农用地土壤污染的安全利用措施及应用——以闽东北某废弃矿山为例

Safe Utilization Measures and Application of Soil Pollution in Agricultural Land——Taking an Abandoned Mine in Northeast Fujian as an Example

为充分利用轻微污染或轻中度污染耕地,采用石灰类调节和种植结构调整措施对受污染耕地进行修复。结果表明:轻度-中度污染区域耕地采用石灰调节,中度-重度污染区域采用种植结构调整+石灰调节(水作亩施200 kg、旱作150 kg、茶园100 kg),农产品可食用部位重金属含量均低于(GB 2762-2017)和(NY 659-2003)中污染的限量值。修复治理后,区域内茶叶对镉的BCF(0.0228)最低,上海青和芥菜对铅的BCF(0.0001)最低,芥菜对镉铅复合污染的BCF总体较低,修复治理效果最佳。

Cultivated land with slight or moderate pollution is fully utilized.Lime regulation and planting structure adjustment measures are used to realize the remediation of polluted cultivated land.The results showed that the contents of heavy metal in edible parts of agricultural products were lower than the pollution limit values in(GB 2762-2017)and(NY 659-2003).In mild to moderate pollution areas,the cultivated land was regulated by lime;in moderate to severe pollution areas,the planting structure was regulated by lime(200kg/mu for paddy field,150kg/mu for dry farming and 100kg/mu for tea field).After remediation,the BCF(0.0228)of tea to cadmium was the lowest.The BCF(0.0001)of Shanghai Qing and mustard to lead was the lowest.The BCF of mustard to cadmium lead compound pollution was generally low,and the remediation effect was the best.