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首页> 外文期刊>Journal of industrial and engineering chemistry >Treatment of industrial wastewater containing copper and cobalt ions using modified chitosan
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Treatment of industrial wastewater containing copper and cobalt ions using modified chitosan

机译：改性壳聚糖处理含铜和钴离子的工业废水

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摘要

Chitosan was extracted and characterized using several analyses. The produced chitosan was reacted by glycine and chloroacetic acid. Chemical structures of biosorbents were confirmed. Adsorption efficiencies of the two biosorbents in neutral and alkaline medium at 25 degrees C were determined using atomic absorption spectroscopic analysis. Adsorption capacity of modified biosorbents toward Cu(II) and Co(II) ions was determined and compared to virgin chitosan. The biosorbents showed lower adsorption efficiency toward copper and cobalt ions compared to virgin biosorbent Furthermore, adsorption capacity of glycine-chitosan was higher than chloroacetic acid-chitosan biosorbents, which attributed to chelating of amino groups than chloro-substituted polymer. Thermodynamic studies showed the spontaneous behavior of the adsorption process of metal ions under the studied conditions. Entropy changes indicate that the adsorption of the metal ions are endothermic process, and lower values of Delta S degrees indicate the affinity toward metal ions by the biosorbents at different degrees depending on their chemical structures. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：提取壳聚糖并使用多种分析进行表征。产生的壳聚糖与甘氨酸和氯乙酸反应。确认了生物吸附剂的化学结构。使用原子吸收光谱分析确定两种生物吸附剂在25°C下在中性和碱性介质中的吸附效率。测定改性生物吸附剂对Cu（II）和Co（II）离子的吸附能力，并将其与纯壳聚糖进行比较。与原始生物吸附剂相比，该生物吸附剂对铜和钴离子的吸附效率更低。此外，甘氨酸-壳聚糖的吸附能力高于氯乙酸-壳聚糖生物吸附剂，这归因于氨基的螯合而不是氯取代的聚合物。热力学研究表明，在所研究的条件下，金属离子的吸附过程具有自发性。熵的变化表明金属离子的吸附是吸热过程，而ΔS度的较低值表明生物吸附剂根据其化学结构以不同程度对金属离子的亲和力。 （C）2014韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利。

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