Vol. 3 (3) : May-June 2012 issue
Green Farming Vol. 3 (3) : 319-322 (May-June, 2012)
Studies on removal of chromium from waste water by adsorption using low cost agricultural biomass as adsorbents
A.Y. TALOKAR1
Deptt. of Farm Structures, College of Agriculture Engg. & Tech., Dr. P.D. Krishi Vidyapeeth, Akola - 444 104 (M.S.)
Designation : 1Assistant Professor (ajay_talokar@rediffmail.com)
Subject : Agronomy and Crop Production
Paper No. : P-0075
Total Pages : 4
Received : 23 December 2011
Revised accepted : 18 May 2012
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Citation :
A.Y. TALOKAR. 2012. Studies on removal of chromium from waste water by adsorption using low cost agricultural biomass as adsorbents. Green Farming Vol. 3 (3) : 319-322 ; May-June, 2012
ABSTRACT
The study was aimed at efficiency evaluation of non-conventional low cost adsorbents such as fly ash powder, bagasse, w. straw dust, SD, and coconut coir as compared to the powder activated carbon for the removal of chromium from aqueous solution. The efficiency of the adsorbents for the removal of chromium was investigated. The efficiency of adsorbent used is found in the order of PAC>Bagasse>FA>SD>WSD>Coconut coir. The effect of chromium solution pH, contact time ,adsorbent dosage, initial chromium concentration and adsorbent mesh size on adsorption were studied in a batch experiment. Fly ash, bagasse, W.S.D, SD, & coconut coir were the most active at pH-6 , which is closer to pH of chromium bearing industrial waste as compared to the pH 2.0 of PAC. The equilibrium data for the adsorption of chromium were analysed in the light of Langmuir and Freundlich isotherm models. The ultimate adsorption capacity for the adsorbents PAC, bagasse, FA, S.D., W.S.D & coconut coir found out are 4.97 mg/gm, 4.91mg/gm, 4.90mg/gm, 4.89 mg/gm, 4.77mg/gm and 4.56 mg/gm respectively by column studies.
Key words :
Activated carbon, adsorbent, adsorption, Cr(VI), Langmuir and Freundlich isotherm, waste water treatment.
