核化学与放射化学2018，Vol.40Issue(2)：112-120,9.DOI:10.7538/hhx.2017.YX.2017016
125I-在高庙子膨润土上的吸附行为
Sorption Behavior of 125I- on Gaomiaozi Bentonite
摘要
Abstract
The sorption behavior of 125I- on Gaomiaozi bentonite was studied as a function of pH,ionic strength,temperature and solid-to-liquid ratio with the method of batch sorption experiments.125I- sorption on Gaomiaozi bentonite is shown to be sensitive to pH and ionic strength.The sorption of 125 I- is negligibly small under neutral and alkaline conditions, while with the decrease of pH,the sorption increases rapidly until the maximum sorption appeares at pH=2.0,and with the pH decreases,the sorption rapidly decreases.It is found that the maximum equilibrium sorption constant of 125I- on bentonite appeares under the condition of pH=2.0 at the background electrolyte concentration of 0.10 mol/L NaClO4, which is approximately 92 mL/g at T=298 K.The pHPZCof bentonite is about 9.5 and the pHPZCof montmorillonite is about 10.5 from the results of acid-base titration.Temperature has little effect on the sorption of iodine on Gaomiaozi bentonite and Freundlich isotherm model is more suitable to describe sorption of iodine on Gaomiaozi bentonite at different temperatures.关键词
高庙子膨润土/125I-/吸附Key words
Gaomiaozi bentonite/125 I-/sorption分类
能源科技引用本文复制引用
齐立也,杨小雨,王春丽,周万强,刘春立..125I-在高庙子膨润土上的吸附行为[J].核化学与放射化学,2018,40(2):112-120,9.基金项目
高放射性废物处置特别基金(2007-840,2012-851) （2007-840,2012-851）
国家自然科学基金(NSFC,No.U1530112,11475008,11075006,91026010) （NSFC,No.U1530112,11475008,11075006,91026010）
