ENHANCED ADSORPTION OF PHENOL USING ALKALINE MODIFIED ACTIVATED CARBON PREPARED FROM OLIVE STONES

ABSTRACT Activated carbon (AC) prepared from olive stone (OSAC) was modified separately by ammoniac (OSAC/AM) and sodium hydroxide (OSAC/H) aqueous solutions impregnation in order to improve their adsorption properties toward phenol. The raw and modified activated carbons were characterized. The por...

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Autores principales:	Nouha,Soudani, Souad,Najar-Souissi, Abdelmottalab,Ouederni
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2019
Materias:	Activated carbon alkaline solution surface functional groups porosity phenol adsorption
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072019000104352
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spelling	oai:scielo:S0717-970720190001043522019-04-11ENHANCED ADSORPTION OF PHENOL USING ALKALINE MODIFIED ACTIVATED CARBON PREPARED FROM OLIVE STONESNouha,SoudaniSouad,Najar-SouissiAbdelmottalab,Ouederni Activated carbon alkaline solution surface functional groups porosity phenol adsorption ABSTRACT Activated carbon (AC) prepared from olive stone (OSAC) was modified separately by ammoniac (OSAC/AM) and sodium hydroxide (OSAC/H) aqueous solutions impregnation in order to improve their adsorption properties toward phenol. The raw and modified activated carbons were characterized. The porous structure was characterized using N2 adsorption at 77 K. The surface functional group characteristics were examined by Fourier transform infrared (FTIR) spectroscopy, Boehm titration, the point of zero charge (pHpzc) measurement and X-ray photoelectron spectroscopy (XPS) method. The isotherms of phenol adsorption on the original and modified ACs were measured. After modification, the activated carbon showed enhanced adsorption capacity for phenol. The effect of alkaline solution concentration on adsorption process was investigated. Results showed a decrease of the microporosity of AC after alkalin treatment especially for higher solution concentration. The amounts of the surface basic groups of the modified ACs increased, in comparison with the original AC, with the increase of the alkaline concentration; however the acidic surface groups decreased. The equilibrium adsorption data were best described by Langmuir model. The maximum adsorption capacity of phenol enhanced for ammonia and sodium hydroxide, respectively, compared with the original AC. We noted that the higher alkaline concentration the higher the adsorption capacity of AC for phenol.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.64 n.1 20192019-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072019000104352en10.4067/s0717-97072019000104352
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Activated carbon alkaline solution surface functional groups porosity phenol adsorption
spellingShingle	Activated carbon alkaline solution surface functional groups porosity phenol adsorption Nouha,Soudani Souad,Najar-Souissi Abdelmottalab,Ouederni ENHANCED ADSORPTION OF PHENOL USING ALKALINE MODIFIED ACTIVATED CARBON PREPARED FROM OLIVE STONES
description	ABSTRACT Activated carbon (AC) prepared from olive stone (OSAC) was modified separately by ammoniac (OSAC/AM) and sodium hydroxide (OSAC/H) aqueous solutions impregnation in order to improve their adsorption properties toward phenol. The raw and modified activated carbons were characterized. The porous structure was characterized using N2 adsorption at 77 K. The surface functional group characteristics were examined by Fourier transform infrared (FTIR) spectroscopy, Boehm titration, the point of zero charge (pHpzc) measurement and X-ray photoelectron spectroscopy (XPS) method. The isotherms of phenol adsorption on the original and modified ACs were measured. After modification, the activated carbon showed enhanced adsorption capacity for phenol. The effect of alkaline solution concentration on adsorption process was investigated. Results showed a decrease of the microporosity of AC after alkalin treatment especially for higher solution concentration. The amounts of the surface basic groups of the modified ACs increased, in comparison with the original AC, with the increase of the alkaline concentration; however the acidic surface groups decreased. The equilibrium adsorption data were best described by Langmuir model. The maximum adsorption capacity of phenol enhanced for ammonia and sodium hydroxide, respectively, compared with the original AC. We noted that the higher alkaline concentration the higher the adsorption capacity of AC for phenol.
author	Nouha,Soudani Souad,Najar-Souissi Abdelmottalab,Ouederni
author_facet	Nouha,Soudani Souad,Najar-Souissi Abdelmottalab,Ouederni
author_sort	Nouha,Soudani
title	ENHANCED ADSORPTION OF PHENOL USING ALKALINE MODIFIED ACTIVATED CARBON PREPARED FROM OLIVE STONES
title_short	ENHANCED ADSORPTION OF PHENOL USING ALKALINE MODIFIED ACTIVATED CARBON PREPARED FROM OLIVE STONES
title_full	ENHANCED ADSORPTION OF PHENOL USING ALKALINE MODIFIED ACTIVATED CARBON PREPARED FROM OLIVE STONES
title_fullStr	ENHANCED ADSORPTION OF PHENOL USING ALKALINE MODIFIED ACTIVATED CARBON PREPARED FROM OLIVE STONES
title_full_unstemmed	ENHANCED ADSORPTION OF PHENOL USING ALKALINE MODIFIED ACTIVATED CARBON PREPARED FROM OLIVE STONES
title_sort	enhanced adsorption of phenol using alkaline modified activated carbon prepared from olive stones
publisher	Sociedad Chilena de Química
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072019000104352
work_keys_str_mv	AT nouhasoudani enhancedadsorptionofphenolusingalkalinemodifiedactivatedcarbonpreparedfromolivestones AT souadnajarsouissi enhancedadsorptionofphenolusingalkalinemodifiedactivatedcarbonpreparedfromolivestones AT abdelmottalabouederni enhancedadsorptionofphenolusingalkalinemodifiedactivatedcarbonpreparedfromolivestones
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ENHANCED ADSORPTION OF PHENOL USING ALKALINE MODIFIED ACTIVATED CARBON PREPARED FROM OLIVE STONES

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