凹凸棒石粘土的改性方法研究现状

凹凸棒石独特的纤维状或棒状晶体形态和层链状晶体结构使其具有很大的比表面积,因而具有特殊的物理化学性质,主要包括吸附性、离子交换、流变性、催化性和可塑性等.但天然凹凸棒石粘土由于产地和组成不同而含有较多的杂质,严重影响凹凸棒石粘土的良好性能.经研究发现用提纯的方法对凹凸棒石改性可以除去其通道中的杂质,增加其比表面积,从而提高了吸附和离子交换性能；用热活化、酸化、碱化、有机改性、无机改性、混合法对原凹凸棒石进行改性可以使其疏松多孔,比表面积增加,吸附性能也随之提高,因而对其改性有较高的社会效益和经济效益.

Research on the Modification of Attapulgite Clay

Attapulgite unique crystal form fibrous or rod-like crystal structure of chain and layer it with large surface area,which has a special physical and chemical properties,including adsorption,ion exchange,rheology,catalysis and plasticity.However,because of natural attapulgite different origin and composition contain more impurities seriously affect the good performance of attapulgite.The study found that using the method of purification can be modified attapulgite remove impurities in the channel to increase its surface area,thereby increasing the adsorption and ion exchange properties;with heat-activated,acid,alkaline,organic modifier,modified inorganic,attapulgite modified the original hybrid method can make it porous,surface area increases,the adsorption performance will be improved,and thus modified their higher social and economic benefits.