SAWDUST-BASED ACTIVATED CARBON FOR MALACHITE GREEN REMOVAL: KINETIC AND THERMODYNAMIC STUDY - Université Savoie Mont Blanc Access content directly
Journal Articles PRO LIGNO - Open Access Scientific Journal in the Field of Wood Engineering Year : 2013

SAWDUST-BASED ACTIVATED CARBON FOR MALACHITE GREEN REMOVAL: KINETIC AND THERMODYNAMIC STUDY

Benaouda Bestani
  • Function : Author
Abderrahmane Djourdem
  • Function : Author
Noureddine Benderdouche
  • Function : Author

Abstract

Sawdust as a lignocellulosic solid waste, has been valorized and used as an adsorbent for the removal of Malachite green (MG) from aqueous solution. Impregnation in 20% KOH (SDK), and (NH4) 2 S 2 O 8 (SDP) solutions then pyrolysis at 600°C for 3 hours were found to enhance the adsorption capacity of malachite green (MG) as a pollutant significantly relative to its inactivated state (SDU). The batch adsorption experiments resulted in a maximum adsorption capacity determined from Langmuir models of up to 434.78 mg/g, 238.10 and 200.0 for SDK, SDP and Merck respectively. Parameters influencing adsorption capacity such as contact time, adsorbent dosage, pH and temperature were studied. FT-IR analyses and iodine number determination were also performed to characterize the prepared adsorbents. Adsorption kinetics was found to comply with the pseudo second order with a good correlation factor (R 2 = 0.99) with intraparticle diffusion as the rate determining steps. Thermodynamic analysis and temperature effects of the process confirm that the adsorption reaction was spontaneous (ΔG o <0) and endothermic (ΔH o >0). This study showed that sawdust as a waste could prove to be a very useful in removing toxic substances from the environment.
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Dates and versions

hal-01814514 , version 1 (13-06-2018)

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  • HAL Id : hal-01814514 , version 1

Cite

Benaouda Bestani, Abderrahmane Djourdem, Noureddine Benderdouche, L. Duclaux. SAWDUST-BASED ACTIVATED CARBON FOR MALACHITE GREEN REMOVAL: KINETIC AND THERMODYNAMIC STUDY. PRO LIGNO - Open Access Scientific Journal in the Field of Wood Engineering, 2013, 9 (4), pp.98-106. ⟨hal-01814514⟩

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