Preparation Of Organic-intercalation Montmorillonite Composites And Their Adsorption Behavior In Wastewater Containing Cr(Ⅵ) Ions

This subject is launched to enlarge the appliance of nonmetallic minerals in environmental protection. Up to now, the study of appliance of intercalated montmorillonite in waste water treatment is mostly about the adsorption of organic pollutants on organic-intercalation montmorillonite composites. Little study is done about the adsorption of inorganic pollutants and especially hazardous Cr(VI). In this thesis , The preparation of organic-compound-intercalated montmorillonite and it's adsorption behavior mechanism of Cr(VI) in waste water are investigated.Organic-compound-intercalated montmorillonite is prepared. The results show that the amount of the intercalated agent affects the interplanar spacing of organic-compound-intercalated montmorillonite and the adsorption effects of Cr(VI) on organic-compound-intercalated montmorillonite ,which are obviously higher than that of original montmorillonite or sodium montmorillonite. The optimum amount of the intercalated agent is 120%CEC. The interplanar spacing of organic-compound-intercalated montmorillonite(NY and GY) is respectively 20.4536A and 18.1821A when the amount of the intercalated agent is 120%CEC.Adsorption rate of Cr( VI) on organic-compound-intercalated montmorillonite is investigated. The results show that the adsorption rate is affected by pFU reacting time, inventory of adsorbents and original consistency of waste water. The optimum PH is 3, adsorption equilibrium time of is 60 min , The adsorption rate of Cr(VI) is increased when the inventory of adsorbent is increased and reduced when original consistency of waste water is increased.The adsorption rate of Cr(VI) on organic-compound-intercalated montmorillonite (NY and GY) in 4mg/L Cr(VI) waste water is up to 98% and 69% when the inventory of adsorbents is 2g/100mL.