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Removal of Methylene Blue from Wastewater by Adsorption onto ZnCl 2 Activated Corn Husk Carbon Equilibrium Studies

2013; Hindawi Publishing Corporation; Volume: 2013; Issue: 1 Linguagem: Inglês

10.1155/2013/383985

2090-9063

Maryam Khodaie, Nahid Ghasemi, Babak Moradi, Mohsen Rahimi,

Nanomaterials for catalytic reactions

The removal of methylene blue by activated carbon of corn husk by ZnCl 2 activation (CHAC Z ) was investigated in the present study. Adsorption studies were performed by batch experiments. The effect of pH, initial dye concentration, adsorbent dose, the particle size of CHAC Z , agitation speed, temperature, and contact time was explored. The equilibrium adsorption data were analyzed using two widely applied isotherms: Langmuir, Freundlich. Best fits were found to be Freundlich isotherm. Langmuir adsorption capacity ( Q m ) in 298, 308, and 318 K is 462.96, 546.45, and 662.25 mgg −1 . The amount of R L indicates that CHAC Z has a favorable adsorption. Maximum MB removal was observed at pH 4.0. The results indicate that CHAC Z is an efficient adsorbent for removing dye from wastewater.