Adsorption of Humic Acid from Aqueous Solutions onto Modified Pumice with Hexadecyl Trimethyl Ammonium Bromide

BACKGROUND AND OBJECTIVE: Removal of trihalomethanes (THMs) due to carcinogenic effects in liver, bladder, kidney and central nervous system dysfunctions is very crucial. Elimination of THMs precursors from drinking water resources is the most important step for inhibition of THMs formation. The aim...

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Autor principal:	Asgari Gh, Ghanizadeh Gh, Seyd Mohammadi A
Formato:	article
Lenguaje:	EN FA
Publicado:	Babol University of Medical Sciences 2011
Materias:	pumice stone adsorption humic acid hexadecyl trimethyl ammonium bromide Medicine R Medicine (General) R5-920
Acceso en línea:	https://doaj.org/article/cf28746617bf4b6486b6e82b20a40378
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spelling	oai:doaj.org-article:cf28746617bf4b6486b6e82b20a403782021-11-10T08:57:07ZAdsorption of Humic Acid from Aqueous Solutions onto Modified Pumice with Hexadecyl Trimethyl Ammonium Bromide1561-41072251-7170https://doaj.org/article/cf28746617bf4b6486b6e82b20a403782011-12-01T00:00:00Zhttp://jbums.org/article-1-4026-en.htmlhttps://doaj.org/toc/1561-4107https://doaj.org/toc/2251-7170BACKGROUND AND OBJECTIVE: Removal of trihalomethanes (THMs) due to carcinogenic effects in liver, bladder, kidney and central nervous system dysfunctions is very crucial. Elimination of THMs precursors from drinking water resources is the most important step for inhibition of THMs formation. The aim of this study was to investigate the adsorption of humic acid (HA) onto modified pumice with Hexadecyl Trimethyl Ammonium Bromide (HDTMA-Br).METHODS: This experimental study was carried out in chemistry laboratory of water and wastewater of Hamadan University of Medical Sciences, Hamadan, Iran. Apparent characteristics and chemical structure of pumice was determined via scanning electronic microscope (SEM), X-Ray diffraction (XRD) and X-Ray fluorescent (XRF) techniques. HA concentration was determined by photometry on 254nm. Langmuir, Freundlich and Temkin models and pseudo-first and pseudo second-order kinetics were used for adsorption isotherm and kinetics studies.FINDINGS: Elevation of preliminary concentration of HA, adsorbent dosage and contact time led to increasing of HA adsorption. Increasing of pH in the range of 3 to 12 led to decreasing of adsorption and the experimental maximum adsorption occurred in pH: 3. Adsorption of HA onto modified pumice complies with Langmuir (R2=0.99) and pseudo second-order kinetic (R2=0.99). Maximum experimental (Qexpmax) and theoretical adsorption (QCalmax) was 22.5 mg/g and 29 mg/g, respectively. Langmuir constant (b) was 0.8 L/mg.CONCLUSION: The results of this study showed that in acidic condition the modified pumice with HDTMA-Br has an appropriate efficiency on HA adsorption.Asgari Gh, Ghanizadeh Gh, Seyd Mohammadi ABabol University of Medical Sciencesarticlepumice stoneadsorptionhumic acidhexadecyl trimethyl ammonium bromideMedicineRMedicine (General)R5-920ENFAMajallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Bābul, Vol 14, Iss 1, Pp 14-22 (2011)
institution	DOAJ
collection	DOAJ
language	EN FA
topic	pumice stone adsorption humic acid hexadecyl trimethyl ammonium bromide Medicine R Medicine (General) R5-920
spellingShingle	pumice stone adsorption humic acid hexadecyl trimethyl ammonium bromide Medicine R Medicine (General) R5-920 Asgari Gh, Ghanizadeh Gh, Seyd Mohammadi A Adsorption of Humic Acid from Aqueous Solutions onto Modified Pumice with Hexadecyl Trimethyl Ammonium Bromide
description	BACKGROUND AND OBJECTIVE: Removal of trihalomethanes (THMs) due to carcinogenic effects in liver, bladder, kidney and central nervous system dysfunctions is very crucial. Elimination of THMs precursors from drinking water resources is the most important step for inhibition of THMs formation. The aim of this study was to investigate the adsorption of humic acid (HA) onto modified pumice with Hexadecyl Trimethyl Ammonium Bromide (HDTMA-Br).METHODS: This experimental study was carried out in chemistry laboratory of water and wastewater of Hamadan University of Medical Sciences, Hamadan, Iran. Apparent characteristics and chemical structure of pumice was determined via scanning electronic microscope (SEM), X-Ray diffraction (XRD) and X-Ray fluorescent (XRF) techniques. HA concentration was determined by photometry on 254nm. Langmuir, Freundlich and Temkin models and pseudo-first and pseudo second-order kinetics were used for adsorption isotherm and kinetics studies.FINDINGS: Elevation of preliminary concentration of HA, adsorbent dosage and contact time led to increasing of HA adsorption. Increasing of pH in the range of 3 to 12 led to decreasing of adsorption and the experimental maximum adsorption occurred in pH: 3. Adsorption of HA onto modified pumice complies with Langmuir (R2=0.99) and pseudo second-order kinetic (R2=0.99). Maximum experimental (Qexpmax) and theoretical adsorption (QCalmax) was 22.5 mg/g and 29 mg/g, respectively. Langmuir constant (b) was 0.8 L/mg.CONCLUSION: The results of this study showed that in acidic condition the modified pumice with HDTMA-Br has an appropriate efficiency on HA adsorption.
format	article
author	Asgari Gh, Ghanizadeh Gh, Seyd Mohammadi A
author_facet	Asgari Gh, Ghanizadeh Gh, Seyd Mohammadi A
author_sort	Asgari Gh, Ghanizadeh Gh, Seyd Mohammadi A
title	Adsorption of Humic Acid from Aqueous Solutions onto Modified Pumice with Hexadecyl Trimethyl Ammonium Bromide
title_short	Adsorption of Humic Acid from Aqueous Solutions onto Modified Pumice with Hexadecyl Trimethyl Ammonium Bromide
title_full	Adsorption of Humic Acid from Aqueous Solutions onto Modified Pumice with Hexadecyl Trimethyl Ammonium Bromide
title_fullStr	Adsorption of Humic Acid from Aqueous Solutions onto Modified Pumice with Hexadecyl Trimethyl Ammonium Bromide
title_full_unstemmed	Adsorption of Humic Acid from Aqueous Solutions onto Modified Pumice with Hexadecyl Trimethyl Ammonium Bromide
title_sort	adsorption of humic acid from aqueous solutions onto modified pumice with hexadecyl trimethyl ammonium bromide
publisher	Babol University of Medical Sciences
publishDate	2011
url	https://doaj.org/article/cf28746617bf4b6486b6e82b20a40378
work_keys_str_mv	AT asgarighghanizadehghseydmohammadia adsorptionofhumicacidfromaqueoussolutionsontomodifiedpumicewithhexadecyltrimethylammoniumbromide
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Adsorption of Humic Acid from Aqueous Solutions onto Modified Pumice with Hexadecyl Trimethyl Ammonium Bromide

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