摘要
采用间歇法研究了合成沸石(ZF)在不同环境条件下对Sr2+的吸附性能,并对吸附Sr2+后的ZF用X-衍射(XRD)表征和分析,为评价中低放核废物处置效果提供参考依据。实验表明:ZF对Sr2+的吸附性能比较好,ZF对Sr2+的吸附平衡时间约在5～14 d。Sr2+溶液的浓度对ZF的吸附性能影响比较大,其次是介质、溶液的温度和溶液的pH值。ZF对Sr2+的平衡吸附量随Sr2+溶液浓度的升高而增大,但平衡吸附率和平衡吸附比随着溶液浓度的增大而降低。pH值增大时,ZF对Sr2+的吸附性能也提高。由于介质溶液中离子种类、浓度以及其他成分不同,所以ZF对Sr2+的吸附能力有差异。温度升高时,ZF对Sr2+吸附性能提高。从总体上说,在溶液中Sr2+浓度为0.005 mol/L时,ZF对Sr2+吸附性能受溶液的pH值、介质和溶液的温度影响不大,吸附Sr2+后ZF的晶胞参数是减小的。
Sr2＋ adsorption capacity of synthetic zeolite（ZF） are studied with the intermittence method,and ZF adsorbed the Sr2＋ is characterized and analyzed by XRD,as a reference for the evaluation of the disposal effectiveness of low and medium radwastes.The results show that Sr2＋ adsorption capacity of ZF is good,and the equilibrium time for ZF to adsorb Sr2＋ is in range of 5～14 days.Sr2＋ concentration has the greatest effect on ZF adsorption capacity,and the medium,temperature and pH value of the solution also have effect on ZF adsorption capacity.With the augment of Sr2＋ concentration,the Sr2＋ equilibrium adsorption quantity of ZF increases,but the equilibrium adsorption rate and equilibrium adsorption ratio decreases.Sr2＋ adsorption capacity of ZF improves with the augment of pH value.Sr2＋ adsorption capacity of ZF is complicate and varies with the different ion,concentration and other components in the medium solution.Sr2＋ adsorption capacity of ZF increases with the augment of temperature.As a whole,when Sr2＋ concentration in the solution is 0.005mol/L,the pH value of the solution,and the temperature of medium and solution have less effect on the Sr2＋ adsorption capacity of ZF,and the unit cell parameter of ZF adsorbed Sr2＋ decreases.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2010年第2期89-93,共5页
Nuclear Power Engineering
基金
国家自然科学基金资助(10376028)
关键词
合成沸石
Sr2+
吸附性能
表征
Synthetic zeolite
Sr2＋
Sorptive capacity
Characterization
