Next Article in Journal
A Taxonomy Proposal for the Assessment of the Changes in Soundscape Resulting from the COVID-19 Lockdown
Previous Article in Journal
Artificial Neural Network Modeling of Novel Coronavirus (COVID-19) Incidence Rates across the Continental United States
Open AccessArticle

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

1
R&D Center, Samsung Engineering Co. Ltd., 41 Maeyoung-Ro, 269 Beon-Gil, Youngtong-Gu, Suwon, Gyeonggi-Do 16523, Korea
2
Department of Chemical and Molecular Engineering, Hanyang University, 55 Hanyangdaehakro, Sangrok-Gu, Ansan, Gyeonggi-Do 15588, Korea
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(12), 4203; https://doi.org/10.3390/ijerph17124203
Received: 21 May 2020 / Revised: 10 June 2020 / Accepted: 11 June 2020 / Published: 12 June 2020
(This article belongs to the Section Environmental Science and Engineering)
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. View Full-Text
Keywords: electronic wastewater; low-molecular-weight (LMW) compounds; photocatalytic media; sol-gel method electronic wastewater; low-molecular-weight (LMW) compounds; photocatalytic media; sol-gel method
Show Figures

Figure 1

MDPI and ACS Style

Chung, J.; Chung, S.; Lee, G.; Lee, Y.-W. Application of Wastewater Reuse with Photocatalyst Prepared by Sol-Gel Method and Its Kinetics on the Decomposition of Low Molecular Weight Pollutants. Int. J. Environ. Res. Public Health 2020, 17, 4203.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop