摘要
通过以2∶1型膨润土、1∶1型高岭土为代表的粘土矿物吸附金属元素Cd和以醋酸、草酸和柠檬酸为代表的有机酸对粘土矿物吸附金属Cd的解吸作用研究,得出结果:粘土矿物对镉离子的吸附率随Cd浓度增大而下降;2∶1型膨润土的吸附能力大于1∶1型高岭土;三种弱酸对粘土矿物吸附的镉离子具有一定的解吸附能力,其中柠檬酸>草酸>醋酸,且对膨润土的解吸效率低于对高岭土的解吸效率。
Through analysis of the adsorption of metallic element cadmic by clay minerals such as 2:1 bentonite and 1:1 kaolin, and the desorption of the metallic element cadmic adsorbed by clay mineral with monoacid, binary acid and ternary acid such as acetic acid, oxalic acid and citric acid, it is concluded that the quantity of cadmic absorbed by the clay mineral decreases as the concentration of cadmic increases, the desorption ability of 2:1 type bentonite is greater than the 1:1 type kaolin, the three kinds of acids have desorption ability to some extent, the desorption ability of citric acid > oxalic acid > acetic acid and the desorption efficiency of the acid for bentonite-adsorbed cadmic is inferior to that for kaolin.
出处
《安徽地质》
2004年第4期282-284,共3页
Geology of Anhui
关键词
粘土矿物
有机酸
吸附
解吸
clay mineral
organic acid
adsorption
desorption
