Nano CuO immobilized fly ash zeolite Fenton-like catalyst for oxidative degradation of p -nitrophenol and p -nitroaniline
| Autor: | N.L. Subbulekshmi, Esakkiappan Subramanian |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Aqueous solution
Ion exchange Process Chemistry and Technology Inorganic chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Heterogeneous catalysis 01 natural sciences Pollution 0104 chemical sciences Nitroaniline Catalysis law.invention Nitrophenol chemistry.chemical_compound chemistry law Chemical Engineering (miscellaneous) Calcination 0210 nano-technology Zeolite Waste Management and Disposal |
| Zdroj: | Journal of Environmental Chemical Engineering. 5:1360-1371 |
| ISSN: | 2213-3437 |
| Popis: | Catalytic wet peroxide oxidative degradation of p -nitrophenol (PNP) and p -nitroaniline (PNA) in aqueous solution was studied using coal fly ash converted and nano CuO fringes incorporated zeolite X material (CuO/FAZ). CuO/FAZ was synthesized by ion exchange with Cu 2+ , and subsequent calcination of zeolite. The effect of various parameters such as CuO loading, H 2 O 2 concentration, catalyst dosage, initial concentration of PNP or PNA and pH was investigated. Under the optimal condition (catalyst dose 500 mg/L, 20 ppm PNP and PNA, pH = 6.5, 2 mL H 2 O 2, room temperature) the% degradation of PNP and PNA was about 96 and 84 for 180 min reaction time respectively. The reaction intermediates were analyzed by HPLC-(-ESI)-TOF-MS spectroscopy whose result indicated the complete mineralization of PNP and PNA. Concludingly, nano CuO immobilization into FAZ and the synergic effect between them greatly improved the catalytic activity of CuO/FAZ. Hence CuO/FAZ emerged as a novel, stable, reusable heterogeneous Fenton-like catalyst. Through wet catalytic degradation of PNP or PNA, this work not only provides environmental remediation solution to such toxic pollutants, but also to the solid pollutant coal fly ash through its conversion into an efficient zeolite catalyst. |
| Databáze: | OpenAIRE |
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