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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...

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Autores principales: Ran, Jianfeng, Duan, Haisheng, Srinivasakannan, C., Yao, Jiashu, Yin, Shaohua, Zhang, Libo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9352555/
https://www.ncbi.nlm.nih.gov/pubmed/35921714
http://dx.doi.org/10.1016/j.ultsonch.2022.106106
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author Ran, Jianfeng
Duan, Haisheng
Srinivasakannan, C.
Yao, Jiashu
Yin, Shaohua
Zhang, Libo
author_facet Ran, Jianfeng
Duan, Haisheng
Srinivasakannan, C.
Yao, Jiashu
Yin, Shaohua
Zhang, Libo
author_sort Ran, Jianfeng
collection PubMed
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/O(3)). The effects of reaction duration, ozone concentration and ultrasonic power are assessed for sonolysis (US), ozonation (O(3)) and combination of sonolysis and ozonation (US/O(3)). The optimal conditions for US/O(3) 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.
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spelling pubmed-93525552022-08-06 Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanism Ran, Jianfeng Duan, Haisheng Srinivasakannan, C. Yao, Jiashu Yin, Shaohua Zhang, Libo Ultrason Sonochem Short Communication 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/O(3)). The effects of reaction duration, ozone concentration and ultrasonic power are assessed for sonolysis (US), ozonation (O(3)) and combination of sonolysis and ozonation (US/O(3)). The optimal conditions for US/O(3) 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. Elsevier 2022-07-29 /pmc/articles/PMC9352555/ /pubmed/35921714 http://dx.doi.org/10.1016/j.ultsonch.2022.106106 Text en © 2022 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Short Communication
Ran, Jianfeng
Duan, Haisheng
Srinivasakannan, C.
Yao, Jiashu
Yin, Shaohua
Zhang, Libo
Effective removal of organics from Bayer liquor through combined sonolysis and ozonation: Kinetics and mechanism
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 Short Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9352555/
https://www.ncbi.nlm.nih.gov/pubmed/35921714
http://dx.doi.org/10.1016/j.ultsonch.2022.106106
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