Degradation of dye in wastewater by Homogeneous Fe(VI)/NaHSO3 system. (August 2019)

• Record Type: Journal Article
• Authors: Sun, Mengying; Huang, Wenyan; Cheng, Hao; Ma, Jianfeng; Kong, Yong; Komarneni, Sridhar
• Is Part Of: Chemosphere. Volume 228(2019)
• Page Start: 595
• Page End: 601
• Publication Date: 2019-08
• Subjects: Ferrate(Ⅵ) -- Bisulfite -- Sulfite -- A wide range of pH -- Sulfate radical -- Hydroxyl radical; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2019.04.182
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: The homogeneous Fe(VI)/Na2 SO3 system has been proposed for highly efficient degradation of recalcitrant contaminants, in which sulfite could significantly enhance the transformation of organic substrate by Fe(VI). Also, the Fe(VI)/NaHSO3 system could show high efficiency across a wide range of pH conditions. The degradation rates reached up to 80% within 2 min and 70% within 5 min in strongly acidic and alkaline conditions, respectively. Unexpectedly, a faster removal rate was obtained in Fe(VI)/NaHSO3 system than that in Fe(VI)/Na2 SO3 system for the degradation of methylene blue (MB). A reasonable dye degradation mechanism was proposed and verified by a series of experiments. The high oxidation potential of Fe(VI) and other species such as sulfate and hydroxyl radicals were responsible for the outstanding capabilities of Fe(VI)/NaHSO3 system, which could significantly improve the treatment of organics in wastewater under a very wide range of pH conditions. Graphical abstract: Image 1 Highlights: Homogeneous Fe(VI)/Na2 SO3 system was developed for degradation of contaminants. Sulfite significantly enhanced the transformation of organic substrate by Fe(VI). The Fe(VI)/NaHSO3 system could show high efficiency across a wide range of pH. Dye degradation rates reached up to 80% within 2 min in strongly acidic conditions.