Equilibrium, kinetic and mechanism studies on the biosorption of Cu2+ and Ni2+ by sulfur-modified bamboo powder

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• 作者：Tian Ai ; Xiaojun Jiang ; Hongmei Yu ; Hongbo Xu…
• 关键词：Sulfur Modification ; Biosorption ; Bamboo Powder ; Copper ; Nickel
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：32
• 期：2
• 页码：342-349
• 全文大小：603 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Catalysis
  Materials Science
  Biotechnology
  
• 出版者：Springer New York
• ISSN：1975-7220

文摘

Two biosorbents were prepared using bamboo powder modified with mercaptoacetic acid and carbon disulfide, which exhibits strong adsorption properties for Cu2+ and Ni2+. The obtained materials were characterized by FTIR. Maximum adsorption for both metals was found to occur around pH 5.0-.5. The kinetic data followed the pseudo-second-order model. The maximum adsorption capacities of Cu2+ and Ni2+ on mercaptoacetic acid modified bamboo powder determined from Langmuir isotherm were 103.97mg g? and 61.35mg g?, respectively. While on carbon disulfide modified bamboo powder were 128.21mg g? and 56.82mg g?, respectively. The adsorption mechanism analysis revealed that the most possible adsorption mode of Cu2+ was coordination, and Ni2+ was ion exchange. The obtained adsorbents could effectively remove Cu2+ and Ni2+ from industrial electroplating wastewater and could be used repeatedly for more than five cycles.