TY - JOUR
T1 - Using Electrolytic Manganese Residue to prepare novel nanocomposite catalysts for efficient degradation of Azo Dyes in Fenton-like processes
AU - Lan, Jirong
AU - Sun, Yan
AU - Huang, Ping
AU - Du, Yaguang
AU - Zhan, Wei
AU - Zhang, Tian C.
AU - Du, Dongyun
N1 - Funding Information:
This work was financially supported by the National Sci-Tech Support Plan ( 2015BAB01B03 ) and Major Innovation Projects of Hubei Province, P. C. China ( 2019ACA156 ), which are greatly appreciated; Also, we are highly thankful to Dr. Rao Y. Surampalli for his great advises and supports on this paper.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/8
Y1 - 2020/8
N2 - In this study, Electrolytic Manganese Residue (EMR) was treated by EDTA-2Na/NaOH, ultrasonic etching, and hydrothermal reaction to obtain a novel nanocomposite catalyst (called N-EMR), which then was used, together with H2O2, to treat synthetic textile wastewater containing Reactive Red X–3B, Methyl Orange, Methylene blue and Acid Orange 7. Results indicated that the N-EMR had a nano-sheet structure in sizes of 100–200 nm; new iron and manganese oxides with high activity were produced. The mixture of a small amount of N-EMR (40 mg/L) and H2O2 (0.4 × 10−3 M) could removal about 99% of azo dyes (at 100 mg/L in 100 mL) within 6–15 min, much faster than many advanced oxidation processes (AOPs) reported in the literature. The elucidation of the associated mechanism for azo dyes degradation indicates that azo dyes were attacked by superoxide radicals, hydroxyl radicals, and electron holes generated within system. N-EMR was found to be reusable and showed limited inhibition by co-existing anions and cations. Moreover, high removal efficiency of azo dyes could happen in the system with a wide range of pH (1–8.5) and temperatures (25–45 °C), indicating that the process developed in this study may have broad application potential in treatment of azo dyes contaminated wastewater.
AB - In this study, Electrolytic Manganese Residue (EMR) was treated by EDTA-2Na/NaOH, ultrasonic etching, and hydrothermal reaction to obtain a novel nanocomposite catalyst (called N-EMR), which then was used, together with H2O2, to treat synthetic textile wastewater containing Reactive Red X–3B, Methyl Orange, Methylene blue and Acid Orange 7. Results indicated that the N-EMR had a nano-sheet structure in sizes of 100–200 nm; new iron and manganese oxides with high activity were produced. The mixture of a small amount of N-EMR (40 mg/L) and H2O2 (0.4 × 10−3 M) could removal about 99% of azo dyes (at 100 mg/L in 100 mL) within 6–15 min, much faster than many advanced oxidation processes (AOPs) reported in the literature. The elucidation of the associated mechanism for azo dyes degradation indicates that azo dyes were attacked by superoxide radicals, hydroxyl radicals, and electron holes generated within system. N-EMR was found to be reusable and showed limited inhibition by co-existing anions and cations. Moreover, high removal efficiency of azo dyes could happen in the system with a wide range of pH (1–8.5) and temperatures (25–45 °C), indicating that the process developed in this study may have broad application potential in treatment of azo dyes contaminated wastewater.
KW - AOPs
KW - Azo dyes
KW - Catalyst
KW - Electrolytic manganese residue
KW - Nanocomposite
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U2 - 10.1016/j.chemosphere.2020.126487
DO - 10.1016/j.chemosphere.2020.126487
M3 - Article
C2 - 32220714
AN - SCOPUS:85082116500
VL - 252
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
M1 - 126487
ER -