Preparation And Application Of Organic Pillared Montmorillonite

Montmorillonite is a kind of silicate with the formation of layers. Each unit cell is made up of two (Si-O₄) tetrahedral layers and a (Al-O₆) tetrahedral layer . Al(â…¢) from (Al-O₆) tetrahedral layer can be replaced by Mg( â…¡ ), Fe(â…¡) , Zn(â…¡) , Li(â… ) cations, Si(â…£) from (Si-O₄) tetrahedral layers can be replaced by Al(â…¢) and Fe(â…¢).because of loss of positive charge, montmorillonite has a stronger ability of adsorption and cation—exchange. From the view of that , organic substance is used to pillar the montmorillonite .Pillared Interlayered Montmorillonite is a new type of material ,in which layers are propped up with pillared interlayered agent .It is characterized by big aperture and great specific surface area .This paper produces organic Pillared Interlayered Montmorillonite by the way of using CTMAB as pillared interlayered agent ;And studies adsorptive properties of the purified montmorillonite and organic pillared and organic pillared interlayered montmorillonite on Cr(â…¢) on the conditions of different quantity , adsorptive time and pH and finds out the proper condition . The results indicate on the same condition the adsorptive effictiveness of organic pillared interlayered montmorillonite on Cr(â…¢) is better than that of purified montmorillonite ,and it is in comfirmity with the the Langmuir adsorption isotherms at the same time; Using Ponceau 4R imitate the dyestuff wasterwater ,the suitable conditions and adsorption isotherms of adsorbing dyestuff wasterwater by organic pillared interlayered montmorillonite are studied . The results show that the interlayer spacing of pillared montmorillonite increases , and the adsorbing and decolorizing capacities strengthen . The suitable conditions of the quantity of montmorillonite ,treatment time and the pH are studied . The decoloration could be stated by an expression as Freundlich model.