摘要
研究了^(134)Cs在沸石中的吸附与迁移行为.用间歇法测定了^(134)Cs(作为^(137)Cs的示踪剂)在斜发沸石和丝光沸石等4组地质样品上的吸附比(R_d);研究了接触时间、沸石颗粒度、固液比、pH值和核素浓度对吸附比的影响,测定了吸附等温线和铯的吸附容量.用柱实验法研究了^(134)Cs在沸石柱中的吸附与迁移行为,测定了^(134)Cs在柱中的迁移分布.结果表明,沸石对Cs的吸附能力很强,对Cs而言,沸石是核废物处置的很好的回填材料.
This paper deals with the behavior of sorption and migration of 137 Cs on mordenite and clinoptilolite. The sorption ratios (Rd) of 137Cs (134Cs used as a tracer) on mordenite and clinop-tilolite were determined by batch technique. The effects of contact time, particle size of rock samples, solid - liquid ratios, pH values of simulated groundwater and concentration of Cesium in simulated groundwater on sorption ratios of Cs were investigated. The sorption isotherm and saturated sorption capacity of Cs were determined. The behavior of sorption and migration of Cs in clinoptilolite column were studied. The results show that sorption abilities of mordenite and clinoptilolite for Cs are very strong, and the Rd of Cs was 9 × 103 - 1 × 104 ml/g. The migration velocity of Cs in clinoptilolite column was very small (about 3.1 × 10 -2 m/a). So that, mordenite and clinoptilolite are very good backfill materials for Cs in nuclear waste disposal.
出处
《核科学与工程》
CSCD
北大核心
1994年第1期72-77,7-8,共6页
Nuclear Science and Engineering
关键词
吸附
迁移
放射性废物
铯
沸石
sorption migration radioactive cesium mordenite clinoptilolite
