Np在北山花岗岩裂隙填充物上的吸附行为  

Sorption of Np(Ⅴ) on Beishan Granite Fracture Filling Materials

作　　者：姜涛[1] 王波[1] 包良进[1] 周舵[1] 龙浩骑[1] 宋志鑫[1] 陈曦[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《原子能科学技术》2012年第B09期61-66,共6页Atomic Energy Science and Technology

摘　　要：采用批式实验法在低氧条件下研究Np(Ⅴ)在北山花岗岩裂隙填充物上的吸附行为,探讨地下水pH、CO23-、腐殖酸及裂隙填充物各组分等因素对吸附的影响。实验结果表明:裂隙填充物对Np(Ⅴ)有较强的吸附能力,吸附分配比Kd为843mL/g;Kd随pH先增大后减小,当有CO23-和腐殖酸存在时Kd减小;绿泥石和长石是北山花岗岩裂隙填充物吸附Np(Ⅴ)的主要贡献者。The sorption behaviors of Np（Ⅴ） on the granite fracture filling materials were studied by batch experiments under anaerobic in Beishan groundwater.The impact of pH of groundwater,CO2-3,humic acid and different components of granite fracture filling materials on sorption of Np（Ⅴ） was investigated.The results show that the granite fracture filling materials have strong capacity of Np（Ⅴ） adsorption.The value of Kd for Np（Ⅴ） sorption on the granite fracture filling materials is 843 mL/g.With the increase of pH,the value of Kd increases at first and then decreases.Kd of Np sorption on granite fracture filling materials in the presence of CO2-3 and humic acid decreases.The chlorite and feldspar are major contributors to the sorption of Np（Ⅴ） on Beishan granite fracture filling materials.

关 键 词：Np(Ⅴ) 低氧 裂隙填充物 吸附 

分 类 号：X131.3[环境科学与工程—环境科学]