Modi-Red Mud Loaded CoCatalyst Activated Persulfate Degradation of Ofloxacin
As an abundant potentially dangerous waste, red mud (RM) requires a straightforward method of resource management. In this paper, an RM catalyst loaded with cobalt (Co-RM) was prepared by the coprecipitation method for the efficient activation of persulfate (PS). Its degradation performance and mech...
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MDPI AG
2023-08-01
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| Series: | Magnetochemistry |
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| Online Access: | https://www.mdpi.com/2312-7481/9/8/203 |
| _version_ | 1827729338399719424 |
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| author | Qu Wu Wenquan Sun Kinjal J. Shah Yongjun Sun |
| author_facet | Qu Wu Wenquan Sun Kinjal J. Shah Yongjun Sun |
| author_sort | Qu Wu |
| collection | DOAJ |
| description | As an abundant potentially dangerous waste, red mud (RM) requires a straightforward method of resource management. In this paper, an RM catalyst loaded with cobalt (Co-RM) was prepared by the coprecipitation method for the efficient activation of persulfate (PS). Its degradation performance and mechanism of ofloxacin (OFL) were investigated. The characterization results of scanning electron microscopy, X-ray diffractometer, and energy dispersive spectrometer showed cobalt was successfully loaded onto the surface of RM, and the catalyst produced could effectively activate PS. Under the conditions of 15 mg/L OFL, 0.4 g/L Co-RM, 4 g/L PDS, 3.0 pH, and 40 °C temperature, the maximum removal rate of OFL by the Co-RM/PDS system was 80.06%. Free radical scavenging experiments confirmed sulfate radicals were the main active substances in the reaction system. The intermediates in OFL degradation were further identified by gas chromatography-mass spectrometry, and a possible degradation pathway was proposed. Finally, the relationship between defluorination rate and time in the Co-RM/PDS degradation OFL system was described by the first-order kinetic equation. This work reports an economical, environmental solution to the use of waste RM and provides a research basis for the further exploration of RM-based catalysts. |
| first_indexed | 2024-03-10T23:47:29Z |
| format | Article |
| id | doaj.art-5c917ae710de4f33a7be6517c8df6293 |
| institution | Directory Open Access Journal |
| issn | 2312-7481 |
| language | English |
| last_indexed | 2024-03-10T23:47:29Z |
| publishDate | 2023-08-01 |
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| series | Magnetochemistry |
| spelling | doaj.art-5c917ae710de4f33a7be6517c8df62932023-11-19T01:57:44ZengMDPI AGMagnetochemistry2312-74812023-08-019820310.3390/magnetochemistry9080203Modi-Red Mud Loaded CoCatalyst Activated Persulfate Degradation of OfloxacinQu Wu0Wenquan Sun1Kinjal J. Shah2Yongjun Sun3College of Urban Construction, Nanjing Tech University, Nanjing 211800, ChinaCollege of Urban Construction, Nanjing Tech University, Nanjing 211800, ChinaCollege of Urban Construction, Nanjing Tech University, Nanjing 211800, ChinaCollege of Urban Construction, Nanjing Tech University, Nanjing 211800, ChinaAs an abundant potentially dangerous waste, red mud (RM) requires a straightforward method of resource management. In this paper, an RM catalyst loaded with cobalt (Co-RM) was prepared by the coprecipitation method for the efficient activation of persulfate (PS). Its degradation performance and mechanism of ofloxacin (OFL) were investigated. The characterization results of scanning electron microscopy, X-ray diffractometer, and energy dispersive spectrometer showed cobalt was successfully loaded onto the surface of RM, and the catalyst produced could effectively activate PS. Under the conditions of 15 mg/L OFL, 0.4 g/L Co-RM, 4 g/L PDS, 3.0 pH, and 40 °C temperature, the maximum removal rate of OFL by the Co-RM/PDS system was 80.06%. Free radical scavenging experiments confirmed sulfate radicals were the main active substances in the reaction system. The intermediates in OFL degradation were further identified by gas chromatography-mass spectrometry, and a possible degradation pathway was proposed. Finally, the relationship between defluorination rate and time in the Co-RM/PDS degradation OFL system was described by the first-order kinetic equation. This work reports an economical, environmental solution to the use of waste RM and provides a research basis for the further exploration of RM-based catalysts.https://www.mdpi.com/2312-7481/9/8/203red mudpersulfateofloxacindegradation pathwaydefluorination |
| spellingShingle | Qu Wu Wenquan Sun Kinjal J. Shah Yongjun Sun Modi-Red Mud Loaded CoCatalyst Activated Persulfate Degradation of Ofloxacin Magnetochemistry red mud persulfate ofloxacin degradation pathway defluorination |
| title | Modi-Red Mud Loaded CoCatalyst Activated Persulfate Degradation of Ofloxacin |
| title_full | Modi-Red Mud Loaded CoCatalyst Activated Persulfate Degradation of Ofloxacin |
| title_fullStr | Modi-Red Mud Loaded CoCatalyst Activated Persulfate Degradation of Ofloxacin |
| title_full_unstemmed | Modi-Red Mud Loaded CoCatalyst Activated Persulfate Degradation of Ofloxacin |
| title_short | Modi-Red Mud Loaded CoCatalyst Activated Persulfate Degradation of Ofloxacin |
| title_sort | modi red mud loaded cocatalyst activated persulfate degradation of ofloxacin |
| topic | red mud persulfate ofloxacin degradation pathway defluorination |
| url | https://www.mdpi.com/2312-7481/9/8/203 |
| work_keys_str_mv | AT quwu modiredmudloadedcocatalystactivatedpersulfatedegradationofofloxacin AT wenquansun modiredmudloadedcocatalystactivatedpersulfatedegradationofofloxacin AT kinjaljshah modiredmudloadedcocatalystactivatedpersulfatedegradationofofloxacin AT yongjunsun modiredmudloadedcocatalystactivatedpersulfatedegradationofofloxacin |