^(137)Cs在灌耕灰棕漠土腐殖质各组分的分布  

SIMULATION STUDY ON ^(137)Cs DISTRIBUTION IN THE EACH COMPONENT OF IRRIGATION-FARMED GRAY - BROWN DESERT SOIL HUMUS

作　　者：艾克拜尔.伊拉洪 贾宏涛[1] 吐尔逊.吐尔洪 A.I.Karpuhin S.P.Torshin 

机构地区：[1]新疆农业大学草业与环境科学学院,新疆乌鲁木齐830052 [2]俄罗斯国立农业大学土壤农业化学及生态学系,俄罗斯莫斯科127550

出　　处：《核农学报》2011年第2期325-330,共6页Journal of Nuclear Agricultural Sciences

基　　金：国家自然科学基金(40861010);人事部留学回国人员择优项目(2005-129)

摘　　要：研究了新疆灌耕灰棕漠土腐殖质组分及其性质,并利用凝胶过滤法室内研究了外源137 Cs与土壤腐殖质各组分的结合性能。结果表明:在研究条件下1,37 Cs与粘土矿物的结合率最高,占总量的78.37%;21.63%的137Cs积累于腐殖质中,其中与胡敏酸、富啡酸、胡敏素结合的分别为5.78%、6.60%和9.25%。腐植酸与137Cs结合形成分子量较小的4个复合体,即他们的质均分子量>700,392,168和<100。但胡敏酸与金属离子137Cs不仅结合成稳定的有机无机复合体,而且可以形成稳定性更高的腐殖质金属离子配合物。The components and characters of humus in irrigation-farmed gray-brown desert soil were studied and gel filtration method is used at indoor experiment to study the bond properties of the foreign source 137Cs and soil humus’ components.Results show that the bonding rate of 137Cs was the highest in clay mineral,78.37% of total.21.63% of 137 Cs was accumulated in the humus,the bonding rate of 137 Cs with humic acid,fulvic acid,and humin were 5.78%,6.60% and 9.25%,respectively.The humic acid and 137Cs formed four low weight complex moleculars,their average molecular weights are 700,392,168 and 100.But humic acid and 137Cs can not only be bonded into the stable organic-inorganic composite,but also into humus-metal ion complex with very high stability.

关 键 词：137Cs 灌耕灰棕漠土 腐殖质组分 质均分子量 

分 类 号：S153.622[农业科学—土壤学]