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Efficient ozonation of reverse osmosis concentrates from petroleum refinery wastewater using composite metal oxideloaded alumina
Novel Mn–Fe–Mg-and Mn–Fe–Ce-loaded alumina(Mn–Fe–Mg/Al2O3 and Mn–Fe–Ce/Al2O3) were developed to catalytically ozonate reverse osmosis concentrates generated from petroleum refinery wastewaters(PRW-ROC). Highly dispersed 100–300-nm deposits of composite multivalent metal oxides of Mn(Mn2+), Mn3+,and...
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Published in: | 石油科学:英文版 2017 (3), p.605-615 |
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Main Author: | |
Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | Novel Mn–Fe–Mg-and Mn–Fe–Ce-loaded alumina(Mn–Fe–Mg/Al2O3 and Mn–Fe–Ce/Al2O3) were developed to catalytically ozonate reverse osmosis concentrates generated from petroleum refinery wastewaters(PRW-ROC). Highly dispersed 100–300-nm deposits of composite multivalent metal oxides of Mn(Mn2+), Mn3+,and Mn4+, Fe(Fe2+)and Fe3+ and Mg(Mg2+), or Ce(Ce4+) were achieved on Al2O3 supports. The developed Mn–Fe–Mg/Al2O3 and Mn–Fe–Ce/Al2O3 exhibited higher catalytic activity during the ozonation of PRW-ROC than Mn–Fe/Al2O3, Mn/Al2O-3, Fe/Al2O3, and Al2O3. Chemical oxygen demand removal by Mn–Fe–Mg/Al2O3-or Mn–Fe–Ce/Al2O3-catalyzed ozonation increased by 23.9% and23.2%, respectively, in comparison with single ozonation.Mn–Fe–Mg/Al2O3 and Mn–Fe–Ce/Al2O3 notably promoted áOH generation and áOH-mediated oxidation. This study demonstrated the potential use of composite metal oxide-loaded Al2O3 in advanced treatment of bio-recalcitrant wastewaters. |
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ISSN: | 1672-5107 1995-8226 |