Optimization of Congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach

In the present work, Zeolite A was modified by using hexadecyltrimethylammonium bromide (HDTMABr) for adsorption of the Congo red (CR) dye from synthetic aqueous solutions. The Modified Zeolite A (MZA) was characterized by XRD, SEM, and FTIR. The influence of solution pH (in the 4–12 range), ionic s...

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Autores principales:	Intisar Hussain Khalaf, Farah Talib Al-Sudani, Adnan A. AbdulRazak, Tahani Aldahri, Sohrab Rohani
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	congo red dye dye removal modified zeolite a rsm Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/711511165ca34292a1fcd6421cd237f7
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spelling	oai:doaj.org-article:711511165ca34292a1fcd6421cd237f72021-11-06T10:52:32ZOptimization of Congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach0273-12231996-973210.2166/wst.2021.078https://doaj.org/article/711511165ca34292a1fcd6421cd237f72021-03-01T00:00:00Zhttp://wst.iwaponline.com/content/83/6/1369https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732In the present work, Zeolite A was modified by using hexadecyltrimethylammonium bromide (HDTMABr) for adsorption of the Congo red (CR) dye from synthetic aqueous solutions. The Modified Zeolite A (MZA) was characterized by XRD, SEM, and FTIR. The influence of solution pH (in the 4–12 range), ionic strength (0.1–1 M), contact time (180 min), initial CR concentration (20–60 mg/L), temperature (24–36 °C), and an adsorbent dose (1–3 g m/L) on the % dye removal and adsorbent capacity were studied. A combined effect of the initial CR concentration and temperature on the CR removal % by MZA was also studied by applying response surface methodology (RSM). Experimental values were in a good agreement with those predicated by a second-order quartic model. A maximum of 99.24% dye removal and adsorbent capacity of 21.11 mg/g was achieved under the following conditions: pH = 7, initial CR concentration = 60 mg/L, temperature = 24 °C, ionic strength = 0.1 M, adsorbent dose = 3 g/L and 90 min contact time. The equilibrium data were subjected to the Langmuir, Freundlich and Temkin isotherms, with the latter providing the best fit while kinetic adsorption studies were conducted by applying three models. The results indicated that the removal process was best described by the pseudo-second-order model. The present study demonstrates that modified MZA can be utilized for the highly efficient CR dye removal. HIGHLIGHTS The commercial Zeolite A was successfully modified by (HDTMABr), the MZA utilized for the highly efficient Congo red dye removal.; Selection of optimal conditions for dye removal by modified Zeolite A.; Adsorption mechanism has been proposed.; The results demonstrate the exothermic nature of the adsorption process for the removal of dye by modified Zeolite.;Intisar Hussain KhalafFarah Talib Al-SudaniAdnan A. AbdulRazakTahani AldahriSohrab RohaniIWA Publishingarticlecongo red dyedye removalmodified zeolite arsmEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 6, Pp 1369-1383 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	congo red dye dye removal modified zeolite a rsm Environmental technology. Sanitary engineering TD1-1066
spellingShingle	congo red dye dye removal modified zeolite a rsm Environmental technology. Sanitary engineering TD1-1066 Intisar Hussain Khalaf Farah Talib Al-Sudani Adnan A. AbdulRazak Tahani Aldahri Sohrab Rohani Optimization of Congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach
description	In the present work, Zeolite A was modified by using hexadecyltrimethylammonium bromide (HDTMABr) for adsorption of the Congo red (CR) dye from synthetic aqueous solutions. The Modified Zeolite A (MZA) was characterized by XRD, SEM, and FTIR. The influence of solution pH (in the 4–12 range), ionic strength (0.1–1 M), contact time (180 min), initial CR concentration (20–60 mg/L), temperature (24–36 °C), and an adsorbent dose (1–3 g m/L) on the % dye removal and adsorbent capacity were studied. A combined effect of the initial CR concentration and temperature on the CR removal % by MZA was also studied by applying response surface methodology (RSM). Experimental values were in a good agreement with those predicated by a second-order quartic model. A maximum of 99.24% dye removal and adsorbent capacity of 21.11 mg/g was achieved under the following conditions: pH = 7, initial CR concentration = 60 mg/L, temperature = 24 °C, ionic strength = 0.1 M, adsorbent dose = 3 g/L and 90 min contact time. The equilibrium data were subjected to the Langmuir, Freundlich and Temkin isotherms, with the latter providing the best fit while kinetic adsorption studies were conducted by applying three models. The results indicated that the removal process was best described by the pseudo-second-order model. The present study demonstrates that modified MZA can be utilized for the highly efficient CR dye removal. HIGHLIGHTS The commercial Zeolite A was successfully modified by (HDTMABr), the MZA utilized for the highly efficient Congo red dye removal.; Selection of optimal conditions for dye removal by modified Zeolite A.; Adsorption mechanism has been proposed.; The results demonstrate the exothermic nature of the adsorption process for the removal of dye by modified Zeolite.;
format	article
author	Intisar Hussain Khalaf Farah Talib Al-Sudani Adnan A. AbdulRazak Tahani Aldahri Sohrab Rohani
author_facet	Intisar Hussain Khalaf Farah Talib Al-Sudani Adnan A. AbdulRazak Tahani Aldahri Sohrab Rohani
author_sort	Intisar Hussain Khalaf
title	Optimization of Congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach
title_short	Optimization of Congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach
title_full	Optimization of Congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach
title_fullStr	Optimization of Congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach
title_full_unstemmed	Optimization of Congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach
title_sort	optimization of congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/711511165ca34292a1fcd6421cd237f7
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Optimization of Congo red dye adsorption from wastewater by a modified commercial zeolite catalyst using response surface modeling approach

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