Method for improving leaching efficiency of GLDA in leaching of heavy metals in soil

The invention belongs to the technical field of soil remediation, and particularly discloses a method for improving the leaching efficiency of GLDA in leaching of heavy metals in soil. The method specifically comprises the following steps: mixing an aqueous GLDA solution with citric acid to obtain a leaching agent, then mixing the leaching agent with contaminated soil, and carrying out leaching. According to the invention, the leaching effect of a GLDA-containing mixed/composite solution on soil heavy metals is superior to the sum of respective leaching effects of the components of the GLDA-containing mixed/composite solution, and the GLDA-containing mixed/composite solution has a synergistic effect. After the mixed solution is adopted to soil leaching, heavy metals in the soil can be effectively removed, and residual sodium is cleaned with clear water. 本发明属于土壤修复技术领域，具体公开了一种提高GLDA淋洗土壤重金属效率的方法。所述方法具体为：将GLDA水溶液与柠檬酸混合后得到淋洗剂，然后将淋洗剂与污染土壤混合并进行淋洗。本发明含GLDA的混合/复合液对土壤重金属的淋洗效果优于各自分别淋洗之和，具有协同作用。采用该混合溶液对土壤淋洗后，可以有效去除土壤的重金属