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Palladium-Supported Zirconia-Based Catalytic Degradation of Rhodamine-B Dye from Wastewater
- Source :
- Water, Vol 13, Iss 1522, p 1522 (2021), Water, Volume 13, Issue 11
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- The catalytic activity of Pd/ZrO2 was studied in terms of the degradation of rhodamine-B dye in the presence of hydrogen peroxide. Pd/ZrO2 was prepared by impregnation method, calcined at 750 °C and characterized by XRD, SEM and EDX. The catalyst showed good catalytic activity for dye degradation at 333 K, using 0.05 g of the catalyst during 5 h. The reaction kinetics followed the pseudo-first order kinetics. The Freundlich, Langmuir and Temkin isotherms were applied to the data and the best fit was obtained with Freundlich isotherm. Thermodynamic parameters, like ΔH, ΔG and ΔS were also calculated. The negative values of ΔH (−291.406 KJ/mol) and Gibbs free energy (ΔG) showed the exothermic and spontaneous nature of the process. The positive ΔS (0.04832 KJ/mol K) value showed suitable affinity of catalyst for dye degradation. The catalyst was very stable, active and was easily separated from the reaction mixture by filtration. It can be concluded from the results that the prepared catalyst could be effectively used in dyes degradation/removal from water subjected to further validation and use for various dyes.
- Subjects :
- Langmuir
Geography, Planning and Development
chemistry.chemical_element
02 engineering and technology
010501 environmental sciences
Aquatic Science
Heterogeneous catalysis
01 natural sciences
Biochemistry
Catalysis
Chemical kinetics
chemistry.chemical_compound
symbols.namesake
thermodynamics
Rhodamine B
Freundlich equation
TD201-500
0105 earth and related environmental sciences
Water Science and Technology
dye
Water supply for domestic and industrial purposes
Chemistry
heterogeneous catalyst
rhodamine-B
Hydraulic engineering
021001 nanoscience & nanotechnology
Gibbs free energy
symbols
0210 nano-technology
TC1-978
Nuclear chemistry
Palladium
Subjects
Details
- Language :
- English
- ISSN :
- 20734441
- Volume :
- 13
- Issue :
- 1522
- Database :
- OpenAIRE
- Journal :
- Water
- Accession number :
- edsair.doi.dedup.....2a1226d3965bc28a0c0006da456b3816