Preparation of novel activated carbons from H2SO4-pretreated corncob hulls with KOH activation for quick adsorption of dye and 4-chlorophenol.
作者： Feng-Chin Wu , Pin-Hsueh Wu , Ru-Ling Tseng , Ruey-Shin Juang
DOI: 10.1016/J.JENVMAN.2010.10.003
关键词: Corncob 、 Methylene blue 、 Activated carbon 、 Saturation (chemistry) 、 Adsorption 、 Sulfuric acid 、 Char 、 Nuclear chemistry 、 Carbonization 、 Organic chemistry 、 Chemistry
摘要: Abstract Corncob hull was immersed in 25 wt% H 2 SO 4 and carbonized an oven at 290 °C for 2 h to obtain the char. The char then activated 1 h 780 °C by KOH weight ratio of KOH/char 2.5, 3.0, 3.5. SEM photos carbons revealed that cell wall corncob etched into thin film structure. It shown adsorption isotherms methylene blue 4-chlorophenol on were well fitted Langmuir equation. Moreover, kinetics could be satisfactorily described Elovich normalized standard deviations are less than 2.8%. high fraction amount adsorbed within 1 min saturation demonstrated advantage prepared carbons. (q 1 /q mon ) 4-CP is up 0.807. Such quick behavior mainly attributed presence structure
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