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Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

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Hubei Provincial Engineering Laboratory for Clean Production and High Value Utilization of Bio-based Textile Materials, Wuhan Textile University, Wuhan 430200, Hubei, China
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Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy
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Department of Inorganic Chemistry, Ivanovo State University of Chemistry and Technology, 7, Sheremetevsky Ave, Ivanovo 153000, Russia
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Engineering Research Centre for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan Textile University, Wuhan 430200, Hubei, China
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Authors to whom correspondence should be addressed.
Water 2019, 11(12), 2532; https://doi.org/10.3390/w11122532
Received: 15 October 2019 / Revised: 18 November 2019 / Accepted: 26 November 2019 / Published: 30 November 2019
(This article belongs to the Section Water and Wastewater Treatment)
In this study, a Fenton-activated persulfate (Fe2+/PS) system was introduced for the efficient degradation of Mordant Blue 9 (MB 9) as a textile dye in an aqueous solution. Results showed that the degradation of MB 9 was markedly influenced by operational parameters, such as initial pH, PS concentration, Fe2+ concentration, and initial dye concentration. Optimal reaction conditions were then determined. Inorganic anions, such as Cl and HCO3, enhanced the degradation efficiency of MB 9 under optimal conditions. Addition of HCO3 reduced the degradation performance of MB 9, whereas the addition of Cl increased the degradation percentage of MB 9. In addition, quenching experiments were conducted using methanol and tert-butyl alcohol as scavengers, and methanol was identified as an effective scavenger. Thus, the degradation of MB 9 was attributed to S O 4 and OH radicals. The degradation and mineralization efficiency of MB 9 was significantly reduced using the conventional Fenton process i.e., Fe2+/ hydrogen peroxide (HP) because of the formation of a Fe complex during degradation. Meanwhile, the Fe2+/persulfate (PS) system improved the degradation and mineralization performance. View Full-Text
Keywords: Fenton-activated; Fe-complex; persulfate; mordant dyes; scavengers Fenton-activated; Fe-complex; persulfate; mordant dyes; scavengers
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Pervez, M.N.; Telegin, F.Y.; Cai, Y.; Xia, D.; Zarra, T.; Naddeo, V. Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System. Water 2019, 11, 2532.

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