Sorption behavior of plutonium(IV) onto soils in the presence of humic acid
Sorption behavior of plutonium(IV) onto soils in the presence of humic acid
复制标题
腐殖酸存在下土壤对钚（IV）的吸附行为
DOI：
10.1080/00223131.2002.10875522
复制
发表时间：
2002
影响因子：
1.2
通讯作者：
H. Ogawa
中科院分区：
文献类型：
--
作者：
T. Tanaka;S. Nagao;Y. Sakamoto;H. Ogawa
腐殖酸对238 Pu吸附到地质介质上的影响，使用沿海的沙子，它不吸附腐殖酸，和安藤土壤，它吸附腐殖酸非常好，进行了检查相对于腐殖酸的分子大小。238 Pu在海岸沙中的表观吸附亲和力随腐殖酸浓度的增加而降低。对于红壤，当腐殖酸浓度达到几mg/dm ~ 3时，~（238）Pu的吸附亲和力最大。小于100，000道尔顿的腐殖酸部分与238 Pu络合和吸附有关，特别是30，000 - 100，000道尔顿的腐殖酸部分占主导地位。大多数238 Pu形成腐殖酸化合物，即使在低腐殖酸浓度区，由此产生的腐殖酸钚被认为是控制表观吸附亲合性的38 Pu。从以上结果可以看出，腐殖酸的特定分子大小控制着238 Pu的络合能力和表观吸附亲和力。
Influence of humic acid on the sorption of 238Pu onto geologic media using a coastal sand, which does not sorb humic acid, and an ando soil, which sorbs humic acid very well, was examined with respect to molecular sizes of humic acid. Apparent sorption affinity of 238Pu for the coastal sand decreased with increasing humic acid concentration. As to the ando soil, the sorption affinity of 238Pu became largest in the presence of several mg/dm3 of humic acid. The humic acid fraction smaller than 100,000 daltons relates to the complexation with 238Pu and the sorption onto the soils, particularly the humic acid fraction of 30,000-100,000 daltons was dominant. Most 238Pu formed humic compounds even in a low humic acid concentration region; resulting plutonium humates are considered to control the apparent sorption affinity of ~38Pu. It is concluded from above results that a specific molecular size of humic acid controls the complexation ability and the apparent sorption affinity of 238Pu.