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Journal of Applied Sciences
  Year: 2014 | Volume: 14 | Issue: 6 | Page No.: 537-541
DOI: 10.3923/jas.2014.537.541
 
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Acidically Prepared Rice Husk Carbon for Adsorption of Zn(II) from Aqueous Solution

Taimur Khan, Mohamed Hasnain Isa, Malay Chaudhuri and Muhammad Raza Ul Mustafa

Abstract:
The aim of the study was to prepare potentially cheaper carbon for the adsorptive removal of Zinc [Zn(II)] from aqueous solution. The adsorption capacity of the prepared carbon to remove Zn(II) from aqueous solution was tested and adsorption mechanism was investigated. Rice husk carbon was prepared by acidic treatment of rice husk. The Acidically Prepared Rice Husk Carbon (APRHC) was characterised in terms of surface area, micropore area, micropore volume, average pore diameter and surface morphology. Adsorption of Zn(II) by APRHC was examined. The influence of operating parameters, namely, pH, initial concentration, contact time and adsorbent dose on adsorption of Zn(II) by the APRHC was evaluated. Batch adsorption tests showed that extent of Zn(II) adsorption depended on initial concentration, contact time and pH. Equilibrium adsorption was achieved in 60 min, while maximum Zn(II) adsorption occurred at pH 3. Langmuir and Freundlich isotherms were studied and the equilibrium adsorption data was found to fit well with the Freundlich isotherm model. Langmuir constants Q° and b were 44 and 0.06 and Freundlich constants Kf and 1/n were 7.31 and 0.38, respectively. Adsorption of Zn(II) by APRHC followed pseudo-second-order kinetics. Being a low-cost carbon, APRHC has potential to be used for the adsorption of Zn(II) from aqueous solution and wastewater in developing countries.
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How to cite this article:

Taimur Khan, Mohamed Hasnain Isa, Malay Chaudhuri and Muhammad Raza Ul Mustafa, 2014. Acidically Prepared Rice Husk Carbon for Adsorption of Zn(II) from Aqueous Solution. Journal of Applied Sciences, 14: 537-541.

DOI: 10.3923/jas.2014.537.541

URL: https://scialert.net/abstract/?doi=jas.2014.537.541

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