Facile Synthesis of Dye Waste-Calcium Fluoride Hybrid Absorbent and Application to Dye Wastewater Treatment

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A new hybrid material of CaF2/ABB6B (CFAB) was developed by the template-free hybridization of acid brilliant blue 6B (ABB6B) with CaF2. The composition and structure of the material were determined and characterized. In contrast to conventional sorbents, the hybrid material contains lots of negative charges as the basis of specific adsorption. The efficient removal of cationic dyes of victoria blue B (VBB), ethyl violet (EV) and basic brilliant blue BO (BBBO) indicates that it has an improved adsorption capacity and selectivity with a short removal time less than 5 min; while the hybrid sorbents fit the Langmuir isotherm model. Instead of using ABB6B reagent, an ABB6B-producing wastewater was reused to prepare the cost-effective sorbent, and the equilibrium adsorption capacities of which reached 46.29 mg•g-1, 24.81 mg•g-1 and 30.40 mg•g-1 for VBB, EV and BBBO, respectively. The sorbent was then used to treat the actual wastewater samples with satisfactory results of over 96% decolonization and 82% COD-decreasing. This work has developed a simple and eco-friendly method for synthesizing a practical and efficient sorbent. The results shown that the hybrid adsorption material has ideal decolorization and COD lowering efficiency and a good application prospect in dye industrial wastewater treatment.

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2338-2345

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January 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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