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全国污灌区调查结果显示,在约140万hm2的污水灌区中,遭受重金属污染的土地面积占污水灌区面积的64.8%,其中轻度污染的占46.7%,中度污染的占9.7%,严重污染的占8.4%。据环保总局的调查显示,珠三角、长三角、环渤海等经济发达地区,都面临着严重的土壤污染问题。其中,珠三角40%农田金属污染超标,致使粮食减产,经济损失不断增大。土壤重金属污染可引起植物生理功能紊乱,营养失调,而且通过食物链进入人体后,潜在危害极大,土壤重金属污染急需得到治理和修复。
The survey results of the national sewage irrigation area showed that in the irrigated area of about 1.4 million hm2, the area of land suffering from heavy metal pollution accounted for 64.8% of the area of sewage irrigated area, of which 46.7% were lightly polluted, 9.7% were moderately polluted and seriously polluted Accounted for 8.4%. According to the survey conducted by the State Environmental Protection Administration, the economically developed areas such as the Pearl River Delta, the Yangtze River Delta and the Bohai Rim are facing serious soil pollution problems. Among them, 40% of the Pearl River Delta farmland metal pollution exceeded, resulting in reduced production of grain, increasing economic losses. Soil heavy metal pollution can cause plant physiological disorders, malnutrition, and through the food chain into the human body, the potential for great harm to soil heavy metal pollution in urgent need of governance and repair.