以中山市坦洲镇轻污染农田为研究对象,开展了铁基生物炭土壤调理剂、某研究所自主研发的土壤改良剂对土壤镉、铅污染修复效果的研究.结果表明两种钝化剂均能显著降低蔬菜中的镉含量;对铅的效果一般;土壤改良剂的修复效果优于铁基生物炭.对于同水平的轻污染农田,铁基生物炭调理剂最佳施用量为基准用量,即1 亩50 kg,土壤改良剂的最佳施用量为基准用量的1.5 倍用量,即1 亩150 kg.施用后,土壤pH 基本都有一定的下降.总镉、总汞、总铅、有效态镉、有效态铅基本均呈明显的减少.总铬呈现增减的略微波动.总砷略微增加.有机质明显增加.%Taking the light polluted farmland in Tanzhou town of Zhongshan city as the research object, Fe-loaded biochar soil conditioner and the soil amendments made by a research institute were studied on the remediation effect of cadmium and lead in soil. The results showed that two kinds of passivating agents could significantly reduce the content of cadmium in vegetables; the effect on lead was general; the remediation effect of soil amendments was better than that of Fe-loaded biochar. For the same level of light polluted farmland, the best application amount of Fe-loaded biochar is standard quantity, which is 50kg per mu, and the one of soil amendments is 1.5 times of the standard quantity, that is 150 kg per mu. After application, the pH value of soil decreased to a certain extent. The amount of total Cd, totalHg, Pb, available Cd and Pb decreased obviously. The amount of total Cr slightly fluctuated in the increase or decrease. The total as is slightly increased. Organic matter increased significantly.
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