新型Cd(Ⅱ)配合物制备、理化性质及其对污染土壤中镉的去除

New Cd( Ⅱ) complexes of preparation,physical and chemical properties and separation of cadmium contaminated in soil

针对土壤中重金属镉的污染问题,研发了一种新型的化合物2-巯基乙酸钠镉(Ⅱ)。通过元素分析、火焰原子吸收、FTIR、UV、热重分析法(TGA)、循环伏安(CV)法等表征方法探索镉配合物的结构、稳定性等的理化性能。结合该化合物作为淋洗液对污染土壤中重金属Cd(Ⅱ)进行试验,确定去除效果。镉(Ⅱ)配合物的分子式为Cd(SCH_2COONa)_2,该物质在空气和水体中具有良好的稳定性,不易发生二次反应等良好的性质,新型配合物对土壤中重金属镉具有很好的去除率,平均达到94.73%。

Aiming at the pollution problem of heavy metal cadmium in the soil,the research method of a new compound 2-sodium thioglycolate cadmium（ II）. By means of elemental analysis,flame atomic absorption,FTIR,UV,thermal gravimetric analysis（ TGA） and cyclic voltammetry（ CV）,the physical and chemical properties of the structure and stability of the complexes were characterized. With the compound as the leacheate of the heavy metals in the soil of Cd（ II） test,to determine the removal effect. The conclusion： the molecular formula of cadmium（ II） complex is Cd（ SCH2COONa）2,which has good stability in air and water,and is not easy to have a good property of the two reaction. It is pointed out that the new complex has a good removal rate of heavy metal cadmium in soil,with an average of 94. 73%.