Application of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation

To cope with the increasingly severe challenges of zinc oxide nanoparticles (ZnO-NPs) in the field of the aquatic environment, this paper uses poly-aluminum ferric chloride (PAFC) and cationic polyacrylamide (CPAM) as coagulants to enhance the removal of ZnO-NPs from water. In two environments (pure...

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Autores principales:	Zhaoyang You, Changrong Zhao, Yongjun Sun, Chang Zhuang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	coagulation floc size nanoparticles response-surface optimization Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/0e04dc6d74714a1499867ed0365f0c1a
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spelling	oai:doaj.org-article:0e04dc6d74714a1499867ed0365f0c1a2021-11-06T11:14:02ZApplication of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation0273-12231996-973210.2166/wst.2021.219https://doaj.org/article/0e04dc6d74714a1499867ed0365f0c1a2021-07-01T00:00:00Zhttp://wst.iwaponline.com/content/84/2/484https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732To cope with the increasingly severe challenges of zinc oxide nanoparticles (ZnO-NPs) in the field of the aquatic environment, this paper uses poly-aluminum ferric chloride (PAFC) and cationic polyacrylamide (CPAM) as coagulants to enhance the removal of ZnO-NPs from water. In two environments (pure-water environment and kaolin environment) that simulate suspended solids, we studied the dosage, pH, precipitation time, and hydraulic power of ZnO-NPs at three different initial concentrations (1, 2, and 30 mg/L). The effects of various conditions on the performance of PAFC, CPAM, and PAFC/CPAM to remove ZnO-NPs were examined. Results showed that the overall removal rate of ZnO-NPs in the kaolin environment was slightly higher than that in the pure-water environment. In contrast the removal rate of ZnO-NPs in the PAFC/CPAM was significantly higher than that of PAFC or CPAM alone. The coagulation removal conditions of ZnO-NPs were optimized using a response-surface model. Under the best conditions, the removal rate of ZnO-NPs with an initial mass concentration of 30 mg/L in the PAFC/CPAM combination in pure-water and kaolin environments was 98.54% and 99.17%, respectively. Finally, by studying the changes in floc size during coagulation, enhanced coagulation was an efficient method of removing ZnO-NPs from water. Highlights The combination of PAFC and CPAM can efficiently remove ZnO-NPs.; Kaolin can promote the removal efficiency of ZnO-NPs.; The RSM model can reflect the optimal removal conditions for coagulation to remove ZnO-NPs.; CPAM can further increase the particle size and compactness of ZnO-NPs flocs after coagulation.;Zhaoyang YouChangrong ZhaoYongjun SunChang ZhuangIWA Publishingarticlecoagulationfloc sizenanoparticlesresponse-surface optimizationEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 2, Pp 484-498 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coagulation floc size nanoparticles response-surface optimization Environmental technology. Sanitary engineering TD1-1066
spellingShingle	coagulation floc size nanoparticles response-surface optimization Environmental technology. Sanitary engineering TD1-1066 Zhaoyang You Changrong Zhao Yongjun Sun Chang Zhuang Application of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation
description	To cope with the increasingly severe challenges of zinc oxide nanoparticles (ZnO-NPs) in the field of the aquatic environment, this paper uses poly-aluminum ferric chloride (PAFC) and cationic polyacrylamide (CPAM) as coagulants to enhance the removal of ZnO-NPs from water. In two environments (pure-water environment and kaolin environment) that simulate suspended solids, we studied the dosage, pH, precipitation time, and hydraulic power of ZnO-NPs at three different initial concentrations (1, 2, and 30 mg/L). The effects of various conditions on the performance of PAFC, CPAM, and PAFC/CPAM to remove ZnO-NPs were examined. Results showed that the overall removal rate of ZnO-NPs in the kaolin environment was slightly higher than that in the pure-water environment. In contrast the removal rate of ZnO-NPs in the PAFC/CPAM was significantly higher than that of PAFC or CPAM alone. The coagulation removal conditions of ZnO-NPs were optimized using a response-surface model. Under the best conditions, the removal rate of ZnO-NPs with an initial mass concentration of 30 mg/L in the PAFC/CPAM combination in pure-water and kaolin environments was 98.54% and 99.17%, respectively. Finally, by studying the changes in floc size during coagulation, enhanced coagulation was an efficient method of removing ZnO-NPs from water. Highlights The combination of PAFC and CPAM can efficiently remove ZnO-NPs.; Kaolin can promote the removal efficiency of ZnO-NPs.; The RSM model can reflect the optimal removal conditions for coagulation to remove ZnO-NPs.; CPAM can further increase the particle size and compactness of ZnO-NPs flocs after coagulation.;
format	article
author	Zhaoyang You Changrong Zhao Yongjun Sun Chang Zhuang
author_facet	Zhaoyang You Changrong Zhao Yongjun Sun Chang Zhuang
author_sort	Zhaoyang You
title	Application of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation
title_short	Application of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation
title_full	Application of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation
title_fullStr	Application of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation
title_full_unstemmed	Application of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation
title_sort	application of pafc/cpam for the removal of zno nanoparticles by enhanced coagulation
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/0e04dc6d74714a1499867ed0365f0c1a
work_keys_str_mv	AT zhaoyangyou applicationofpafccpamfortheremovalofznonanoparticlesbyenhancedcoagulation AT changrongzhao applicationofpafccpamfortheremovalofznonanoparticlesbyenhancedcoagulation AT yongjunsun applicationofpafccpamfortheremovalofznonanoparticlesbyenhancedcoagulation AT changzhuang applicationofpafccpamfortheremovalofznonanoparticlesbyenhancedcoagulation
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Application of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation

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