Evaluation of potential for reuse of industrial wastewater using metal-immobilized catalysts and reverse osmosis

Choi, Jeong‐Yun; Chung, Jinwook

doi:10.1016/j.chemosphere.2014.12.021

Cited by 7 publications

(5 citation statements)

References 33 publications

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“…More data will be presented in our next paper (which has been submitted to the journal Chemosphere). 8 Whenever we synthesize the catalyst, we use a transformation efficiency of isopropyl alcohol to acetone of 100% in the evaluation procedure of the catalyst capability. The reason for lower H 2 O 2 addition was to reduce the operational costs in the real plant.…”

Section: The Possibility Of Adsorption Instead Of Oxidationmentioning

confidence: 99%

“…Finally, we have many other evidence of oxidation that was not provided in the manuscript. More data will be presented in our next paper (which has been submitted to the journal Chemosphere ) . Whenever we synthesize the catalyst, we use a transformation efficiency of isopropyl alcohol to acetone of 100% in the evaluation procedure of the catalyst capability.…”

Section: The Possibility Of Adsorption Instead Of Oxidationmentioning

confidence: 99%

See 1 more Smart Citation

Reply to “Comments on ‘Reuse of Semiconductor Wastewater Using Reverse Osmosis and Metal-Immobilized Catalyst-Based Advanced Oxidation Process’”

Choi

Chung

2014

Ind. Eng. Chem. Res.

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Section: The Possibility Of Adsorption Instead Of Oxidationmentioning

confidence: 99%

Section: The Possibility Of Adsorption Instead Of Oxidationmentioning

confidence: 99%

Reply to “Comments on ‘Reuse of Semiconductor Wastewater Using Reverse Osmosis and Metal-Immobilized Catalyst-Based Advanced Oxidation Process’”

Choi

Chung

2014

Ind. Eng. Chem. Res.

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“…These compounds are not completely removed by conventional wastewater treatment processes, such as reverse osmosis and biological treatment. To meet stringent water quality needs in the electronics industry, additional treatments, such as advanced oxidation processes (AOPs), have been considered [3]. AOPs utilize hydroxyl radicals with a greater oxidation potential than chemical oxidants for decomposing low molecular weight chemical oxidants for decomposing low molecular weight compounds.…”

Section: Introductionmentioning

confidence: 99%

Application of Wastewater Reuse with Photocatalyst Prepared by Sol-Gel Method and Its Kinetics on the Decomposition of Low Molecular Weight Pollutants

Chung

Gyuyoung

et al. 2020

IJERPH

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The development of immobilized photocatalyst as a strategy for problematic electronics wastewater reuse is described in this study. The strategy was to perform separate rinsing, mostly consisting of low molecular weight compounds, and to decompose them with a simple process, based on the advanced oxidation process (AOP). Extensive studies were performed on the preparation conditions of immobilized photocatalysts by sol-gel method under various amount of precursor and support, water to precursor ratio, pH, aging time, and calcination conditions. The optimized preparation conditions were chosen by measuring removal efficiencies of isopropyl alcohol as a representative target compound with supportive SEM and XRD analyses. Removal efficiencies with photocatalyst and UV irradiation in synthetic wastewater simulating electronics wastewater were evaluated over time. Removal efficiencies of alcohol, acetone, ethanol, and acetaldehyde reached 97.2%, 71.2%, 99.0%, and 99.0%, respectively, in 2 h. Reaction constants of each compound were determined by fitting experimental data to the first order kinetic equation and the trial and error method with consecutive reaction pathway. As analysis results of reaction constants, UV with prepared photocatalyst was found to be effective and the decomposition of acetone was found to be the rate-determining step. The immobilized photocatalyst developed in this study would be useful for application of wastewater reuse with high removal efficiencies, mild preparation conditions, and mechanical stability.

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“…On the one hand, the limited surface water supply in Korea caused a significant water scarcity issue demanding wastewater reuse. On the other hand, the complex composition of persistent organic compounds and higher operating expense limit application of wastewater reuse in electronics industry [1].…”

Section: Introductionmentioning

confidence: 99%

“…Only a few research studies were performed in low-strength wastewater, while most of them were in high-strength wastewater. The biological removal of TMAH in low strength electronics wastewater is challenging, because the toxicity of this chemical rendering removal of total organic carbon (TOC) to ppb levels, by existing biological treatment method such as activated sludge process [1].…”

Section: Introductionmentioning

confidence: 99%

Development of Novel Method for Immobilizing TMAH-Degrading Microbe into Pellet and Characterization Tool, for Verifying Its Robustness in Electronics Wastewater Treatment

Chung

Choi

2020

IJERPH

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This study describes an immobilization method of enriched microorganism, for robustly degrading organic compounds, including tetramethyl ammonium hydroxide (TMAH) in electronics wastewater without an increase of total organic carbon (TOC) in effluent. The enriched TMAH degrading bacteria was entrapped inside the pellets through polymerization. Polymerization conditions were optimized in terms of long-term TOC leak tests of pellet. Among several methods, a differential scanning calorimetry (DSC) analysis was found to be effective for the hands-on evaluation of stability in pellet. Stable pellets showed less than 10 J/g of curing heat by DSC analysis. This method is suitable for the optimization of polymerization conditions and controlling the quality of pellets. The removal efficiency of TMAH was over 95% and effluent concentration of TOC was below 100 ppb. The viability test results revealed that entrapped microorganisms were actively survived after five months of operations. This immobilization method is strongly suggested as a new strategy for the wastewater reuse process in low-strength electronics wastewater.

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Evaluation of potential for reuse of industrial wastewater using metal-immobilized catalysts and reverse osmosis

Cited by 7 publications

References 33 publications

Reply to “Comments on ‘Reuse of Semiconductor Wastewater Using Reverse Osmosis and Metal-Immobilized Catalyst-Based Advanced Oxidation Process’”

Reply to “Comments on ‘Reuse of Semiconductor Wastewater Using Reverse Osmosis and Metal-Immobilized Catalyst-Based Advanced Oxidation Process’”

Application of Wastewater Reuse with Photocatalyst Prepared by Sol-Gel Method and Its Kinetics on the Decomposition of Low Molecular Weight Pollutants

Development of Novel Method for Immobilizing TMAH-Degrading Microbe into Pellet and Characterization Tool, for Verifying Its Robustness in Electronics Wastewater Treatment

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