Eliminación de contaminantes por fotocatálisis heterogénea, M.A. Blesa y B. Sánchez (Editores), Editorial CIEMAT, Madrid , ISBN: Get this from a library! Eliminación de contaminantes por fotocatálisis heterogénea. [Miguel A Blesa; CYTED (Organización);]. Get this from a library! Eliminación de contaminantes por fotocatálisis heterogénea. [Miguel Blesa;].
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It has been used along with other conventional techniques, achieving increases in chemical kinetics and a more efficient pollution removal.
In particular, RB5 was removed by The reaction was monitored every 2 h. A review of fundamentals, progress and problems. The cytotoxicity test was done in the 10 th and 21 st trials, as those had the best decolorization percentages.
Carrera 30 No Photocatalytic degradation of azo dye reactive orange 16 by TiO2. First-order kinetics for RB5 decolorization, under the conditions of test 15 0. Besides, the cytotoxicity analysis has not carried out in most of the studies on this topic, but this type of analysis is important to determine the environmental impact of the treated water.
Thus, it may be preferable to use low amounts of it to reduce operating costs. Treatment of high organic carbon industrial wastewater using photocatalysis process.
Revista Colombiana de Química
TiO 2 concentration 0. Recent overview and trends. Based on the results obtained in the optimization, it is possible to conclude that the catalyst loading is not a determinant of the decolorization process. Photocatalytic Degradation of Textile Azo Dyes. Evaluation of Titanium dioxide photocatalytic technology for the treatment of reactive Black 5 dye in synthetic and real greywater effluents.
The total area was obtained by summing the area of the trapezoids under the curve, which is formed between pairs of decolorization percentage readings over time The evaluated samples did not show toxicity in the HepG2 cell line.
RB5 decolorization in aqueous solution The RB5 decolorization was followed spectrophotometrically Shimadzu UV spectrophotometer at nm. Preserving and protecting natural resources, such as water, is one of the nowadays main environmental concerns. After this period, the MTT was added to the culture dishes, and after additional 3 h of incubation at the same temperature, DMSO was added.
It is concluded that the photocatalytic process presented in this work do not generate cytotoxic by-products. Additionally, other authors have reported that the degradation of azoic dyes and hetetogenea substances by heterogeneous photocatalysis, using TiO 2 and UV, light can be followed by a first-order kinetics process 19 Under this condition RB5 degradation is faster because TiO 2 particles are positively charged, so RB5 is adsorbed easier on TiO 2 as a result of the electrostatic attraction of the positively charged photocatalyst with the dye Heterogeneous photocatalytic degradation of organic contaminants over titanium dioxide: Besides, the RB5 in aqueous solution is negatively charged because it is a sulphonated dye The reaction was carried out in an aluminum photoreactor equipped with five lamps.
Heterogeneous photocatalytic degradation of reactive dyes in aqueous TiO2 suspensions: RB5 decolorization percentage in aqueous solution vs.
Methods of in vitro toxicology. Although, as reported Threrujirapapong et al. This article revises the most hetterogenea investigations related to the subject and mentions some of the advantages photocatalysis has if compared to other systems. Hence, the applied photocatalytic treatment is a viable alternative for the removal of azo dyes, since it makes it possible to achieve high decolorization percentages of RB5, with no formation of toxic products.
The chemical nature of synthetic dyes confers them resistance hetreogenea degradation by conventional methods, including sedimentation, adsorption, oxidation with sodium hypochlorite, filtration, coagulation, flocculation, and biodegradation 7. Heterogeneous photocatalysis is an effective process for degrading and mineralizing of pollutants in waste water from several sources.
Conventional water treatments with surfactants are made by a biological action during the primary sedimentation. The biological evaluation is presented in Figure 7.
Fotocatálisis heterogénea para el abatimiento de tensoactivos aniónicos en aguas residuales
From the above, it is possible to conclude fotocxtalisis the catalyst load used in the optimization tests is not a determining factor in the improvement of the process productivity Figures 5 and 6.
Decolorization percentage of RB5 for 14 h. Application of solar energy in water treatment processes: TiO2 optimization tests for RB5 decolorization. Another possible cause for such results is the UV-screening effect of the dye itself.