摘要
吸附剂对水体中1 37Cs的吸附随着时间延长而增加 ,约 3h后吸附达到平衡 ,不同吸附剂有不同的饱和吸附率 ;沸石、分子筛和蒙脱石是1 37Cs的强烈吸附剂 ,而青紫泥、小粉土和红壤则是廉价、实用的净化剂 ;矿物经活化处理后可提高对1 37Cs的吸附能力 ,其吸附率与粒径之间的关系呈幂回归形式 ,选择适当粒径的矿物可达到理想的吸附效果 ;由于拮抗作用 ,K离子可抑制吸附剂对水体中1 37Cs的吸附 ;1 37Cs在土壤中不易移动 ,0～ 5cm表土层中几乎集中了施入量的 99%以上。
The 137 Cs adsorption rate by adsorbents in the water increased with the time and it reached balance after 3h. The saturate values of adsorption rate were different with various adsorbents tested. Among them, zeolite,molecular sieve and montmorillonite were strong adsorbents to 137 Cs,however, farinose clay, sandy loam 10cm and clay loam 10cm were cheap and available purification agents for 137 Cs. The activation treatment improved adsorption ability of minerals to 137 Cs. Threre was a power regression between the mineral size and the adsorption rate. Selecting suitable size might obtain an ideal effect of adsorption. Potassium ion inhibited the adsorption to 137 Cs in the water body by adsorbents because of antagonism. The migration of 137 Cs was very slow in the soil and 99% of 137 Cs was concentrated in the surface soil(0～5cm).
出处
《核农学报》
CAS
CSCD
2000年第4期234-240,共7页
Journal of Nuclear Agricultural Sciences
基金
浙江省科委资助!项目 (96 110 30 84)
