N-甲基-2-硫-咪唑树脂对钯吸附的研究

Study On The Sorption Of N-Methyl-2-Thioimidazole Resin For Palladium

测定了N-甲基-2-硫-咪唑树脂对钯Pd(Ⅱ)吸附的容量,Pd(Ⅱ)与Fe^(3+)、Cu^(2+)、Ni^(2+)、Mn^(2+)的分离系数、吸附Pd(Ⅱ)的速率常数、Freundlich吸附常数。通过化学法、红外光谱等方法,分别确定树脂功能基对钯吸附的络合比,及吸附过程功能基与钯发生了配位键合.选用混合洗脱剂可定量洗脱钯,并证明此法在实际应用中,可富集、回收钯。

The sorption capacity of N-methyl-2-thioimidazole resin for Pd(Ⅱ) is2.33m mol / g resin. The separation coefficient of Pd(Ⅱ) with Fe^(3+), Cu^(2+), Ni^(2+), andMn^(2+), the sorption rate constant of Pd(Ⅱ), and the constant of Freundlich sorptionwere determinted. The formation of coordination bond between the functional groupand Pd(Ⅱ) was confirmed by IR spectra. The complex molar ratio of the functionalgroup of the resin and Pd(Ⅱ) was determined by using chemical method. The Pd(Ⅱ)adsorbed on the resin can be eluted by a mixed eluent quantitatively. The separation ofPd(Ⅱ) and Pt(Ⅳ), the Preconcentration and recovery of Pd(Ⅱ) have been studied.