CAJ | 학술논문

用HDEHP萃取法从高放废液中提取了~(90)Sr,对~(137)Cs的去污因子约为800.以~(90)Sr-~(90)Y为示踪剂,在不同pH条件下对~(90)Y在聚丙烯、聚乙烯、玻璃等材料管壁上的吸附进行了研究.结果表明,在pH=0～10范围内,3种材料的管壁吸附~(90)Y的变化趋势基本一致.当pH<3时,~(90)Y在3种材料上基本不吸附;当pH>3时,~(90)Y在3种材料上均有较大的吸附,且在玻璃上的吸附远大于在聚丙烯和聚乙烯上的吸附;对于聚丙烯和聚乙烯2种材料,当pH<7时,~(90)Y在聚丙烯上的吸附大于在聚乙烯上的;pH>7时,情况相反.根据实验结果,在~(90)Sr-~(90)Y的实验中,应尽量选用聚丙烯或聚乙烯作为容器,且溶液的pH值应小于3.
용HDEHP췌취법종고방폐액중제취료~(90)Sr,대~(137)Cs적거오인자약위800.이~(90)Sr-~(90)Y위시종제,재불동pH조건하대~(90)Y재취병희、취을희、파리등재료관벽상적흡부진행료연구.결과표명,재pH=0～10범위내,3충재료적관벽흡부~(90)Y적변화추세기본일치.당pH<3시,~(90)Y재3충재료상기본불흡부;당pH>3시,~(90)Y재3충재료상균유교대적흡부,차재파리상적흡부원대우재취병희화취을희상적흡부;대우취병희화취을희2충재료,당pH<7시,~(90)Y재취병희상적흡부대우재취을희상적;pH>7시,정황상반.근거실험결과,재~(90)Sr-~(90)Y적실험중,응진량선용취병희혹취을희작위용기,차용액적pH치응소우3.
~(90)Sr was obtained by HDEHP extraction from high level liquid waste. The decontamination factor for ~(137)Cs is about 800. The adsorption of ~(90)Y on polypropylene, polyethylene and glass was studied as a function of pH. For three materials, the effect patterns of pH on the adsorption of ~(90)Y are similar. The adsorption on the three materials are so small that can be negligible at pH<3. Glass has a strong adsorption ability compared with polyethylene and polypropylene. The adsorption percentage for polypropylene is higher than for polyethylene at pH<7 and the contrary is the case at pH>7. Therefore, in order to avoid the adsorption of ~(90)Y, it is better to choose polyethylene or polypropylene vessel and keep the pH of solution below 3 in the experiment related to ~(90)Sr-~(90)Y.