The complementary effect between biochar and ferrihydrite in sustainable Fenton-like oxidation of pollutant
Biochar (BC) and ferrihydrite (Fh) were used together in activation of H2O2 for removal of sulfamethazine (SMZ), a refractory antibiotic pollutant. The results show a complementary effect between biochar and ferrihydrite on activation of H2O2, namely biochar accelerated Fe(Ⅲ)/Fe(Ⅱ) cycle through ele...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer
2023-07-01
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| Series: | Journal of Saudi Chemical Society |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1319610323000881 |
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| Summary: | Biochar (BC) and ferrihydrite (Fh) were used together in activation of H2O2 for removal of sulfamethazine (SMZ), a refractory antibiotic pollutant. The results show a complementary effect between biochar and ferrihydrite on activation of H2O2, namely biochar accelerated Fe(Ⅲ)/Fe(Ⅱ) cycle through electron donation/transfer, while ferrihydrite enhanced the yield of •OH through a sustainable release of dissolved Fe. Thus several times more •OH was produced in the co-activated system (BC + Fh/H2O2) than either in the ferrihydrite-catalyzed Fenton-like system (Fh/H2O2) or in the biochar-activated system (BC/H2O2). Consequently, a more efficient oxidation of SMZ was observed in BC + Fh/H2O2, in which the reaction rate constant (kobs) is 30.7 times in Fh/H2O2 and 6.08 times in BC/H2O2, respectively. This research provides a simple and sustainable strategy for enhancing the efficiency of Fenton-like oxidation of pollutants. |
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| ISSN: | 1319-6103 |