A novel wet-scrubbing process using Fe(VI) for simultaneous removal of SO2 and NO

Dehua Xia; Chun He; Linfei Zhu; Yanling Huang; Hanying Dong; Minhua Su; Mudar Abou Asi; Di Bian

doi:10.1039/C0EM00647E

A novel wet-scrubbing process using Fe(vi) for simultaneous removal of SO₂ and NO†‡

Dehua Xia,^a Chun He,*^ab Linfei Zhu,^a Yanling Huang,^a Hanying Dong,^ab Minhua Su,^a Mudar Abou Asi^a and Di Bian^a

* Corresponding authors

^a School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China
E-mail: hechun@mail.sysu.edu.cn
Fax: +86 20 39332690
Tel: +86 20 80958871

^b Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, China

Abstract

The objective of this work was to develop a novel wet-scrubbing process using Fe(VI) for the simultaneous removal of gaseous NO and SO₂. The oxidation of SO₂ and NO with Fe(VI) was studied in aqueous solution at alkaline pH (9.0–11.0). A stoichiometric molar ratio for NO and SO₂ oxidation with Fe(VI) was determined to be nearly 3.0. Sulfate and nitrate was identified as final products by ion chromatography from the reaction at pH 9.0–11.0. The feasibility of simultaneous removal of multiple gas pollutants with the continuous feeding of ferrate in lab-scale was investigated from the view of industrial application. It was found that the removal efficiency of NO and SO₂ was enhanced with the increase of Fe(VI) concentration, more than 90% NO removal efficiency and 100% SO₂ removal efficiency were achieved by wet-scrubbing process using Fe(VI) at room temperature and ambient atmosphere. The results demonstrate that Fe(VI) could be an effective wet-scrubbing agent for the simultaneous removal of NO and SO₂.

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Article information

DOI: https://doi.org/10.1039/C0EM00647E
Article type: Paper
Submitted: 31 Oct 2010
Accepted: 08 Mar 2011
First published: 22 Mar 2011

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J. Environ. Monit., 2011,13, 864-870

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A novel wet-scrubbing process using Fe(VI) for simultaneous removal of SO₂ and NO

D. Xia, C. He, L. Zhu, Y. Huang, H. Dong, M. Su, M. A. Asi and D. Bian, J. Environ. Monit., 2011, 13, 864 DOI: 10.1039/C0EM00647E

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