Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 1-10 |
| Journal | Journal of Environmental Management |
| Volume | 118 |
| DOIs | |
| Publication status | Published - 2013 |
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Bibliographical note
The full text of this item is not available from the repository.Keywords
- adsorption kinetics
- adsorption models
- adsorption thermodynamics
- agricultural waste
- biosorption
- olive wood
- phenols
Cite this
Improving the adsorption efficiency of phenolic compounds into olive wood biosorbents by pre-washing with organic solvents: Equilibrium, kinetic and thermodynamic aspects. / El-Sheikh, A.H.; Newman, Alan; Said, A.J.; Alzawahreha, A.M.; Abu-Helala, M.M.
In: Journal of Environmental Management, Vol. 118, 2013, p. 1-10.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Improving the adsorption efficiency of phenolic compounds into olive wood biosorbents by pre-washing with organic solvents: Equilibrium, kinetic and thermodynamic aspects
AU - El-Sheikh, A.H.
AU - Newman, Alan
AU - Said, A.J.
AU - Alzawahreha, A.M.
AU - Abu-Helala, M.M.
N1 - The full text of this item is not available from the repository.
PY - 2013
Y1 - 2013
N2 - The adsorption properties of olive wood (OW) toward phenol, 2-chlorophenol, 3-chlorophenol, 4-chlorophenol, 2-nitrophenol, 4-nitrophenol and 2,4-dinitrophenol, were improved by washing OW with some organic solvents (ethanol, tetrahydrofuran, ether, dichloromethane or hexane). Adsorption isotherms were classified according to Giles and Smith classification, in which L2-shape was obtained after OW washing. The adsorption data were modeled using Langmuir and Freundlich isotherm equations and it was found that adsorption capacity and affinity have increased after OW washing. Thermodynamic (?. G°, ?. H° and ?. S°), kinetic and intra-particle diffusion parameters were estimated before and after OW washing. It was found that the adsorption of phenols on OW was of physical nature, spontaneous, exothermic and followed second order rate equation. After OW washing, adsorption spontaneity has increased. Both pore diffusion and kinetic resistances have most likely affected the adsorption process. The results presented in this work suggested that washing OW with any one of the tested solvents would enhance uptake of the tested phenols into OW sorbent. Discussing some economical and environmental aspects suggested that the use of ethanol might be preferred.
AB - The adsorption properties of olive wood (OW) toward phenol, 2-chlorophenol, 3-chlorophenol, 4-chlorophenol, 2-nitrophenol, 4-nitrophenol and 2,4-dinitrophenol, were improved by washing OW with some organic solvents (ethanol, tetrahydrofuran, ether, dichloromethane or hexane). Adsorption isotherms were classified according to Giles and Smith classification, in which L2-shape was obtained after OW washing. The adsorption data were modeled using Langmuir and Freundlich isotherm equations and it was found that adsorption capacity and affinity have increased after OW washing. Thermodynamic (?. G°, ?. H° and ?. S°), kinetic and intra-particle diffusion parameters were estimated before and after OW washing. It was found that the adsorption of phenols on OW was of physical nature, spontaneous, exothermic and followed second order rate equation. After OW washing, adsorption spontaneity has increased. Both pore diffusion and kinetic resistances have most likely affected the adsorption process. The results presented in this work suggested that washing OW with any one of the tested solvents would enhance uptake of the tested phenols into OW sorbent. Discussing some economical and environmental aspects suggested that the use of ethanol might be preferred.
KW - adsorption kinetics
KW - adsorption models
KW - adsorption thermodynamics
KW - agricultural waste
KW - biosorption
KW - olive wood
KW - phenols
U2 - 10.1016/j.jenvman.2013.01.009
DO - 10.1016/j.jenvman.2013.01.009
M3 - Article
VL - 118
SP - 1
EP - 10
JO - Journal of Environmental Management
JF - Journal of Environmental Management
SN - 0301-4797
ER -