Removal of Basic Dye from Aqueous Medium Using Activated Carbon from Erythrina Brucei, Arundinaria Alpina and Manihot Esculenta

Abstract

This work deals with the preparation of activated carbon (AC) from Korch (Erythrina brucei) sawdust (EB), Bamboo (Arundinaria alpina) sawdust (AA), and Cassava peel (Manihot esculenta) powder (ME) to remove methylene blue (MB) from aqueous solution. The effect of temperature, chemical impregnation (H₃PO₄, ZnCl₂, KOH and H₂SO₄) were done. The optimum temperature used to prepare activated carbon of EB, AA and ME were700 , 400  and 600  respectively. High surface area AC was obtained by chemical activation of biomaterial with H₃PO₄. The effect of various process parameters like pH, contact time, adsorbent dose on the efficiency MB removal was investigated. The optimum pH value and contact time for AC of EB, AA and ME was determined as 6, 5, 4 and 40, 50, 60 min respectively. The optimum adsorbent dose of EB, AA and ME were determined 0.04, 0.06 and 0.12g respectively in 25ml of solution. Thermodynamic analysis asserted endothermic and spontaneous nature of the system.  Equilibrium data were represented better by Langmuir model than Freundlich which describes monolayer adsorption. The linear regression analysis of kinetic data confirmed that Pseudo-second order rate expression.

Keywords: activated carbon, E. brucei, A. alpina, M. esculenta, methylene blue.

DOI: 10.7176/FSQM/86-03

Publication date: April 30^th 2019