SCI和EI收录∣中国化工学会会刊

›› 2009, Vol. 17 ›› Issue (6): 942-948.

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Adsorption Behavior of Methyl Orange onto Modified Ultrafine Coal Powder

LIU Zhuannian1, ZHOU Anning2, WANG Guirong1, ZHAO Xiaoguang1   

  1. 1. College of Geology and Environment, Xi'an University of Science & Technology, Xi'an 710054, China;
    2. College of Chemistry and Chemical Engineering, Xi'an University of Science & Technology, Xi'an 710054, China
  • Received:2008-12-14 Revised:2009-07-07 Online:2009-12-28 Published:2009-12-28
  • Supported by:
    Supported by the National Science Foundation for Post Doctoral Scientists of China (20070411124);Scientific and Technological Key Project of Shaanxi Province (2006k07-G19);Industrialization Project of Shaanxi Provincial Department of Education (06JC11)

Adsorption Behavior of Methyl Orange onto Modified Ultrafine Coal Powder

刘转年1, 周安宁2, 王贵荣1, 赵晓光1   

  1. 1. College of Geology and Environment, Xi'an University of Science & Technology, Xi'an 710054, China;
    2. College of Chemistry and Chemical Engineering, Xi'an University of Science & Technology, Xi'an 710054, China
  • 通讯作者: LIU Zhuannian,E-mail:zhuannianliu@163.com
  • 基金资助:
    Supported by the National Science Foundation for Post Doctoral Scientists of China (20070411124);Scientific and Technological Key Project of Shaanxi Province (2006k07-G19);Industrialization Project of Shaanxi Provincial Department of Education (06JC11)

Abstract: The adsorption of methyl orange onto ultrafine coal powder(UCP) and modified ultrafine coal powder(MUCP) from aqueous solutions were studied,in which the influence of contact time,dosage,temperature,pH,and methyl orange concentration in the solution were investigated.The adsorption kinetics of methyl orange by UCP and MUCP can be described by the Lagergren first-order and pseudo second-order kinetic models,respectively.The adsorption isotherms of methyl orange onto MUCP at 303,313 and 323 K follow the Freundlich and Langmuir isotherm equation.Values of ΔG0 for methyl orange adsorption onto MUCP are -22.55,-23.10 and -23.79 kJ·mol-1 at 303,313,and 323 K,respectively.The values of ΔH0 and ΔS0 are Δ3.74 kJ·mol-1 and 61.99 J·mol-1,respectively.The adsorption process is spontaneous and exothermic.

Key words: ultrafine coal powder, methyl orange, adsorption, wastewater treatment

摘要: The adsorption of methyl orange onto ultrafine coal powder(UCP) and modified ultrafine coal powder(MUCP) from aqueous solutions were studied,in which the influence of contact time,dosage,temperature,pH,and methyl orange concentration in the solution were investigated.The adsorption kinetics of methyl orange by UCP and MUCP can be described by the Lagergren first-order and pseudo second-order kinetic models,respectively.The adsorption isotherms of methyl orange onto MUCP at 303,313 and 323 K follow the Freundlich and Langmuir isotherm equation.Values of ΔG0 for methyl orange adsorption onto MUCP are -22.55,-23.10 and -23.79 kJ·mol-1 at 303,313,and 323 K,respectively.The values of ΔH0 and ΔS0 are Δ3.74 kJ·mol-1 and 61.99 J·mol-1,respectively.The adsorption process is spontaneous and exothermic.

关键词: ultrafine coal powder, methyl orange, adsorption, wastewater treatment