TY - JOUR
T1 - In-situ growth of manganese oxide on self-assembled 3D- magnesium hydroxide coated on polyurethane
T2 - Catalytic oxidation mechanism and application for Mn(II) removal
AU - Jang, Seok Byum
AU - Choong, Choe Earn
AU - Pichiah, Saravanan
AU - Choi, Jae young
AU - Yoon, Yeomin
AU - Choi, Eun Ha
AU - Jang, Min
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/2/15
Y1 - 2022/2/15
N2 - Novel integration of adsorption followed by catalytic oxidation is expected to be more beneficial for higher Mn(II) removal performance. We prepared self-assembled 3D flower-like Mg(OH)2 coated on granular-sized polyurethane (namely FMHP) via hydrothermal method at 120 °C under a facile synthesis route. The optimized material, FMHP prepared with 7 g MgO and 20 g polyurethane (FMH0.35P), achieved up to 351.2 mg g−1 Mn(II) removal capacity by Langmuir isotherm model. Besides, FMHP exhibited high Mn(II) removal in a wide range of NaCl concentration (0~0.1 M) and pH 2–9. Notably, through consecutive kinetics, BET, XPS, XRD, FESEM, and TEM analyses, it was found that the MnOx layer grows in-situ via ion exchange with Mg(II) on FMHP and further boosts the Mn(II) removal via catalytic oxidation during the Mn(II) removal process. Further, column experiments revealed that the FMH0.35P exhibited superior Mn(II) removal capacities up to 135.9 mg g−1 and highly compatible treatment costs ($0.062 m−3) compared to conventional chemical processes. The granular-sized FMH0.35P prepared by economic precursors and simple synthesis route revealed a high potential for Mn(II) containing water treatment due to its high removal capacities and easy operation.
AB - Novel integration of adsorption followed by catalytic oxidation is expected to be more beneficial for higher Mn(II) removal performance. We prepared self-assembled 3D flower-like Mg(OH)2 coated on granular-sized polyurethane (namely FMHP) via hydrothermal method at 120 °C under a facile synthesis route. The optimized material, FMHP prepared with 7 g MgO and 20 g polyurethane (FMH0.35P), achieved up to 351.2 mg g−1 Mn(II) removal capacity by Langmuir isotherm model. Besides, FMHP exhibited high Mn(II) removal in a wide range of NaCl concentration (0~0.1 M) and pH 2–9. Notably, through consecutive kinetics, BET, XPS, XRD, FESEM, and TEM analyses, it was found that the MnOx layer grows in-situ via ion exchange with Mg(II) on FMHP and further boosts the Mn(II) removal via catalytic oxidation during the Mn(II) removal process. Further, column experiments revealed that the FMH0.35P exhibited superior Mn(II) removal capacities up to 135.9 mg g−1 and highly compatible treatment costs ($0.062 m−3) compared to conventional chemical processes. The granular-sized FMH0.35P prepared by economic precursors and simple synthesis route revealed a high potential for Mn(II) containing water treatment due to its high removal capacities and easy operation.
KW - Catalytic oxidation
KW - Manganese removal
KW - Mg(OH)
KW - Polyurethane
UR - http://www.scopus.com/inward/record.url?scp=85115771801&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2021.127267
DO - 10.1016/j.jhazmat.2021.127267
M3 - Article
C2 - 34583162
AN - SCOPUS:85115771801
SN - 0304-3894
VL - 424
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 127267
ER -