화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.31, No.12, 2198-2206, December, 2014
DOI10.1007/s11814-014-0171-7  Export Citation
Coffee waste as potential adsorbent for the removal of basic dyes from aqueous solution
Ridha Lafi, Anouar ben Fradj, Amor Hafiane†, and B. H. Hameed1
  • Laboratory of Wastewater Treatment, CERTE, BP 273, Soliman 8020, Tunisia
  • 1School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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We evaluated the adsorption performance of coffee waste (CW), collected from coffee shops, for the removal of two basic dyes, toluidine blue (TB) and crystal violet (CV), from aqueous solutions. Batch adsorption experiments were conducted under different conditions including contact time, initial concentration of dye, pH, sorbent dosage and temperature. The Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R) isotherms were tested to examine the adsorption behavior. The equilibrium data were well fitted by Langmuir isotherm model. The kinetic study indicates that adsorption follows the pseudo second-order model. The maximum adsorption capacity was found to be as high as 142.5 mg/g for TB and 125 mg/g for CV, which makes CW a prospective adsorbent for the removal of basic dyes from aqueous solution.
Keywords:Adsorption;Coffee Waste;Basic Dyes;Isotherm;Kinetics
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