【摘要】 Zr-MOFs由于其高比表面积和在水体中的高稳定性,在湿法冶金领域已引起高度关注.论文选择Zr-MOFs作为改性基体材料,通过季铵化反应将季铵活性基团引入Zr-MOFs基体中,构建季铵离子液体吸附剂ZJU-101,用于废水中Pd（CN）₄^2-,Co（CN）₆^3-和Fe（CN）₆^3-的吸附.ZJU-101在中性和弱碱性溶液中具有较高稳定性,吸附性能测试表明,在pH=7.0条件下,ZJU-101对Pd（CN）₄^2-的最大吸附容量为126.0 mg·g^-1,季铵基团的引入对吸附能力的提升起到关键作用.两步洗脱法可以将Pd（CN）₄^2-从Pd（CN）₄^2-,Co（CN）₆^3-,Fe（CN）₆^3-的混合溶液中进行有效分离.重复实验显示,经5次循环,ZJU-101分离金属氰化物混合液中Pd（Ⅱ）的回收率>93.0%,通过FT-IR、XPS、Zeta电位和静电势图分析,证实了ZJU-101吸附Pd（CN）₄^2-的机理是一个阴离子交换过程.更多还原

【Abstract】 Because of its high specific surface area and high stability in water,Zr-MOFs has attracted great attention in the field of hydrometallurgy.In this paper,Zr-MOFs was selected as modified matrix materials.The quaternary ammonium active groups were introduced into Zr-MOFs matrix through quaternary-ammoniumfunctionalized reaction.A quaternary ammonium ionic liquid adsorbent ZJU-101 was constructed for adsorption of Pd（CN）₄^2-,Co（CN）₆^3-,and Fe（CN）₆^3- from wastewater.ZJU-101 has high stability in neutral and weakly alkaline solutions.The adsorption performance test showed that the maximum adsorption capacity of ZJU-101 for Pd（CN）₄^2- was 126.0 mg·g^-1 at pH=7.0.Introduced quaternary ammonium groups plays a key role in improving the adsorption capacity.The two-step elution method can efficiently separate Pd（CN）₄^2- in the mixture solution containing Pd（CN）₄^2-,Co（CN）₆^3-,and Fe（CN）₆^3-.Repeated experiments showed that after five cycles,ZJU-101 separated Pd（Ⅱ） from metal cyanide mixture solution with a recovery rate over 93.0%.The mechanism of ZJU-101 adsorption Pd（CN）₄^2- was confirmed to be an anionexchange process by the analysis of FT-IR,XPS,zeta potentials and the electrostatic potential map.更多还原