Removal of Acid Red G Dye Using Raw Bentonite-Cationic Starch Composite

Abstract:

The adsorption behavior of acid red G from aqueous solution onto raw bentonite (RB) and raw bentonite/ cationic starch (RB/CS) composite samples was investigated as a function of parameters such as contact time, salt concentration, initial dye concentration and temperature. The results showed that an amount of 0.12g of RB/CS composite could removal more than 90% of dye from 150ml of 100 mg L^-1 acid red G solution with a contact time of 60 min, at room temperature and no salt addition. The adsorption rate was fast and more than half of the adsorbed acid red G was removed in the first 10 min for RB and 5 min for RB/CS at room temperature.(C_o=100 mg L^-1)The results also indicated that the RB/CS composite had a shorter equilibrium time, higher color removal and stronger adsorption properties of acid red G than RB. In summary, the results suggests that RB/CS can be employed as a kind of low-cost material for the removal of acid red G from aqueous solution.

• Periodical: Advanced Materials Research (Volumes 821-822)
• Pages: 497-501
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.821-822.497
• Online since: September 2013
• Authors: Hua Ling He, Zhi Cai Yu, Peng Liang
• Keywords: Acid Red G Dye, Adsorption, Cationic Starch, Raw Bentonite, RB/CS Composite

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