Degradation of waste water from textile industries by the use of photocatalysis
Journal Title: Revista Lasallista de Investigación - Year 2005, Vol 2, Issue 1
Abstract
Introduction: For dye degradation, different Technologies of tertiarty treatment have been used (nanofiltration, microfiltration, electrocoagulation), the advanced processes (H2O2/UV and heterogeneous and homogeneous photo catalysis) and combined treatments of photo catalysis and electrolytic oxidation. In many cases, the application of such technologies has brought a diminution in the concentration of dye in the treated effluents. Objective: To evaluate photo degradation sensitized with titanium dioxide for a dye used in textile industries. Materials and methods: Rehearsals were made in a parabolic composed cylinder sunlight collector, which is made up by 8 glass pipes and an aluminium sheet. This allows the reflection of ultraviolet radiation of sunlight. The device had a recirculation pump and a tank. The sunlight collector had a 6 degrees inclination with respect to the ground. The glass pipes were united with PVC connections. Assemblies were made during a 8 hours period of radication, and colour and COT analysis were made every hour. Results: Best TiO2 concentrations are 100 mg/L and 2% of H2LO2, obtaining a degradation rate of approximately 98%. Conclusions: Recoltive red dye can be degraded with good combinations between titanium dioxide and hydrogen peroxide, obtaining also good mineralization percentages in the same dye.
Authors and Affiliations
Luis Fernando Garcés Giraldo, Marta Lucía Hernández Ángel, Gustavo Antonio Peñuela Mesa
Keywords
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