Adsorption Behavior of Methyl Orange onto Modified Ultrafine Coal Powder

›› 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. 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. 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

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

LIU Zhuannian, ZHOU Anning, WANG Guirong, ZHAO Xiaoguang. Adsorption Behavior of Methyl Orange onto Modified Ultrafine Coal Powder[J]. , 2009, 17(6): 942-948.

刘转年, 周安宁, 王贵荣, 赵晓光. Adsorption Behavior of Methyl Orange onto Modified Ultrafine Coal Powder[J]. , 2009, 17(6): 942-948.

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Adsorption Behavior of Methyl Orange onto Modified Ultrafine Coal Powder

Adsorption Behavior of Methyl Orange onto Modified Ultrafine Coal Powder

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