内蒙古东部污灌区土壤重金属迁移规律的研究

Migration of Heavy Metals in Soils Receiving Effluent Irrigation in Eastern Inner-Mongolia

通过对内蒙古东部污灌区土壤的土层剖面不同深度重金属(Cr、Cu、Cd、Pb)元素进行测试和分析,揭示重金属在垂直方向上的浓度变化趋势。结果表明,随着土层加深重金属含量减少,经过十几年的污水灌溉,当地的地下水目前没有受到污染,这说明重金属在土壤中的迁移具有随着土层厚度增加而减弱的趋势。

We analyzed and evaluated contents of several heavy metals （ Cr, , Cu, Cd, Pb） in soil samples at different depths collected from eastern Inner Mongolia receiving effluent irrigation. We studied and opened out the relation between the concentration change of heavy metals in uprightness and soil characters. The results showed that after more than ten years＇ effluent irrigation, ground water has not been polluted. In addition, the results also showed that the migration of heavy metals was decreasing progressively, following the increase in thickness of the soil.