中国生物工程杂志

Orange peel was used as low-cost adsorbent in binding of Methylene Blue. The effects of equilibrium time, pH, dye concentration have been studied. Carboxyl, amine and phosphonate functional groups were present in the orange peel. The equilibrium time was 1 hour, the maximum adsorption capacities of the orange peel was 370.3±31.0 mg/g at pH 10. The Langmuir and Freundlich isotherms were well fitted in this biosorption system. Results showed relatively higher rate constant and biosorption capacities. These adsorption performance indicate the orange peel as a potentially economical adsorbent for dye removal.