Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanism
The presence of organic compounds in the waste liquor is of serious environmental concern that has plagued the development of alumina industry (Bayer Process). The present work attempts to develop a green and efficient process for removal of organics utilizing combined effect of sonolysis and ozonat...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-08-01
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| Series: | Ultrasonics Sonochemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417722002012 |
| _version_ | 1818180067309649920 |
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| author | Jianfeng Ran Haisheng Duan C. Srinivasakannan Jiashu Yao Shaohua Yin Libo Zhang |
| author_facet | Jianfeng Ran Haisheng Duan C. Srinivasakannan Jiashu Yao Shaohua Yin Libo Zhang |
| author_sort | Jianfeng Ran |
| collection | DOAJ |
| description | The presence of organic compounds in the waste liquor is of serious environmental concern that has plagued the development of alumina industry (Bayer Process). The present work attempts to develop a green and efficient process for removal of organics utilizing combined effect of sonolysis and ozonation (US/O3). The effects of reaction duration, ozone concentration and ultrasonic power are assessed for sonolysis (US), ozonation (O3) and combination of sonolysis and ozonation (US/O3). The optimal conditions for US/O3 treatment system is identified to be a reaction duration of 7 h, ozone concentration of 7.65 g/h, and ultrasonic power of 600 W. The total organic carbon (TOC) removal and decolorization are 60.13% and 87.1%, respectively. The process can be scaled-up to industrial scale, which could potentially serve to be a convenient, safe and sustainable alternative to the exisiting treatment technologies. Additionally, the treated waste water can be reused contributing to an improvement in the overall economics. |
| first_indexed | 2024-12-11T21:13:52Z |
| format | Article |
| id | doaj.art-d885c915f4bf4ac3953ae8e5d6527d64 |
| institution | Directory Open Access Journal |
| issn | 1350-4177 |
| language | English |
| last_indexed | 2024-12-11T21:13:52Z |
| publishDate | 2022-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj.art-d885c915f4bf4ac3953ae8e5d6527d642022-12-22T00:50:39ZengElsevierUltrasonics Sonochemistry1350-41772022-08-0188106106Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanismJianfeng Ran0Haisheng Duan1C. Srinivasakannan2Jiashu Yao3Shaohua Yin4Libo Zhang5Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, ChinaFaculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Yunnan Wenshan Aluminum Co., Ltd., Wenshan, Yunnan 663000, ChinaChemical Engineering Department, Khalifa University of Science and Technology, Abu Dhabi, United Arab EmiratesFaculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, ChinaFaculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Corresponding authors at: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Corresponding authors at: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.The presence of organic compounds in the waste liquor is of serious environmental concern that has plagued the development of alumina industry (Bayer Process). The present work attempts to develop a green and efficient process for removal of organics utilizing combined effect of sonolysis and ozonation (US/O3). The effects of reaction duration, ozone concentration and ultrasonic power are assessed for sonolysis (US), ozonation (O3) and combination of sonolysis and ozonation (US/O3). The optimal conditions for US/O3 treatment system is identified to be a reaction duration of 7 h, ozone concentration of 7.65 g/h, and ultrasonic power of 600 W. The total organic carbon (TOC) removal and decolorization are 60.13% and 87.1%, respectively. The process can be scaled-up to industrial scale, which could potentially serve to be a convenient, safe and sustainable alternative to the exisiting treatment technologies. Additionally, the treated waste water can be reused contributing to an improvement in the overall economics.http://www.sciencedirect.com/science/article/pii/S1350417722002012OrganicsBayer liquorSonolysisOzonationUS/O3AOPs |
| spellingShingle | Jianfeng Ran Haisheng Duan C. Srinivasakannan Jiashu Yao Shaohua Yin Libo Zhang Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanism Ultrasonics Sonochemistry Organics Bayer liquor Sonolysis Ozonation US/O3 AOPs |
| title | Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanism |
| title_full | Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanism |
| title_fullStr | Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanism |
| title_full_unstemmed | Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanism |
| title_short | Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanism |
| title_sort | effective removal of organics from bayer liquor through combined sonolysis and ozonation kinetics and mechanism |
| topic | Organics Bayer liquor Sonolysis Ozonation US/O3 AOPs |
| url | http://www.sciencedirect.com/science/article/pii/S1350417722002012 |
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