Improved waste water treatment by bio-synthesized Graphene Sand Composite
| Autor: | V. Poornima Parvathi, R Bhaviya Raj, M. Umadevi |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Materials science Scanning electron microscope Analytical chemistry Portable water purification Management Monitoring Policy and Law Wastewater law.invention Water Purification Adsorption X-Ray Diffraction law Spectroscopy Fourier Transform Infrared Irradiation Fourier transform infrared spectroscopy Spectroscopy Waste Management and Disposal Graphene Spectrometry X-Ray Emission General Medicine Silicon Dioxide Photocatalysis Microscopy Electron Scanning Graphite Nuclear chemistry |
| Zdroj: | Journal of environmental management. 162 |
| ISSN: | 1095-8630 |
| Popis: | The photocatalytic and antibacterial properties of graphene biosynthesized from sugar and anchored on sand particles has been focused here. The morphology and composition of the synthesized Graphene Sand Composite (GSC) was investigated by means of X-ray powder diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDAX), Fourier Transform Infra-red Spectroscopy (FTIR) and UV-Visible spectroscopy. SEM images show wrinkly edges. This is characteristic of graphenic morphology. Three types of waste water samples namely, textile waste (TW), sugarcane industrial waste water (SW) and domestic waste water from a local purification center at Kodaikanal (KWW) were collected and treated. Adsorption experiments showed effective removal of impurities at 0.2 g of GSC. Photocatalytic activity was analyzed under visible and ultraviolet irradiation. The rate constant for TW increased to 0.0032/min for visible light irradiation from 0.0029/min under UV irradiation. SW showed similar improved activity with rate constant as 0.0023/min in visible irradiation compared to 0.0016/min under UV irradiation. For KWW enhanced activity was seen only in visible light irradiation with rate constant 0.0025/min. GSC showed an inhibition zone of 20 mm against the bacterium Escherichia coli. Results suggest development of economic and effective waste water management systems. |
| Databáze: | OpenAIRE |
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