Adsorption to Acid Red 14 in Wastewater by ZnCr Bimetal Layered Materials

作者：Liu Feng-Xian; Shao Meng-Meng; Xia Sheng-Jie; Ni Zhe-Ming^*

来源：Chinese Journal of Inorganic Chemistry, 2015, 31(7): 1342-1350.

DOI：10.11862/CJIC.2015.187

• ZnCr layered double hydroxides
• adsorption
• acid red 14

Zinc chrome bimetal layered materials (ZnxCr-LDHs, x=2, 3, 4) were successfully synthesized by the coprecipitation method and different factors on the adsorption of AR14 were also investigated. The characterization of XRD, ICP, FTIR and BET revealed that the crystal structures of ZnxCr-LDHs (x=2, 3, 4) were very good and stable, it had the mesoporous structure. Experimental results indicated that the optimum sorbent was Zn3Cr-LDHs with a specific surface area of 101 m(2) . g(-1), the maximum adsorption capacity for AR14 was 484.63 mg . g(-1). Moreover, lower pH value and higher temperature were favorable to the removal of AR14. Adsorption isotherms and kinetics showed that the adsorption process could be well fitted with the pseudosecond-order kinetic and Freundlich equation. Based on the analysis of Materials Studio 5.5 simulation, the adsorption menchanism was that AR14 were adsorbed on the surface of Zn3Cr-LDHs, the -SO3- group was the reaction point.

• 出版日期2015-7-10
• 单位浙江工业大学