Adsorption of Direct Green B on mixed hydroxy-Fe-Al pillared montmorillonite with large basal spacing

Article type: Research Article

Authors: ZENG, Xiu-qiong | LIU, Wei-ping

Affiliations: Department of Chemistry, Zhejiang University, Hangzhou 310028, China | Institute of Environmental Science, Zhejiang University, Hangzhou 310028, China

Note: [] Corresponding author. E-mail: xiuqiong_zeng@yahoo.com.cn

Abstract: Through cation-exchanging of montmorillonite, mixed hydroxy Fe-Al-pillared montmorillonites with large basal spacing were synthesized. The application of these mixed hydroxy Fe-Al-pillared montmorillonites as adsorbents in the areas of environmental protection and pollution control was investigated. Adsorption of Direct Green B, an organic dye, on OH–Fe–, OH–Al–, OH–Fe–Al– pillared montmorillonites was studied. Results showed that these pillared montmorillonites had much better adsorption properties than traditional Na-organo-montmorillonite. It was also found that pH of the solutions had great effect on the performance of these hydroxy-metal pillared montmorillonites in treating the wastewater containing Direct Green B.

Keywords: hydroxy-Al-Fe, montmorillonite, preparation, characterization, Direct Green B, adsorption

Journal: Journal of Environmental Sciences, vol. 17, no. 1, pp. 159-162, 2005