核化学与放射化学2025，Vol.47Issue(1)：50-57,8.DOI:10.7538/hhx.2025.47.01.0050
离子交换法制备氘代阳离子交换树脂
Preparation of Deuterated Cation Exchange Resin by Ion Exchange
摘要
Abstract
During the operation of the spallation neutron source,heavy water used as a coolant can introduce impurities.Direct purification of heavy water using conventional ion exchange resins can lead to the displacement of H+/OH-,thereby reducing the purity of heavy water.Therefore,the resin needs to be deuterated.This study focused on Na-form cation exchange resins and utilized the ion exchange method to prepare deuterated resins.The results indicate that the Langmuir isotherm effectively can describe the equilibrium data for the adsorption of D+on Na-form cation exchange resins.Analysis of thermodynamic parameters,including Gibbs free energy(ΔG),enthalpy(ΔH),and entropy(ΔS),reveals that the adsorption process is spontaneous and that the adsorption capacity of the resin increases with increasing temperature.ICP-OES analysis further indicates that a deuteration rate of 98％is achieved when the DC1 concentration exceeds 0.8 mol/L.Additionally,the adsorption kinetics of D+on Na-form cation exchange resins at various temperatures aligns well with the pseudo-second-order kinetic model,with adsorption rates increasing as the temperature rises.In fixed-bed experiments,an elevation in bed temperature results in a shortened mass transfer zone,facilitating faster saturation of the resin bed.Consequently,333 K is identified as an optimal preparation temperature for these materials.The performance of D-form cation exchange resin is not significantly different from that of H-form cation exchange resin.This study can provide some references for the preparation process of deuterated cation exchange resin.关键词
阳离子交换树脂/氘代率/吸附/穿透曲线Key words
cation exchange resin/deuteration rate/adsorption/breakthrough curves分类
能源科技引用本文复制引用
罗承扬,宋江锋,周琳森,陈长安,何宁,喻彬,杨剑波..离子交换法制备氘代阳离子交换树脂[J].核化学与放射化学,2025,47(1):50-57,8.基金项目
四川省创新区域合作项目(2023YFQ0107) （2023YFQ0107）
松山湖科学城散裂中子源开放基金项目(KFKT2023A04) （KFKT2023A04）
