Heavy metals and organic dyes removal using zinc oxide particles
| dc.contributor.author | Maizatul Syima Nur Binti Noraini | |
| dc.date.accessioned | 2021-08-04T03:18:55Z | |
| dc.date.available | 2021-08-04T03:18:55Z | |
| dc.date.issued | 2016-06 | |
| dc.description.abstract | In this project, semiconductor photocatalysts are known to be able to remove heavy metals from water by adsorption. However, they lost their adsorption capability after a period of time. ZnO nanorods and ZnO nanodisks were successfully synthesized by solution precipitation method. The EDX analysis indicates that the ZnO nanorods are Zn-rich (or oxygen deficient) as compared to the stoichiometric. While, ZnO nanodisks consist of others elements beside Zn and O such as Al, N and S. The photocatalytic activity for heavy metal removal, Copper (II) sulphate solution was achieved using ZnO nanorods, ZnO nanodisks and TiO2 nanoparticle (as reference) under UV and visible light. ZnO nanorods were the best photocatalyst. Next, the ZnO nanorods were used to remove others heavy metal such as Cu, Ni and Mn. The EDX analysis shows the presence of Cu, Ni and Mn on the surface of ZnO nanorods. ZnO nanorods were more efficient to remove Cu followed by Mn and Ni. After heavy metal removal process, m- ZnO nanorods (m = Cu, Ni and Mn) was produced. The photodegradation efficiency of m-ZnO nanorods was not as good as ZnO nanorods but they could still decompose the organic dye. This study suggests that m-ZnO nanorods could be used to decompose organic pollutants. Indirectly, the lifespan of these m-ZnO nanorods could be prolonged by re-using m-ZnO nanorods for degradation of organic compounds after heavy metal removal. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/13953 | |
| dc.language.iso | en | en_US |
| dc.title | Heavy metals and organic dyes removal using zinc oxide particles | en_US |
| dc.type | Other | en_US |
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