不同水质灌溉对土壤中重金属积累和分布的影响

Affection of the Heavy Metals Accumulation and Distribution in Soil Column under Different Sewage Irrigation

通过对邯郸市5种水质灌区的土壤中重金属含量测定,结果发现:不同水质灌溉对重金属在土壤中积累影响不同,基本表现为工业污水灌溉>混合污水灌溉>生活污水灌溉>中水灌溉>井水灌溉,无论何种水质灌溉,4种重金属在土壤中积累趋势为Pb>Zn>Cu>Cd,分布趋势为表聚或低聚现象,土壤中4种重金属含量均未超标。分析表明,用中水灌溉是可行的,可以为邯郸市污水灌溉提供技术支撑。

In this paper, the content of heavy metals in soil column were measured and analyzed through sampling and chemical test in different sewage irrigation areas in Handan. The results show that the different sewage irrigation affected the heavy metals accumulation and distribution differently. Elementary reflection is industrial effluent〉 mixed sewage〉 living sewage〉reclaimed water〉well water. No mater what, the tendency of four heavy metals accumulation in soil was Pb〉Zn〉Cu〉Cd, and distribution tendency is surface aggregation phenomenon or deep aggregation phenomenon. The content of four heavy metals in soil didn＇t exceed the value of the irrigation standards. So the result is that irrigation with reclaimed water was feasible.