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研究了改性累托石吸附去除溶液中的铀U(VI)。考察pH值、吸附剂投加量、吸附时间、初始U(VI)质量浓度对铀U(VI)去除效果的影响。实验结果表明,溶液中U(VI)质量浓度为10 mg/L;改性累托石投加量为10 g/L;溶液pH为5.0;吸附时间为360 min是实验最佳处理工艺条件。改性累托石对U(VI)的吸附量可达到35.5 mg/g,U(VI)去除率可达到98%。改性累托石吸附溶液中铀U(VI)的吸附规律较好的符合Freundlich吸附等温方程式,并且吸附动力学可用准二级动力学方程来描述。
Uranium (U) in the solution of modified rectorite was studied. The effects of pH value, adsorbent dosage, adsorption time and initial U (VI) concentration on U (VI) removal were investigated. The experimental results showed that the optimal concentration of U (VI) in the solution was 10 mg / L, the dosage of modified rectorite was 10 g / L, the pH of the solution was 5.0 and the adsorption time was 360 min. The modified rectorite adsorption amount of U (VI) can reach 35.5 mg / g, U (VI) removal rate can reach 98%. The adsorption law of uranium U (VI) in the modified rectorite adsorption solution is in good agreement with the Freundlich adsorption isotherm equation, and the adsorption kinetics can be described by pseudo second-order kinetic equation.