Science and technology of harmless disposal of cultivated land polluted by heavy metals

Recently, in a rice field in Wangcheng District, Changsha City, the staff of Hunan Yongqing Environmental Protection Group are adjusting atmospheric sedimentation collection vessels.

Comprehensive report on agriculture, rural areas and farmers: in 2014, China launched comprehensive remediation of cultivated land polluted by heavy metals, and 1.7 million mu of cultivated land in Changsha, Zhuzhou and Xiangtan, Hunan Province became the first batch of pilot areas. The pilot area is divided into "alternative planting areas". At present, crops are mainly used to replace planting or fallow. On the other hand, the technical model of VIP+n remediation and treatment is being gradually promoted in the areas with moderate and mild pollution. In the treatment, the harmless disposal mode of "special enterprise acquisition, special warehouse storage, special subsidy, special disposal, closed operation" should be carried out for heavy metal over-standard grain, so as to prevent substandard grain from entering the market.

Photo taken by Xinhua News Agency reporter Li Jie