http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Treatment of industrial wastewater containing copper and cobalt ions using modified chitosan
Nabel A. Negma,Ragaa El Sheikh,Ahmed. F. El-Farargy,Hassan H.H. Hefni,Mahmoud Bekhit 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Chitosan was extracted and characterized using several analyses. The produced chitosan was reacted byglycine and chloroacetic acid. Chemical structures of biosorbents were confirmed. Adsorptionefficiencies of the two biosorbents in neutral and alkaline medium at 25 8C were determined usingatomic absorption spectroscopic analysis. Adsorption capacity ofmodified biosorbents toward Cu(II) andCo(II) ions was determined and compared to virgin chitosan. The biosorbents showed lower adsorptionefficiency toward copper and cobalt ions compared to virgin biosorbent. Furthermore, adsorptioncapacity of glycine–chitosan was higher than chloroacetic acid–chitosan biosorbents, which attributedto chelating of amino groups than chloro-substituted polymer. Thermodynamic studies showed thespontaneous behavior of the adsorption process of metal ions under the studied conditions. Entropychanges indicate that the adsorption of the metal ions are endothermic process, and lower values of DS8indicate the affinity toward metal ions by the biosorbents at different degrees depending on theirchemical structures.