造纸污水灌溉对地下水及土壤的影响研究

Influences of Papermaking Sewage Polluted Irrigation Water on Groundwater and Soil

通过对长年用造纸污水污染的A河水灌溉区域、A河水渗漏后的井水灌溉区域和对照区域中地下水和土壤的影响调查试验,研究了长年用造纸污水污染的灌溉水对于地下水以及土壤的影响。结果表明,A河水灌溉区域地下水的总硬度、亚硝酸盐氮、氯化物、硝酸盐氮等值均有增加的趋势;土壤pH值、氮、磷、钾含量变化不大,没有呈现明显增加趋势;土壤的容重降低,孔隙度增加,土壤有机质增多,有利于改善土壤性质;但会导致土壤全盐量的增加以及Cr、Pb、Zn等重金属元素在土壤中的积累。而用A河水渗漏后的井水灌溉对土壤质量影响不大。

Based on the spot investigation and laboratory test of the soil and groundwater quality in the area irrigated with A river water, which has been polluted by papermaking sewage for many years, the area irrigated with well water polluted by A river seepage water and the contrast area, this paper studies the influences of irrigation water polluted by the papermaking sewage for many years on the soil and groundwater. The results show that in the area irrigated with A river water, the total hardness, nitrite nitrogen, chloride, nitrate nitrogen of groundwater all have increasing trend. The soil pH, contents of N, P, K change little, do not show significant increase. The soil volume weight decreases, the porosity and soil organic matter increase, which is better for improving the soil quality. However, it results in the increase of the soil total salinity and the accumulation of Cr, Pb, Zn and other heavy metals in the soil. While irrigation with well water polluted by A river seepage water has little effect on soil quality.