Removal of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study

This article was aimed at investigating the removal of metronidazole (MNZ) from aquatic solutions by modified activated carbon (MAC) with amine groups. The effect of various parameters on the adsorption rate such as the initial pH, adsorbent dose and initial concentration of MNZ and contact time wer...

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Autores principales:	Ali Ahmadfazeli, Yousef Poureshgh, Yousef Rashtbari, Hamed Akbari, Peyman Pourali, Amir Adibzadeh
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	adsorption isotherm kinetic metronidazole antibiotic modified activated carbon Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/3c71b92c849c471f9d86d28113fa417c
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spelling	oai:doaj.org-article:3c71b92c849c471f9d86d28113fa417c2021-11-23T18:23:10ZRemoval of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study2043-90832408-936210.2166/washdev.2021.117https://doaj.org/article/3c71b92c849c471f9d86d28113fa417c2021-11-01T00:00:00Zhttp://washdev.iwaponline.com/content/11/6/1083https://doaj.org/toc/2043-9083https://doaj.org/toc/2408-9362This article was aimed at investigating the removal of metronidazole (MNZ) from aquatic solutions by modified activated carbon (MAC) with amine groups. The effect of various parameters on the adsorption rate such as the initial pH, adsorbent dose and initial concentration of MNZ and contact time were scrutinized. MAC was characterized by Fourier transform infrared spectroscopy and Brunauer–Emmett–Teller techniques. The obtained results illustrated that under the optimum conditions (pH = 3, contact time = 50 min, initial MNZ concentration = 5 mg/L and MAC dose = 0.5 g/L), the maximum adsorption efficiency was 95%. Furthermore, the kinetic studies indicated the applicability of the pseudo-second-order kinetic model, whereas the adsorption isotherm fitted well with the Freundlich model (0.996), and the maximum adsorption capacity was 66.22 mg/g. The SBET and the total pure volume of MAC were 706.92 m2/g and 0.532 cm3/g, respectively. Also, the regeneration tests demonstrated that MAC had good stability after five cycles (73%). It can be concluded that MAC, as an effective adsorbent, has a high ability to remove MNZ from aqueous solutions. HIGHLIGHTS MNZ Adsorption was high in acidic conditions.; MNZ removal performance decreased with increasing initial MNZ concentration.; MNZ adsorption was well proportionated with the pseudo-second-order and Freundlich models.; MAC regeneration showed that this adsorbent has promising capacity in five regeneration cycles for MNZ removal.;Ali AhmadfazeliYousef PoureshghYousef RashtbariHamed AkbariPeyman PouraliAmir AdibzadehIWA Publishingarticleadsorption isothermkineticmetronidazole antibioticmodified activated carbonEnvironmental technology. Sanitary engineeringTD1-1066ENJournal of Water, Sanitation and Hygiene for Development, Vol 11, Iss 6, Pp 1083-1096 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption isotherm kinetic metronidazole antibiotic modified activated carbon Environmental technology. Sanitary engineering TD1-1066
spellingShingle	adsorption isotherm kinetic metronidazole antibiotic modified activated carbon Environmental technology. Sanitary engineering TD1-1066 Ali Ahmadfazeli Yousef Poureshgh Yousef Rashtbari Hamed Akbari Peyman Pourali Amir Adibzadeh Removal of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study
description	This article was aimed at investigating the removal of metronidazole (MNZ) from aquatic solutions by modified activated carbon (MAC) with amine groups. The effect of various parameters on the adsorption rate such as the initial pH, adsorbent dose and initial concentration of MNZ and contact time were scrutinized. MAC was characterized by Fourier transform infrared spectroscopy and Brunauer–Emmett–Teller techniques. The obtained results illustrated that under the optimum conditions (pH = 3, contact time = 50 min, initial MNZ concentration = 5 mg/L and MAC dose = 0.5 g/L), the maximum adsorption efficiency was 95%. Furthermore, the kinetic studies indicated the applicability of the pseudo-second-order kinetic model, whereas the adsorption isotherm fitted well with the Freundlich model (0.996), and the maximum adsorption capacity was 66.22 mg/g. The SBET and the total pure volume of MAC were 706.92 m2/g and 0.532 cm3/g, respectively. Also, the regeneration tests demonstrated that MAC had good stability after five cycles (73%). It can be concluded that MAC, as an effective adsorbent, has a high ability to remove MNZ from aqueous solutions. HIGHLIGHTS MNZ Adsorption was high in acidic conditions.; MNZ removal performance decreased with increasing initial MNZ concentration.; MNZ adsorption was well proportionated with the pseudo-second-order and Freundlich models.; MAC regeneration showed that this adsorbent has promising capacity in five regeneration cycles for MNZ removal.;
format	article
author	Ali Ahmadfazeli Yousef Poureshgh Yousef Rashtbari Hamed Akbari Peyman Pourali Amir Adibzadeh
author_facet	Ali Ahmadfazeli Yousef Poureshgh Yousef Rashtbari Hamed Akbari Peyman Pourali Amir Adibzadeh
author_sort	Ali Ahmadfazeli
title	Removal of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study
title_short	Removal of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study
title_full	Removal of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study
title_fullStr	Removal of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study
title_full_unstemmed	Removal of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study
title_sort	removal of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/3c71b92c849c471f9d86d28113fa417c
work_keys_str_mv	AT aliahmadfazeli removalofmetronidazoleantibioticfromaqueoussolutionbyammoniamodifiedactivatedcarbonadsorptionisothermandkineticstudy AT yousefpoureshgh removalofmetronidazoleantibioticfromaqueoussolutionbyammoniamodifiedactivatedcarbonadsorptionisothermandkineticstudy AT yousefrashtbari removalofmetronidazoleantibioticfromaqueoussolutionbyammoniamodifiedactivatedcarbonadsorptionisothermandkineticstudy AT hamedakbari removalofmetronidazoleantibioticfromaqueoussolutionbyammoniamodifiedactivatedcarbonadsorptionisothermandkineticstudy AT peymanpourali removalofmetronidazoleantibioticfromaqueoussolutionbyammoniamodifiedactivatedcarbonadsorptionisothermandkineticstudy AT amiradibzadeh removalofmetronidazoleantibioticfromaqueoussolutionbyammoniamodifiedactivatedcarbonadsorptionisothermandkineticstudy
_version_	1718416147325386752

Removal of metronidazole antibiotic from aqueous solution by ammonia-modified activated carbon: adsorption isotherm and kinetic study

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