Hybrid reactor based on hydrodynamic cavitation, ozonation, and persulfate oxidation for oxalic acid decomposition during rare-earth extraction processes

Jongbok Choi; Mingcan Cui; Yonghyeon Lee; Junjun Ma; Jeonggwan Kim; Younggyu Son; Jeehyeong Khim

doi:10.1016/j.ultsonch.2018.12.004

Hybrid reactor based on hydrodynamic cavitation, ozonation, and persulfate oxidation for oxalic acid decomposition during rare-earth extraction processes

Jongbok Choi, Mingcan Cui, Yonghyeon Lee, Junjun Ma, Jeonggwan Kim, Younggyu Son, Jeehyeong Khim

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

Abstract

A cost-effective method for treating oxalic acid (OA) during rare-earth extraction was developed using hydrodynamic cavitation (HC), ozone (O₃), and persulfate (PS) (HC@PS@O₃ process). The results showed that the optimal inlet pressure during HC was 5.10 kg cm⁻² with an orifice plate diameter of 2 mm. Moreover, HC was shown to activate PS, providing an alternative activation method to base or heat as an ultrasound activation method for chemical oxidation. O₃ was also shown to activate PS. For OA oxidation using the HC@PS@O₃ process, the optimum pH was 3 and the reaction rate increased with increasing temperature. Further, the activation energy was 36.69 kJ mol⁻¹. The mechanisms unveiled in this study will allow optimization of the HC@PS@O₃ process as a chemical oxidation technology. The kinetic investigation and economic evaluation of the HC@PS@O₃ process can be used as the basis for real wastewater treatment processes in the future.

Original language	English
Pages (from-to)	326-335
Number of pages	10
Journal	Ultrasonics Sonochemistry
Volume	52
DOIs	https://doi.org/10.1016/j.ultsonch.2018.12.004
Publication status	Published - 2019 Apr

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

Hydrodynamic cavitation@persulfate@ozone process
Hydroxyl radical
Ozone
Persulfate
Rare-earth extraction wastewater
Sulfate radical

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Environmental Chemistry
Radiology Nuclear Medicine and imaging
Acoustics and Ultrasonics
Organic Chemistry
Inorganic Chemistry

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10.1016/j.ultsonch.2018.12.004

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title = "Hybrid reactor based on hydrodynamic cavitation, ozonation, and persulfate oxidation for oxalic acid decomposition during rare-earth extraction processes",

abstract = "A cost-effective method for treating oxalic acid (OA) during rare-earth extraction was developed using hydrodynamic cavitation (HC), ozone (O3), and persulfate (PS) (HC@PS@O3 process). The results showed that the optimal inlet pressure during HC was 5.10 kg cm−2 with an orifice plate diameter of 2 mm. Moreover, HC was shown to activate PS, providing an alternative activation method to base or heat as an ultrasound activation method for chemical oxidation. O3 was also shown to activate PS. For OA oxidation using the HC@PS@O3 process, the optimum pH was 3 and the reaction rate increased with increasing temperature. Further, the activation energy was 36.69 kJ mol−1. The mechanisms unveiled in this study will allow optimization of the HC@PS@O3 process as a chemical oxidation technology. The kinetic investigation and economic evaluation of the HC@PS@O3 process can be used as the basis for real wastewater treatment processes in the future.",

keywords = "Hydrodynamic cavitation@persulfate@ozone process, Hydroxyl radical, Ozone, Persulfate, Rare-earth extraction wastewater, Sulfate radical",

author = "Jongbok Choi and Mingcan Cui and Yonghyeon Lee and Junjun Ma and Jeonggwan Kim and Younggyu Son and Jeehyeong Khim",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

month = apr,

doi = "10.1016/j.ultsonch.2018.12.004",

language = "English",

volume = "52",

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T1 - Hybrid reactor based on hydrodynamic cavitation, ozonation, and persulfate oxidation for oxalic acid decomposition during rare-earth extraction processes

AU - Choi, Jongbok

AU - Cui, Mingcan

AU - Lee, Yonghyeon

AU - Ma, Junjun

AU - Kim, Jeonggwan

AU - Son, Younggyu

AU - Khim, Jeehyeong

PY - 2019/4

Y1 - 2019/4

N2 - A cost-effective method for treating oxalic acid (OA) during rare-earth extraction was developed using hydrodynamic cavitation (HC), ozone (O3), and persulfate (PS) (HC@PS@O3 process). The results showed that the optimal inlet pressure during HC was 5.10 kg cm−2 with an orifice plate diameter of 2 mm. Moreover, HC was shown to activate PS, providing an alternative activation method to base or heat as an ultrasound activation method for chemical oxidation. O3 was also shown to activate PS. For OA oxidation using the HC@PS@O3 process, the optimum pH was 3 and the reaction rate increased with increasing temperature. Further, the activation energy was 36.69 kJ mol−1. The mechanisms unveiled in this study will allow optimization of the HC@PS@O3 process as a chemical oxidation technology. The kinetic investigation and economic evaluation of the HC@PS@O3 process can be used as the basis for real wastewater treatment processes in the future.

AB - A cost-effective method for treating oxalic acid (OA) during rare-earth extraction was developed using hydrodynamic cavitation (HC), ozone (O3), and persulfate (PS) (HC@PS@O3 process). The results showed that the optimal inlet pressure during HC was 5.10 kg cm−2 with an orifice plate diameter of 2 mm. Moreover, HC was shown to activate PS, providing an alternative activation method to base or heat as an ultrasound activation method for chemical oxidation. O3 was also shown to activate PS. For OA oxidation using the HC@PS@O3 process, the optimum pH was 3 and the reaction rate increased with increasing temperature. Further, the activation energy was 36.69 kJ mol−1. The mechanisms unveiled in this study will allow optimization of the HC@PS@O3 process as a chemical oxidation technology. The kinetic investigation and economic evaluation of the HC@PS@O3 process can be used as the basis for real wastewater treatment processes in the future.

KW - Hydrodynamic cavitation@persulfate@ozone process

KW - Hydroxyl radical

KW - Ozone

KW - Persulfate

KW - Rare-earth extraction wastewater

KW - Sulfate radical

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AN - SCOPUS:85059940049

SN - 1350-4177

VL - 52

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EP - 335

JO - Ultrasonics Sonochemistry

JF - Ultrasonics Sonochemistry

ER -

Hybrid reactor based on hydrodynamic cavitation, ozonation, and persulfate oxidation for oxalic acid decomposition during rare-earth extraction processes

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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