摘要：The effect of chemical pretreatment on copper (II) uptake capacity of heat inactivated Streptomyces fradiae biomass and the role of the surface chemistry of the biomass on biosorption behaviour were investigated. Treatment of the biosorbent with alkali chemicals, salts, acids and organic solvents showed varying effects on the removal efficiency of copper (II). Pretreatment of the biomass with sodium hydroxide and disodium salt of ethylenediaminetetraacetic acid significantly increased biosorption of copper (II) in comparison with the heat inactivated Streptomyces fradiae biomass. The maximum copper (II) uptake of pretreated Streptomyces fradiae biomass with sodium hydroxide was 44,17 mg/g at initial pH = 5,0. All treatments with acids decreased biosorption capacity of the biosorbent. The surface properties of the biomass were investigated by potentiometric titrations and Fourier transform infrared spectroscopy. The obtained results indicated that important functional groups presented on the biomass were carboxyl, amino and hydroxyl groups. Only carboxyl and hydroxyl groups were found to play an important role in copper (II) biosorption
关键词：Streptomyces fradiae; potentiometric titration; chemical pretreatment; biosorption
