Optimization of iron removal in water by nanobubbles using response surface methodology

Iron contamination, causing staining, discoloration and bad taste, is a worldwide water problem. It is necessary to focus on iron oxidation from the water. This work aims to develop nanobubbles (NBs) technology to remove iron (Fe2+) from aqueous solutions. In batch experiments, the effects of initia...

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Autores principales:	Cuizhen Sun, Guoxiu Wang, Caijuan Sun, Rupeng Liu, Zhibin Zhang, Taha Marhaba, Wen Zhang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	box–behnken design iron removal nanobubbles optimization response surface optimization Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/30824b4303b04b9186c141cdd1975a52
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spelling	oai:doaj.org-article:30824b4303b04b9186c141cdd1975a522021-11-06T07:15:17ZOptimization of iron removal in water by nanobubbles using response surface methodology1606-97491607-079810.2166/ws.2021.042https://doaj.org/article/30824b4303b04b9186c141cdd1975a522021-06-01T00:00:00Zhttp://ws.iwaponline.com/content/21/4/1608https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798Iron contamination, causing staining, discoloration and bad taste, is a worldwide water problem. It is necessary to focus on iron oxidation from the water. This work aims to develop nanobubbles (NBs) technology to remove iron (Fe2+) from aqueous solutions. In batch experiments, the effects of initial Fe2+ concentration, pH, and aeration pressure on the Fe2+ oxidation efficiency were carried out. The results showed that initial concentrations, pH and aeration pressure are significant parameters influencing Fe2+ oxidation. On the basis of single factor experiments, the Box–Behnken design was used to optimize the Fe2+ oxidation conditions with NBs using three parameters (Fe2+ concentration, pH, and aeration pressure) under the response surface methodology. The optimal Fe2+ oxidation was achieved when the initial concentration was 13.7 mg·L−1, pH = 9, and the aeration pressure was 290 kPa. The regression model of Fe2+ oxidation rate under optimized test conditions is accurate and effective. The results showed that the combination of single factor test and response surface optimization can be used to optimize the Fe2+ oxidation process with NBs. It is concluded that NBs technology is promising for Fe2+ oxidation from water. HIGHLIGHTS Nanobubbles (NBs) were developed to remove iron (Fe2+) from water.; The initial Fe2+ concentrations, pH, and aeration pressure significantly affected Fe2+ oxidation.; The Box–Behnken design was used to optimize the iron oxidation conditions in NBs system.;Cuizhen SunGuoxiu WangCaijuan SunRupeng LiuZhibin ZhangTaha MarhabaWen ZhangIWA Publishingarticlebox–behnken designiron removalnanobubblesoptimizationresponse surface optimizationWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 4, Pp 1608-1617 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	box–behnken design iron removal nanobubbles optimization response surface optimization Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	box–behnken design iron removal nanobubbles optimization response surface optimization Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Cuizhen Sun Guoxiu Wang Caijuan Sun Rupeng Liu Zhibin Zhang Taha Marhaba Wen Zhang Optimization of iron removal in water by nanobubbles using response surface methodology
description	Iron contamination, causing staining, discoloration and bad taste, is a worldwide water problem. It is necessary to focus on iron oxidation from the water. This work aims to develop nanobubbles (NBs) technology to remove iron (Fe2+) from aqueous solutions. In batch experiments, the effects of initial Fe2+ concentration, pH, and aeration pressure on the Fe2+ oxidation efficiency were carried out. The results showed that initial concentrations, pH and aeration pressure are significant parameters influencing Fe2+ oxidation. On the basis of single factor experiments, the Box–Behnken design was used to optimize the Fe2+ oxidation conditions with NBs using three parameters (Fe2+ concentration, pH, and aeration pressure) under the response surface methodology. The optimal Fe2+ oxidation was achieved when the initial concentration was 13.7 mg·L−1, pH = 9, and the aeration pressure was 290 kPa. The regression model of Fe2+ oxidation rate under optimized test conditions is accurate and effective. The results showed that the combination of single factor test and response surface optimization can be used to optimize the Fe2+ oxidation process with NBs. It is concluded that NBs technology is promising for Fe2+ oxidation from water. HIGHLIGHTS Nanobubbles (NBs) were developed to remove iron (Fe2+) from water.; The initial Fe2+ concentrations, pH, and aeration pressure significantly affected Fe2+ oxidation.; The Box–Behnken design was used to optimize the iron oxidation conditions in NBs system.;
format	article
author	Cuizhen Sun Guoxiu Wang Caijuan Sun Rupeng Liu Zhibin Zhang Taha Marhaba Wen Zhang
author_facet	Cuizhen Sun Guoxiu Wang Caijuan Sun Rupeng Liu Zhibin Zhang Taha Marhaba Wen Zhang
author_sort	Cuizhen Sun
title	Optimization of iron removal in water by nanobubbles using response surface methodology
title_short	Optimization of iron removal in water by nanobubbles using response surface methodology
title_full	Optimization of iron removal in water by nanobubbles using response surface methodology
title_fullStr	Optimization of iron removal in water by nanobubbles using response surface methodology
title_full_unstemmed	Optimization of iron removal in water by nanobubbles using response surface methodology
title_sort	optimization of iron removal in water by nanobubbles using response surface methodology
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/30824b4303b04b9186c141cdd1975a52
work_keys_str_mv	AT cuizhensun optimizationofironremovalinwaterbynanobubblesusingresponsesurfacemethodology AT guoxiuwang optimizationofironremovalinwaterbynanobubblesusingresponsesurfacemethodology AT caijuansun optimizationofironremovalinwaterbynanobubblesusingresponsesurfacemethodology AT rupengliu optimizationofironremovalinwaterbynanobubblesusingresponsesurfacemethodology AT zhibinzhang optimizationofironremovalinwaterbynanobubblesusingresponsesurfacemethodology AT tahamarhaba optimizationofironremovalinwaterbynanobubblesusingresponsesurfacemethodology AT wenzhang optimizationofironremovalinwaterbynanobubblesusingresponsesurfacemethodology
_version_	1718443786227417088

Optimization of iron removal in water by nanobubbles using response surface methodology

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