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Research Journal of Environmental Sciences
  Year: 2011 | Volume: 5 | Issue: 9 | Page No.: 741-751
DOI: 10.3923/rjes.2011.741.751
 
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Application of Various Activated Carbons in the Adsorptive Removal of Methylene Blue from Aqueous Solution
Monal Dutta, Subhankar Mishra, Mradul Kaushik and Jayanta Kumar Basu

Abstract:
Adsorption of methylene blue had been done by using various activated carbons. The char derived from Acacia auriculiformis scrap wood was activated by using hydrochloric, phosphoric, sulphuric and nitric acid. The adsorption capacity of the prepared carbon was further compared with the adsorption capacity of the carbon prepared by microwave activation and it was found that the activated carbon developed by phosphoric acid activation had the highest adsorption capacity towards methylene blue. The characterization of the adsorbent was done through surface area analyzer and scanning electron microscopy. A typical honeycomb pattern with pores of varying size were observed on the surface of the scrap wood char whereas, the size of the existing micropores were increased when they were activated in presence of nitric acid. Besides, the roughness of the existing pore walls increased upto a certain extent when it was activated by using a domestic micro oven. The batch adsorption study of methylene blue was carried out by varying initial dye concentrations, agitation speed, adsorbent particle size and temperatures. The adsorption process was found to be exothermic in nature. The maximum removal of methylene blue was achieved at an agitation speed of 2000 rpm and a particle size of -100+250 mesh. The monolayer adsorption capacity of the phosphoric acid activated carbon was found to be 250 mg g-1. The adsorption capacity of the prepared adsorbent was compared different commercially available adsorbents and the present adsorbent was found to have maximum removal efficiency for the basic dye methylene blue.
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How to cite this article:

Monal Dutta, Subhankar Mishra, Mradul Kaushik and Jayanta Kumar Basu, 2011. Application of Various Activated Carbons in the Adsorptive Removal of Methylene Blue from Aqueous Solution. Research Journal of Environmental Sciences, 5: 741-751.

DOI: 10.3923/rjes.2011.741.751

URL: https://scialert.net/abstract/?doi=rjes.2011.741.751

 
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