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Behzad Heibati,Susana Rodriguez-Couto,Abdeltif Amrane,Mohd. Rafatullah,Alaa Hawari,Mohammad A. Al-Ghouti 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
The potential of using pumice and walnut wood activated carbon as low-cost adsorbents for the removal of the diazo dye Reactive Black 5 (RB5) from aqueous solutions was investigated. The Langmuir isotherm fit to the data specified the presence of two different natures of adsorption sites with different binding energies on the AC-W surface. Kinetic modelling showed that the adsorption behaviour and mechanism of RB5 for both adsorbents is believed to happen via surface adsorption followed by diffusion into the pores of the AC-W and pumice. The main adsorption mechanisms are hydrogen bonding, electrostatic bonding and n–π interactions.
Behzad Heibati,Ahmad B. Albadarin,Susana Rodriguez-Couto,Nurdan Gamze Turan,Okan Ozgonenel,M. Asif,Inderjeet Tyagi,Shilpi Agarwal,Vinod Kumar Gupta 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.31 No.-
Rapid removal of the Acid Orange 7 (AO7) from aqueous solutions using natural pumice (NP) and Fecoatedpumice (Fe-CP) as low-cost adsorbents was well investigated and elucidated. The impact ofseveral influential parameters such as initial pH, initial AO7 concentration and contact time on theadsorption of AO7 removal was studied and optimized. The good agreement of adsorption equilibriumdata and analysis of isotherms with the Freundlich isotherm proved that it is the best fitted adsorptionisotherm model for the depicting the AO7 adsorption on both the developed adsorbents, which clearlyindicates the heterogeneity of the adsorbent surface. The maximum adsorption capacities for the NP andFe-CP were found to be 15.56 and 27.68 mg/g, respectively. The rate of adsorption followed the pseudosecond-order kinetic model.
Mohammad Hadi Dehghani,Masoome Mostofi,Mahmood Alimohammadi,Gordon McKay,Kaan Yetilmezsoy,Ahmad B. Albadarin,Behzad Heibati,Mohammad Al Ghouti,N.M. Mubarak,J.N. Sahu 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.35 No.-
The adsorption capabilities of two nano-sized adsorbents: multi-walled carbon nanotubes (MWCNTs)and single-walled carbon nanotubes (SWCNTs) were investigated for the removal of toxic phenol. Themaximum adsorption capacities of MWCNTs and SWCNTs were determined as 64.60 and 50.51 mg/g,respectively. Adsorption kinetics followed the pseudo-second order model for both adsorbents. Theoptimum conditions using SWCNTs and MWCNTs were pH 6.57 and 4.65, phenol concentration 50 and50 mg/L, dose 1.97 and 2 g/L and contact time 36 and 56 min, respectively. The results indicated thatMWCNTs and SWCNTs were proven as high-performance adsorbents for toxic phenol removal fromwastewater.