首页|Influence of Coal Fly Ash Particle Size on Structure and Adsorption Properties of Forming Adsorbents for Cr6+
Influence of Coal Fly Ash Particle Size on Structure and Adsorption Properties of Forming Adsorbents for Cr6+
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Forming adsorbents FFA-R,FFA-A and FFA-B were prepared from different particle size coal fly ashes FA-R,FA-A and FA-B,their average particle sizes (d50) were 15.75,3.61 and 1.73 μm respectively.The structure and adsorption properties for Cr6+ of forming adsorbents from aqueous solution were studied.The results show that forming adsorbent prepared from the coal fly ash with smaller particle size exhibits higher specific surface area,higher pore volume and better adsorption properties for Cr6+.The adsorption kinetics of Cr6+ on FFA-R,FFA-A and FFA-B fitts the second order kinetic model and the second adsorption rate constants are 7.523,3.197 and 2.187 mg.g-1.min-1/2,respectively.The adsorption of Cr6+ on FFA-R,FFA-A and FFA-B can be described in terms of Langmuir isotherms better,and the adsorption processes are spontaneous and exothermic.
coal fly ashforming adsorbentadsorptionCr6+
LIU Zhuannian、ZHANG Yuanyuan、AN Yangkang、JING Xiuyan、LIU Yuan
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College of Geology and Environment, Xi'an University of Science & Technology, Xi'an 710054, China
Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province(Chang 'an University), Xi 'an 710064, China
College of Chemistry and Chemical Engineering, Xi 'an University of Science & Technology, Xi 'an 710054, China
Funded by the National Natural Science Foundation of ChinaNatural Science Basic Research Plan in Shaanxi Province of ChinaKey Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province(Chang'an Univer
NETL
NSTL
万方数据
维普
