Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH

In this study, nitrilotriacetic acid (NTA) was used to enhance UV/Fe0/H2O2 process for highly salty wastewater at neutral pH. The addition of Fe0 could not accelerate the UV/H2O2 process for salty wastewater treatment at neutral pH due to the precipitation of Fe ions. While NTA added into UV/Fe0/H2O...

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Autores principales:	Yuwei Pan, Zhujun Dong, Yi Pan, Yizhen Zhang
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2021
Materias:	Highly salty wastewater Nitrilotriacetic acid UV/Fe0-NTA/H2O2 process Corrosion rate Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/cf4db345d9c741f1bcbbb807c3ccc93e
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spelling	oai:doaj.org-article:cf4db345d9c741f1bcbbb807c3ccc93e2021-12-02T05:03:49ZNitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH2666-445310.1016/j.watcyc.2021.11.004https://doaj.org/article/cf4db345d9c741f1bcbbb807c3ccc93e2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S266644532100009Xhttps://doaj.org/toc/2666-4453In this study, nitrilotriacetic acid (NTA) was used to enhance UV/Fe0/H2O2 process for highly salty wastewater at neutral pH. The addition of Fe0 could not accelerate the UV/H2O2 process for salty wastewater treatment at neutral pH due to the precipitation of Fe ions. While NTA added into UV/Fe0/H2O2 process which could form complex with Fe ion, the tartrazine removal could increase from 45.7% to 84.7% within 60 min. The k-value of the UV/Fe0-NTA/H2O2 system to remove tartrazine is also 2.2 times higher than that in UV/Fe0/H2O2 system. Meanwhile, the UV/Fe0-NTA/H2O2 process could obtain good performance for salt wastewater treatment under a wide salt concentration level of 0–0.2 M. It can also expand the application range of pH to neutral pH. SEM and XPS characterization showed that the corrosion rate of Fe0 in salty system was faster, and the presence of NTA could accelerate the recirculation of Fe3+/Fe2+ on the Fe0 surface. EPR spectroscopic analysis and scavenge experiments showed that •OH was the main reactive radical for the removal of tartrazine in the UV/Fe0-NTA/H2O2 system. In addition, the k-value for removing tartrazine in various types of salt systems in the UV/Fe0-NTA/H2O2 system was 3.2–4.2 times that of the UV/Fe0/H2O2 system. It demonstrated UV/Fe0-NTA/H2O2 processes fits to different types of salt system. Therefore, this study will provide a new method for the treatment of saline wastewater at neutral pH.Yuwei PanZhujun DongYi PanYizhen ZhangKeAi Communications Co., Ltd.articleHighly salty wastewaterNitrilotriacetic acidUV/Fe0-NTA/H2O2 processCorrosion rateEnvironmental technology. Sanitary engineeringTD1-1066ENWater Cycle, Vol 2, Iss , Pp 91-100 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Highly salty wastewater Nitrilotriacetic acid UV/Fe0-NTA/H2O2 process Corrosion rate Environmental technology. Sanitary engineering TD1-1066
spellingShingle	Highly salty wastewater Nitrilotriacetic acid UV/Fe0-NTA/H2O2 process Corrosion rate Environmental technology. Sanitary engineering TD1-1066 Yuwei Pan Zhujun Dong Yi Pan Yizhen Zhang Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH
description	In this study, nitrilotriacetic acid (NTA) was used to enhance UV/Fe0/H2O2 process for highly salty wastewater at neutral pH. The addition of Fe0 could not accelerate the UV/H2O2 process for salty wastewater treatment at neutral pH due to the precipitation of Fe ions. While NTA added into UV/Fe0/H2O2 process which could form complex with Fe ion, the tartrazine removal could increase from 45.7% to 84.7% within 60 min. The k-value of the UV/Fe0-NTA/H2O2 system to remove tartrazine is also 2.2 times higher than that in UV/Fe0/H2O2 system. Meanwhile, the UV/Fe0-NTA/H2O2 process could obtain good performance for salt wastewater treatment under a wide salt concentration level of 0–0.2 M. It can also expand the application range of pH to neutral pH. SEM and XPS characterization showed that the corrosion rate of Fe0 in salty system was faster, and the presence of NTA could accelerate the recirculation of Fe3+/Fe2+ on the Fe0 surface. EPR spectroscopic analysis and scavenge experiments showed that •OH was the main reactive radical for the removal of tartrazine in the UV/Fe0-NTA/H2O2 system. In addition, the k-value for removing tartrazine in various types of salt systems in the UV/Fe0-NTA/H2O2 system was 3.2–4.2 times that of the UV/Fe0/H2O2 system. It demonstrated UV/Fe0-NTA/H2O2 processes fits to different types of salt system. Therefore, this study will provide a new method for the treatment of saline wastewater at neutral pH.
format	article
author	Yuwei Pan Zhujun Dong Yi Pan Yizhen Zhang
author_facet	Yuwei Pan Zhujun Dong Yi Pan Yizhen Zhang
author_sort	Yuwei Pan
title	Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH
title_short	Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH
title_full	Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH
title_fullStr	Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH
title_full_unstemmed	Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH
title_sort	nitrilotriacetic acid enhanced uv/fe0/h2o2 process for salty wastewater treatment at neutral ph
publisher	KeAi Communications Co., Ltd.
publishDate	2021
url	https://doaj.org/article/cf4db345d9c741f1bcbbb807c3ccc93e
work_keys_str_mv	AT yuweipan nitrilotriaceticacidenhanceduvfe0h2o2processforsaltywastewatertreatmentatneutralph AT zhujundong nitrilotriaceticacidenhanceduvfe0h2o2processforsaltywastewatertreatmentatneutralph AT yipan nitrilotriaceticacidenhanceduvfe0h2o2processforsaltywastewatertreatmentatneutralph AT yizhenzhang nitrilotriaceticacidenhanceduvfe0h2o2processforsaltywastewatertreatmentatneutralph
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Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH

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