Rapid visible-light degradation of EE2 and its estrogenicity in hospital wastewater by crystalline promoted g-C3N4
| Autor: | Hadas Mamane, Dror Avisar, Yifaat Betzalel, Lakshmi Prasanna, Vinod Kumar |
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| Rok vydání: | 2020 |
| Předmět: |
021110 strategic
defence & security studies Environmental Engineering Materials science Diffuse reflectance infrared fourier transform Health Toxicology and Mutagenesis 0211 other engineering and technologies Graphitic carbon nitride Infrared spectroscopy 02 engineering and technology 010501 environmental sciences 01 natural sciences Pollution chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Specific surface area Environmental Chemistry Fourier transform infrared spectroscopy Photodegradation High-resolution transmission electron microscopy Waste Management and Disposal 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Journal of Hazardous Materials. 398:122880 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2020.122880 |
| Popis: | Metal-free, chemically activated crystalline graphitic carbon nitride (g-C3N4) nanorods with enhanced visible-light photoactivity demonstrated rapid photodegradation of 17α-ethinylestradiol (EE2) in water and real hospital wastewater. Pure g-C3N4 and another three crystalline promoted g-C3N4 photocatalysts developed by hydrothermal method were characterized by, High-Resolution Transmission Electron Microscopy (HRTEM), X-ray diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), Photoluminescence (PL), Electron spin resonance (ESR), X-ray Photoelectron Spectroscopy (XPS) and Diffuse Reflectance Spectroscopy (DRS). Hydrothermal-based chemical activation did not alter the crystal structure, functional group or surface morphology, but it enhanced the specific surface area of activated g-C3N4 due to intralayer delamination and depolymerization of g-C3N4. Compared to pure g-C3N4, the activated g-C3N4-3 demonstrated efficient degradation of EE2 ( O2− via reduction of O2 with photogenerated electrons. Proposed and derived mechanism for photodegradation of EE2 by g-C3N4-3 using gas chromatography-mass spectrometry (GC MS). Yeast Estrogen Screen (YES) was performed to evaluate the estrogenicity of treated water samples. Efficient removal of EE2 estrogenic activity ( |
| Databáze: | OpenAIRE |
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