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The object of this research activity was the treatment of water contaminated by the organic dye Blue Patent V, through the use of carbon nanotubes. To optimize the adsorption process, a system containing simultaneously carbon nanotubes and titanium oxide was also studied, followed by periods of exposure to sunlight for programmed times. As is known, titanium oxide is an important photo catalytic agent. In the latter case, the aim was to verify whether titanium oxide, in a first phase, could photodegrade the dye molecules into smaller components, which could subsequently be more easily adsorbed by carbon nanotubes. The system containing only carbon nanotubes proved highly efficient in reducing the concentration of dye, while the system containing carbon nanotubes and titanium oxide reported a lowering of the abatement efficiency compared to the system containing only nanotubes. [ABSTRACT FROM AUTHOR]

The waste water rejected by the textile industries is loaded with organic dyes, responsible for the high color present in the effluents. Some dyes and / or their degradation products could be carcinogenic and may have mutagenic properties. The rapid growth of the global economy has caused many environmental problems with a huge pollution problem. The abuse use of chemicals product is an environmental toxicological problem. The consequences can be serious for water resources. In this perspective, our study comes to participate with new means of depollution using new materials with interesting properties in the treatment of pollution. Among these materials, LDHs whose synthesis is easy and inexpensive can be a tool in the treatment of water Polluted [1]. Our contribution consists in using HDL as a means of sorption of dyes which are considered as polluting agents of waters especially for the industry textile. This study considers the removal of the Alizarine Red S (AR) from water on calcined MgAl, ZnAL and MgZnAL-layered double hydroxides. The different LDH was prepared by copreprecipation method. The materials was obtained for molar ratios R =2 for the different LDH. The carbonated layered Calcination of these solids leads to the formation of mixed oxides which have the property of being able to be regenerated by adsorbing new anionic entities. Adsorbents and adsorption products were characterized by physicochemical techniques. The structural characterization of the material was carried out by X-ray diffraction, infrared spectroscopy (FTIR). Dosages of the polluted solutions were monitored by UV-Visible spectrometry. [ABSTRACT FROM AUTHOR]