Optimization of microwave irradiated - coconut shell activated carbon using response surface methodology for adsorption of benzene and toluene
| Autor: | Husna Mohd Zain, Jibril Mohammed, Usman Dadum Hamza, Muhammad Abbas Ahmad Zaini, Noor Shawal Nasri, Farid Nasir Ani |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Potassium hydroxide
Langmuir Materials science 020209 energy Inorganic chemistry Langmuir adsorption model Ocean Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Pollution Toluene chemistry.chemical_compound symbols.namesake Adsorption chemistry 0202 electrical engineering electronic engineering information engineering symbols medicine Freundlich equation 0210 nano-technology Benzene Water Science and Technology Activated carbon medicine.drug |
| Zdroj: | Desalination and Water Treatment. 57:7881-7897 |
| ISSN: | 1944-3986 1944-3994 |
| DOI: | 10.1080/19443994.2015.1029010 |
| Popis: | Effluents from various industries release volatile organic compounds (VOCs) into the environment which causes serious environmental hazards. Coconut shell-based porous carbons were synthesized using chemical activation with potassium hydroxide (KOH) for adsorption of benzene and toluene. Central composite design of the response surface methodology was used in the optimization of the preparation conditions of the porous carbons. The effects of microwave power, irradiation time, and KOH impregnation ratio (IR) on benzene and toluene removal were investigated. The optimum condition was obtained at microwave power of 500 W; irradiation time 4 min; and 1.5 KOH IR, which resulted in 84 and 85% removal of benzene and toluene, respectively, at 95% yield of activated carbon (AC) from the char. Equilibrium data were fitted to Langmuir, Freundlich, and Temkin isotherms with all the models having R2 > 0.94. The equilibrium data were best fitted by Langmuir isotherm, with maximum adsorption capacity of 212 and... |
| Databáze: | OpenAIRE |
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