌、铅含量也远高于未受污染地区的平均含量,土壤铜、锌、铅有效态含量占全量的比例分别为4.65%～15.46%、1.36%～3.84%和5.46%～18.86%。说明沈阳西郊污灌区农田土壤重金属污染较严重,必须通过工程、生物及化学措施进行长期的污染治理。
The farmland soils in western Shenyang suburb, Liaoning Province of China were irrigated with waste waster in late of the last century. To assess heavy metal contamination status in soils irrigated with waste water, the characteristics of Cu, Zn and Pb pollution in farmland soils of western Shenyang suburb were evaluated using single-factor indices and multiply-factor indices. The results show that all the test soils in Ningguan, Gaoming, Hugujia and Sitaizi were contaminated by Cu, Zn and Pb. Total content ofCu, Zn and Pb in 0-10 cm layer of the Ningguan site were up to 69.74mg·kg^-1, 275.09mg·kg^-1and 81.83mg·kg^-1, respectively, and the pollution indices based on background values were 2.82, 4.59 and 3.60, respectively. The available Cu, Zn and Pb were also higher in the test soils than in the unpolluted soils. The ratios of available to total content of Cu, Zn and Pb were 4.65%-15.46%, 1.36%-3.84% and 5.46%-18.86%, respectively. It is concluded that the test soils in waste water irrigation area of westem Shenyang suburb were heavily contaminated, suggesting that engineering, biological and chemical measures must be taken to remedy contaminated soils in a long period.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2009年第1期134-137,共4页
Journal of Liaoning Technical University (Natural Science)
基金
国家科技支撑计划重点项目(2008BADA7B08)
辽宁省自然科学基金资助项目(20052013)
关键词
农田
土壤污染
重金属污染
铜
锌
铅
污水灌溉
farmland
soil pollution
heavy metal pollution
copper
zinc
lead
waste water irrigation
