Wet oxidation and catalytic wet oxidation of pharmaceutical sludge
Abstract In this work, wet oxidation and catalytic wet oxidation of pharmaceutical sludge using homogeneous and heterogeneous catalysts were investigated. The results indicate that wet oxidation is a promising method for the highly efficient degradation of pharmaceutical sludge. Under optimal condit...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-02-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-22847-0 |
| _version_ | 1827984621304807424 |
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| author | Xu Zeng Jun Liu Jianfu Zhao |
| author_facet | Xu Zeng Jun Liu Jianfu Zhao |
| author_sort | Xu Zeng |
| collection | DOAJ |
| description | Abstract In this work, wet oxidation and catalytic wet oxidation of pharmaceutical sludge using homogeneous and heterogeneous catalysts were investigated. The results indicate that wet oxidation is a promising method for the highly efficient degradation of pharmaceutical sludge. Under optimal conditions, the highest removal efficiencies of volatile suspended solids (VSS) 86.8% and chemical oxygen demand (COD) 62.5% were achieved at 260 °C for 60 min with an initial oxygen pressure of 1.0 MPa. NaOH exhibited excellent acceleration performance on the VSS removal. The highest VSS removal efficiency of 95.2% was obtained at 260 °C for 60 min with an initial oxygen pressure of 1.0 MPa and 10 g·L−1 of NaOH. By using a Cu–Ce/γ-Al2O3 catalyst, the highest removal rates of VSS 87.3% and COD 72.6% were achieved at 260 °C for 60 min with an initial oxygen pressure of 1.0 MPa and 10 g·L−1 of catalyst. The wet oxidation reaction can be maintained itself owing to the exothermic heat. The produced low-molecular-weight carboxylic acids have potential commercial utilization as organic carbon sources in the biological wastewater treatment processes. The inorganic residues can be utilized for the building materials production. These results implied that the catalytic wet oxidation is a promising method for the volume reduction and resource utilization of pharmaceutical sludge. |
| first_indexed | 2024-04-09T23:02:19Z |
| format | Article |
| id | doaj.art-eeaa125a5b8e44b1a2faa7cedf127029 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-09T23:02:19Z |
| publishDate | 2023-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-eeaa125a5b8e44b1a2faa7cedf1270292023-03-22T10:56:36ZengNature PortfolioScientific Reports2045-23222023-02-011311810.1038/s41598-022-22847-0Wet oxidation and catalytic wet oxidation of pharmaceutical sludgeXu Zeng0Jun Liu1Jianfu Zhao2State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji UniversityState Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji UniversityState Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji UniversityAbstract In this work, wet oxidation and catalytic wet oxidation of pharmaceutical sludge using homogeneous and heterogeneous catalysts were investigated. The results indicate that wet oxidation is a promising method for the highly efficient degradation of pharmaceutical sludge. Under optimal conditions, the highest removal efficiencies of volatile suspended solids (VSS) 86.8% and chemical oxygen demand (COD) 62.5% were achieved at 260 °C for 60 min with an initial oxygen pressure of 1.0 MPa. NaOH exhibited excellent acceleration performance on the VSS removal. The highest VSS removal efficiency of 95.2% was obtained at 260 °C for 60 min with an initial oxygen pressure of 1.0 MPa and 10 g·L−1 of NaOH. By using a Cu–Ce/γ-Al2O3 catalyst, the highest removal rates of VSS 87.3% and COD 72.6% were achieved at 260 °C for 60 min with an initial oxygen pressure of 1.0 MPa and 10 g·L−1 of catalyst. The wet oxidation reaction can be maintained itself owing to the exothermic heat. The produced low-molecular-weight carboxylic acids have potential commercial utilization as organic carbon sources in the biological wastewater treatment processes. The inorganic residues can be utilized for the building materials production. These results implied that the catalytic wet oxidation is a promising method for the volume reduction and resource utilization of pharmaceutical sludge.https://doi.org/10.1038/s41598-022-22847-0 |
| spellingShingle | Xu Zeng Jun Liu Jianfu Zhao Wet oxidation and catalytic wet oxidation of pharmaceutical sludge Scientific Reports |
| title | Wet oxidation and catalytic wet oxidation of pharmaceutical sludge |
| title_full | Wet oxidation and catalytic wet oxidation of pharmaceutical sludge |
| title_fullStr | Wet oxidation and catalytic wet oxidation of pharmaceutical sludge |
| title_full_unstemmed | Wet oxidation and catalytic wet oxidation of pharmaceutical sludge |
| title_short | Wet oxidation and catalytic wet oxidation of pharmaceutical sludge |
| title_sort | wet oxidation and catalytic wet oxidation of pharmaceutical sludge |
| url | https://doi.org/10.1038/s41598-022-22847-0 |
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