[13] 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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The MTT reduction method was employed to establish the cytotoxicity of the reaction mixtures corresponding to the tests with the highest percentage of RB5 decolorization, utilizing the HepG2 cell line Simultaneous decolorization and detoxification of black reactive 5 using TiO2 deposited over borosilicate glass. Decolorization percentage of RB5 for 14 h. In contrast, in the present work, under the conditions of the 16th test 0.

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.

The water effluents are polluted heterogenes high concentrations of heavy metals, pesticides, herbicides, synthetic dyes, soaps, salts, pharmaceuticals, and personal care products 1. Results obtained for six assays: Conventional water treatments with surfactants are made by a biological action during the primary sedimentation. Photocatalysis in aqueous solutions of RB5.

Revista Colombiana de Química

Sample 1 10th test before photocatalysis, i. This presents a contribution to the ongoing discussions on dye decolorization. Contamination of water sources with dyes interferes with the photosynthetic processes of aquatic organisms and impacting the health of the population that receive contaminated water 4. Control cells without treatment.


It was determined that the decolorization process could be improved using 0. Furthermore, it was observed that the degradation of 50 mg L -1 of RB5 using 0. Heterogeneous photocatalysis for the abatement of anionic surfactants in waste water. A review of fundamentals, progress and problems. The reaction was monitored every 2 h. The chemical nature of synthetic dyes confers them resistance to degradation by conventional methods, including sedimentation, adsorption, oxidation with sodium hypochlorite, filtration, foticatalisis, flocculation, and biodegradation 7.

For best interpretation, see Table 3. Thereby, six additional trials independent to the experimental design were proposed, being stricter concerning to TiO 2 concentration see tests 16—21, in Table 2. The RB5 photocatalytic decolorization was performed in an aluminum photoreactor R.

Heterogeneous photocatalytic methodologies are based on the band model. This characteristic of TiO 2 would allow treating several loads of RB5 using the same catalyst, and therefore a system of continuous degradation could be implemented. The highest decolorization percentage of RB5 TiO 2 concentration 0. Besides, the RB5 in aqueous solution is negatively charged because it is a sulphonated dye The RB5 decolorization was followed spectrophotometrically Shimadzu UV spectrophotometer at nm.

Also, there are several studies related to synthetic dyes with cases of toxicity, carcinogenesis, mutagenesis, and teratogenesis in humans 5. Treatment of high organic carbon industrial wastewater using hetrrogenea process.

For the two test controls with TiO 2 and without UV light, and with UV light but TiO 2 freethere were no changes, as the dye oxidation is mainly mediated by the action of the TiO 2 semiconductor in the presence of UV light, which activates the catalyst. Adsorption of methylene blue on low-cost adsorbents: Under the conditions of the 10 th 0.


Fotocatálisis heterogénea para el abatimiento de tensoactivos aniónicos en aguas residuales

Reactive Black 5 RB5 is an azo dye widely used in the textile industry because of its high chemical stability. Complete decolorization of RB5 was obtained at 14 h, employing 0.

Although, as reported Threrujirapapong et al. Besides, the cytotoxicity analysis has not carried out in most of the studies heterogejea this topic, but this type of analysis is important to determine the environmental impact of the treated water.

Detoxification of waters contaminated with phenol, formaldehyde and phenol—formaldehyde mixtures using a fotocatlisis of biological treatments and advanced oxidation techniques. Kinetic and mechanistic investigations: Though, as mentioned above it is important to note that the concentrations of dye used in the present study 50 mg L -1 are higher than those reported by hheterogenea authors; therefore, it would take more time to remove dyes 14 h. This article revises the most important investigations related to the subject and mentions some of the advantages photocatalysis has if compared to other systems.