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C.K. How,Moonis Ali Khan,Soraya Hosseini,T.G. Chuah,Thomas S.Y. Choong 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
Carbon coating onto monolith through soft-template approach have been accomplished by means ofevaporative induced self-assembly (EISA). Variation in acid and alcohol content on monolith’s surfaceproperties was studied, while b-carotene was used as a modelled adsorbate. The pore architecture ofadsorbent samples was analysed through corresponding surface chemistry, N2 sorption isotherm, poresize distribution (PSD) plot, Brunauer–Emmett–Teller (BET), Barett–Joyner–Halenda (BJH) model andscanning electron microscopy (SEM). SEM images displayed a well-covered interconnected worm-likeframework of carbonaceous materials over monolith surface. Surface chemistry studies revealeddominance of acid functionalities over adsorbent samples surface, while basic functionalities remainunaltered. Carbon loading increased with increase in acid concentration, while it decreased withincrease in alcohol content. The adsorbent surface area decreased with increase in acid concentrationand alcohol content. The b-carotene adsorption capacities on synthesized samples varied between179.60 (optimum) and 112.56 mg/g (lower), respectively. Optimum b-carotene adsorption wasobserved on samples MC0.2 and MC5 with alcohol and acid content of 5 mL and 0.2 mL, respectively.
Mohamad Rasool Malekbala,Moonis Ali Khan,Soraya Hosseini,Luqman Chuah Abdullah,Thomas S.Y. Choong 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Surfactant modified carbon coated monolith was used as an adsorbent for methylene blue (MB)adsorption. Effects of pH, salt, contact time, initial dye concentrations and temperature on dyeadsorption were studied. Higher solution pH favoured MB adsorption. Furthermore, kinetics studyshowed that the adsorption could be better represented by the pseudo-second-order model. Linear andnon-linear isotherm studies revealed better fitting of Langmuir model to adsorption data with maximummonolayer adsorption capacity 388 mg/g. The adsorption was found to be spontaneous andendothermic. Desorption studies indicate that 0.1 N HCl exhibits higher elution efficiency (82.1%) withappreciable quantitative MB recovery.