某灌区土壤中重金属镉污染调查

对沈阳市郊某污灌区土壤中重金属镉的污染状况进行了调查.结果表明,2000年土壤中镉质量比为0.23 mg/kg～5.55 mg/kg,最高值超标17.5倍;平均值为2.02 mg/kg,属严重污染,污染程度仍处在停耕前水平;污灌区土壤镉含量与土壤深度有关,深度为16 cm～30 cm污染最重,51 cm～80 cm污染最轻.

Survey ofthe Cadm ium Pollution in an Irrigation AreasSoil

In this article, the pollution situation of Cadmium had been investigated in an irrigation areas used wastewater of Shenyang city. The results showed that the quality ratio of Cadmium was 0.23 mg/kg to 5.55 mg/kg in the soil in 2000. The highest value exceeds 17.5 times than the National Standard, and the average data was 2.02 mg/kg, so the soil had been badly polluted and the degree of pollution was still in the level of former stopped-furrow. In addition, there was relation between the quality ratio of Cadmium and the soil depth, the most pollution was in the depth level of 16 cm to 30 cm and the best soil was in 51 cm to 80 cm.