Preparation of Highly Effective Hybrid Adsorbent by Anionic Dye Wastewater and Its Use in Cationic Dye Wastewater

AbstractA new kind of acid red 138 (AR138)–calcium fluoride nanosized CaF2/AR138 hybrid adsorbent (CFAR) was prepared. The microstructure of the hybrid adsorbent was characterized and its adsorption capacity to two cationic dyes, methyl blue (MB) and ethyl violet (EV), from aqueous solutions was examined using a batch sorption technique. The adsorption behavior of the MB and EV on CFAR is in good agreement with the Langmiur isotherms. The maximum adsorption capacity (Qm) of CFAR for MB and EV are 370.4 and 131.6  mg/g, respectively. The effects of pH, ionic strength, temperature, and time have been investigated in detail. The CFAR adsorbent was used to treat two dye wastewaters with satisfactory results. In synthesis of the materials, all of the reactants are easily available and harmless to environment as well because AR138 may use a concentrated AR138-producing wastewater instead. Therefore, this paper has developed a simple, eco-friendly and waste treat waste method for large-scale production of a cost...