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首页> 外文期刊>Bioprocess and Biosystems Engineering >Adsorption of Ag (Ⅰ) from aqueous solution by waste yeast: kinetic, equilibrium and mechanism studies
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Adsorption of Ag (Ⅰ) from aqueous solution by waste yeast: kinetic, equilibrium and mechanism studies

机译：废酵母吸附水溶液中Ag（Ⅰ）的动力学，平衡及机理研究

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摘要

One type of biosorbents, brewer fermentation industry waste yeast, was developed to adsorb the Ag (Ⅰ) in aqueous solution. The result of FTIR analysis of waste yeast indicated that the ion exchange, chelating and reduction were the main binding mechanisms between the silver ions and the binding sites on the surface of the biomass. Furthermore, TEM, XRD and XPS results suggested that Ag° nanoparticles were deposited on the surface of yeast. The kinetic experiments revealed that sorption equilibrium could reach within 60 min, and the removal efficiency of Ag (Ⅰ) could be still over 93 % when the initial concentration of Ag (Ⅰ) was below 100 mg/L. Thermodynamic parameters of the adsorption process (△G, △H and △S) identified that the adsorption was a spontaneous and exothermic process. The waste yeast, playing a significant role in the adsorption of the silver ions, is useful to fast adsorb Ag (Ⅰ) from low concentration.
机译：开发了一种生物吸附剂，即啤酒发酵工业废酵母，以吸附水溶液中的Ag（Ⅰ）。废酵母的FTIR分析结果表明，离子交换，螯合和还原是银离子与生物质表面结合位点之间的主要结合机理。此外，TEM，XRD和XPS结果表明Ag°纳米颗粒沉积在酵母表面上。动力学实验表明，当初始浓度低于100 mg / L时，吸附平衡可在60 min内达到，去除率仍可达到93％以上。吸附过程的热力学参数（△G，△H和△S）表明，吸附是一个自发的放热过程。废酵母在银离子的吸附中起重要作用，可用于从低浓度快速吸附Ag（Ⅰ）。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2015年第1期|69-77|共9页
  • 作者

    Yufeng Zhao; Dongfang Wang; Hezhen Xie; Sung Wook Won; Longzhe Cui; Guiping Wu;

  • 作者单位

    Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials, South-central University for Nationalities, Wuhan 430-074, Hubei, People's Republic of China;

    Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials, South-central University for Nationalities, Wuhan 430-074, Hubei, People's Republic of China;

    Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials, South-central University for Nationalities, Wuhan 430-074, Hubei, People's Republic of China;

    Department of Marine Environmental Engineering, Institute of Marine Industry, Gyeongsang National University, 38 Cheondaegukchi-gil, Tongyeong, Gyeongnam 650-160, Republic of Korea;

    Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials, South-central University for Nationalities, Wuhan 430-074, Hubei, People's Republic of China;

    Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials, South-central University for Nationalities, Wuhan 430-074, Hubei, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Adsorption; Silver; Kinetics; Mechanism; Waste yeast;

    机译：吸附;银;动力学;机制;废酵母;

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