Chitin as biosorbent for phenol removal from aqueous solution: equilibrium, kinetic and themodynamic studies
- G. Pigatto
- A. Lodi
- E. Finocchio
- M.S.A. Palma
- A. Converti
DOIAbstract
Phenol removal from aqueous solution was studied employing chitin as low cost biosorbent. Initial biosorption tests carried out in the pH range 2-10 pointed out an optimum pH of 2. Temperature and initial phenol concentration were then varied in the ranges 15 <T<50\ub0C and 10.4 <C0<90.8 mg L-1, respectively. The good applicability of Langmuir, Freundlich and Temkin models (R2 = 0.990-0.993) to describe equilibrium isotherms suggested an intermediate mono- /multilayer biosorption mechanism along with a semi-homogeneous arquitecture of biosorbent surface. Biosorption capacity progressively increased from 3.56 to 12.7 mg g-1 when starting phenol concentration was raised from 10.4 to 90.8 mg L-1, and the related sorption kinetics was investiga...
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