Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B

To improve the efficiency of the Fe(II)/Fe(III) cycle and continuous reactivity of pyrite, a pyrite/H2O2/hydroxylamine (HA) system was proposed to treat rhodamine B (RhB). The results showed that near-complete decolorization and 52.8% mineralization 50 mg L−1 RhB were achieved under its optimum cond...

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Autores principales:	Guang-Jun He, Deng-Jie Zhong, Yun-Lan Xu, Peng Liu, Si-Jing Zeng, Shuang Wang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	h2o2 hydroxylamine hydroxyl radical pyrite (fes2) rhodamine b Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/4b2812df96e04324bda8a1b3c52fede0
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spelling	oai:doaj.org-article:4b2812df96e04324bda8a1b3c52fede02021-11-06T11:01:50ZPyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B0273-12231996-973210.2166/wst.2021.135https://doaj.org/article/4b2812df96e04324bda8a1b3c52fede02021-05-01T00:00:00Zhttp://wst.iwaponline.com/content/83/9/2218https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732To improve the efficiency of the Fe(II)/Fe(III) cycle and continuous reactivity of pyrite, a pyrite/H2O2/hydroxylamine (HA) system was proposed to treat rhodamine B (RhB). The results showed that near-complete decolorization and 52.8% mineralization 50 mg L−1 RhB were achieved under its optimum conditions: HA 0.8 mM, H2O2 1.6 mM, pyrite 0.4 g L−1, and initial pH 4.0. The degradation reaction was dominated by an •OH radical produced by the reaction of Fe2+ with H2O2 in solution. HA primarily had two roles: in solution, HA could accelerate the Fe(II)/Fe(III) cycle through its strong reducibility to enhance RhB decolorization; on the pyrite surface, HA could improve the continuous reactivity of pyrite by inhibiting the oxidation of pyrite. In addition, the dosing manner of HA had a significant effect on RhB decolorization. In addition, the high decolorization and mineralization efficiency of other dye pollutants suggested that the pyrite/H2O2/HA system might be widely used in textile wastewater treatment. HIGHLIGHTS A pyrite/H2O2/HA system was proposed for efficient RhB decolorization in a wide-range pH of 3.0–10.0.; HA could not only promote the Fe(II)/Fe(III) cycle to enhance the decolorization of RhB, but also improve the continuous reactivity of pyrite.; The dosing manner of HA had a notable effect on RhB decolorization.; Complete decolorization and high mineralization of other dye pollutants were achieved by the proposed system.;Guang-Jun HeDeng-Jie ZhongYun-Lan XuPeng LiuSi-Jing ZengShuang WangIWA Publishingarticleh2o2hydroxylaminehydroxyl radicalpyrite (fes2)rhodamine bEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 9, Pp 2218-2231 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	h2o2 hydroxylamine hydroxyl radical pyrite (fes2) rhodamine b Environmental technology. Sanitary engineering TD1-1066
spellingShingle	h2o2 hydroxylamine hydroxyl radical pyrite (fes2) rhodamine b Environmental technology. Sanitary engineering TD1-1066 Guang-Jun He Deng-Jie Zhong Yun-Lan Xu Peng Liu Si-Jing Zeng Shuang Wang Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B
description	To improve the efficiency of the Fe(II)/Fe(III) cycle and continuous reactivity of pyrite, a pyrite/H2O2/hydroxylamine (HA) system was proposed to treat rhodamine B (RhB). The results showed that near-complete decolorization and 52.8% mineralization 50 mg L−1 RhB were achieved under its optimum conditions: HA 0.8 mM, H2O2 1.6 mM, pyrite 0.4 g L−1, and initial pH 4.0. The degradation reaction was dominated by an •OH radical produced by the reaction of Fe2+ with H2O2 in solution. HA primarily had two roles: in solution, HA could accelerate the Fe(II)/Fe(III) cycle through its strong reducibility to enhance RhB decolorization; on the pyrite surface, HA could improve the continuous reactivity of pyrite by inhibiting the oxidation of pyrite. In addition, the dosing manner of HA had a significant effect on RhB decolorization. In addition, the high decolorization and mineralization efficiency of other dye pollutants suggested that the pyrite/H2O2/HA system might be widely used in textile wastewater treatment. HIGHLIGHTS A pyrite/H2O2/HA system was proposed for efficient RhB decolorization in a wide-range pH of 3.0–10.0.; HA could not only promote the Fe(II)/Fe(III) cycle to enhance the decolorization of RhB, but also improve the continuous reactivity of pyrite.; The dosing manner of HA had a notable effect on RhB decolorization.; Complete decolorization and high mineralization of other dye pollutants were achieved by the proposed system.;
format	article
author	Guang-Jun He Deng-Jie Zhong Yun-Lan Xu Peng Liu Si-Jing Zeng Shuang Wang
author_facet	Guang-Jun He Deng-Jie Zhong Yun-Lan Xu Peng Liu Si-Jing Zeng Shuang Wang
author_sort	Guang-Jun He
title	Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B
title_short	Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B
title_full	Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B
title_fullStr	Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B
title_full_unstemmed	Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B
title_sort	pyrite/h2o2/hydroxylamine system for efficient decolorization of rhodamine b
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/4b2812df96e04324bda8a1b3c52fede0
work_keys_str_mv	AT guangjunhe pyriteh2o2hydroxylaminesystemforefficientdecolorizationofrhodamineb AT dengjiezhong pyriteh2o2hydroxylaminesystemforefficientdecolorizationofrhodamineb AT yunlanxu pyriteh2o2hydroxylaminesystemforefficientdecolorizationofrhodamineb AT pengliu pyriteh2o2hydroxylaminesystemforefficientdecolorizationofrhodamineb AT sijingzeng pyriteh2o2hydroxylaminesystemforefficientdecolorizationofrhodamineb AT shuangwang pyriteh2o2hydroxylaminesystemforefficientdecolorizationofrhodamineb
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Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B

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