Acid Blue 25 adsorption on base treated Shorea dasyphylla sawdust:Kinetic,isotherm,thermodynamic and spectroscopic analysis  

作　　者：Megat Ahmad Kamal Megat Hanafiah Wan Saime Wan Ngah Shahira Hilwani Zolkafly Lee Ching Teong Zafri Azran Abdul Majid 

机构地区：[1]Department of Chemistry,Faculty of Applied Sciences,Universiti Teknologi MARA [2]School of Chemical Sciences,Universiti Sains Malaysia [3]Kulliyyah of Allied Health Sciences,International Islamic University Malaysia

出　　处：《Journal of Environmental Sciences》2012年第2期261-268,共8页环境科学学报（英文版）

基　　金：the Universiti Sains Malaysia for the financial support (No. 304/PKIMIA/638056)

摘　　要：The potential of base treated Shorea dasyphylla（BTSD） sawdust for Acid Blue 25（AB 25） adsorption was investigated in a batch adsorption process.Various physiochemical parameters such as pH,stirring rate,dosage,concentration,contact time and temperature were studied.The adsorbent was characterized with Fourier transform infrared spectrophotometer,scanning electron microscope and Brunauer,Emmett and Teller analysis.The optimum conditions for AB 25 adsorption were pH 2,stirring rate 500 r/min,adsorbent dosage 0.10 g and contact time 60 min.The pseudo second-order model showed the best conformity to the kinetic data.The equilibrium adsorption of AB 25 was described by Freundlich and Langmuir,with the latter found to agree well with the isotherm model.The maximum monolayer adsorption capacity of BTSD was 24.39 mg/g at 300 K,estimated from the Langmuir model.Thermodynamic parameters such as Gibbs free energy,enthalpy and entropy were determined.It was found that AB 25 adsorption was spontaneous and exothermic.The potential of base treated Shorea dasyphylla（BTSD） sawdust for Acid Blue 25（AB 25） adsorption was investigated in a batch adsorption process.Various physiochemical parameters such as pH,stirring rate,dosage,concentration,contact time and temperature were studied.The adsorbent was characterized with Fourier transform infrared spectrophotometer,scanning electron microscope and Brunauer,Emmett and Teller analysis.The optimum conditions for AB 25 adsorption were pH 2,stirring rate 500 r/min,adsorbent dosage 0.10 g and contact time 60 min.The pseudo second-order model showed the best conformity to the kinetic data.The equilibrium adsorption of AB 25 was described by Freundlich and Langmuir,with the latter found to agree well with the isotherm model.The maximum monolayer adsorption capacity of BTSD was 24.39 mg/g at 300 K,estimated from the Langmuir model.Thermodynamic parameters such as Gibbs free energy,enthalpy and entropy were determined.It was found that AB 25 adsorption was spontaneous and exothermic.

关 键 词：Acid Blue 25 ADSORPTION Shorea dasyphylla sawdust spectroscopy THERMODYNAMIC 

分 类 号：X703[环境科学与工程—环境工程]