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Adsorption and photodegradation efficiency of TiO2/Fe2O3/PAC and TiO2/Fe2O3/zeolite nanophotocatalysts for the removal of cyanide

Title
Adsorption and photodegradation efficiency of TiO2/Fe2O3/PAC and TiO2/Fe2O3/zeolite nanophotocatalysts for the removal of cyanide
Author
전병훈
Keywords
RESPONSE-SURFACE METHODOLOGY; ADVANCED OXIDATION PROCESSES; PHOTOCATALYTIC DEGRADATION; AQUEOUS-SOLUTION; FE2O3/TIO2 NANOPARTICLES; ACTIVATED CARBON; WATER-TREATMENT; METHYL-ORANGE; WASTE-WATER; TIO2
Issue Date
2019-01
Publisher
AMER CHEMICAL SOC
Citation
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v. 58, no. 5, Page. 2099-2112
Abstract
The synthesized TiO2/Fe2O3 nanostructures supported on powder-activated carbon (PAC) and zeolite at different mole ratios of Fe3+/TiO2 were characterized by XRD, XRF, FESEM, EDX, TEM, FTIR, BET, and, PL analyses and their cyanide photodegradation mechanism was thoroughly discussed. The results confirmed not only TiO2/Fe2O3/PAC had higher photocatalytic and adsorption capability but also better structural stability and reusability for cyanide removal than TiO2/Fe2O3/zeolite. The first-order kinetics model indicated that the photodegradation rate using TiO2/Fe2O3/PAC was 1.3 times higher than that of TiO2/Fe2O3/zeolite. The response surface methodology (RSM) assessment showed that pH, irradiation time and initial cyanide concentration using UV/H2O2/TiO2/Fe2O3/zeolite system had more effects on the degradation, respectively; whereas the effectiveness of UV/H2O2/TiO2/Fe2O3/PAC process was highly influenced by initial cyanide concentration than the other two parameters. High R-2 and well-fitted residual plots approved the accuracy of the models in predicting the cyanide degradation efficiency using both the photocatalysts.
URI
https://pubs.acs.org/doi/10.1021/acs.iecr.8b05073http://repository.hanyang.ac.kr/handle/20.500.11754/104043
ISSN
0888-5885; 1520-5045
DOI
10.1021/acs.iecr.8b05073
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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