DECRETO DE (Diciembre 30) Diario Oficial No. parcialmente la prevención y el manejo de los residuos o desechos peligrosos generados en el. Según el Decreto de , un Residuo o Desecho Peligroso es aquel residuo sistema de gestión de residuos peligrosos generados en la Universidad. Teniendo en cuenta el decreto del del manejo de Residuos Peligrosos (RESPEL.) responda las siguientes preguntas y enviar sus respectivas.

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L -1thereby complying with Colombian regulations. The sludge generated during Ag and Hg precipitation had pH lower than 2, these being toxic and corrosive characteristics of COD residue. This result showed that the ferric hydroxides Fe OH 3 at pH 8. These bricks were subjected to mechanical resistance and leaching tests to identify if they obey quality and environmental standard.

Chemical modification and desorption studies. L -1 of NaCl independently of initial Ag concentrations. The liquid residues from COD analysis used in this study were obtained from the Universidad del Valle’s Sanitary and Environmental Engineering Department’s environmental technology lab sample 1watier and environmental residues lab sample 2 and environmental chemistry lab sample3.

The filtrated upper layer from the mercury precipitation, diluted with the optimal ratio found in the previous experiment, was subjected to a jar test to determine optimal FeCl 3 dosage.

Journal of Hazardous Materials. Final Cr III concentration in the jar test after 1 hour of precipitation was less than 0. The parameters analysed in this study were pH, heavy metal concentration Ag, Hg and Cr and settling solids.

Decreto de by Yessica Pavi Tabares M.A on Prezi Next

Leong Leong et al. The reaction time in which maximum Cr VI reduction was achieved varied and depended on several factors such as the samples’ source. Due to the variable characteristics of the COD residue samples and the experimental results, it was determined that a 50 to 60 minute reaction time was needed to obtain a final Cr VI concentration of less than 0.


How to cite item. L -1required 50 minutes time to obtain a similar reduction. Effect of organic content in biosolids on the properties of firedclay bricks incorporated with biosolids. Fast settling of the heavier solids was observed when the mixture was placed in the Imhoff cone, leaving a suspension of fine particles that required a longer time to precipitate. Glucose added as easily oxydable organic material allowed reducing Cr VI to less than 0.

Phenolic compounds within banana peel and their potential uses: The simulation of fast and slow mixing conditions during Cr III precipitation produced Fe and Cr metallic hydroxides having improved sedimentation characteristics, reducing settling time to h with Cr concentrations in the upper layer of less than 0. Its wastes are considered hazardous due to the content of metals such as Cr, Ag and Hg; treating these wastes is considered complex and expensive.

L -1 can be obtained Banfalvi, Student,Universidad del Valle, Cali, Colombia. Mercury precipitation Hg 10 g of iron sulphide FeS per litre of residue was added to the free Ag ions in the supernatant. COD analysis is often carried out in environmental labs.

Electrochemical reduction of hexavalent chromium on titania nanotubes with urea as ananolyte additive. The mixture was stirred for 2 h, precipitated sludge volume was measured resiruos an Imhoff cone and the supernatant was measured for final Hg concentration. Sorption-desorption cycles were performed in order to analyze the biosorbent useful decreo. Utilization of banana peels for removal of strontium II from water. This dosage has been reported by Lopez to guarantee the formation of AgCl 2 due to the excess of Cl – in the solution.

The precipitated sludge volume was measured with an Imhoff cone. Environmental Technology and Innovation.


Armas E, Guevara A.

decreto 4741 de 2005 residuos peligrosos pdf converter

L decteto for samples 1, 2 and 3, respectively. The cost involved in the chemical treatment can become significantly reduced by using readily available reactants due to their common use in chemical analysis.

Around 15 mL of sludge was generated per litre of treated sample. The maximum temperature was Email this article Login required. Ukwatta P, Mohajerani A. Sludge having the residue’s characteristics was produced during each precipitation stage. Dosages equal re or higher than mg.

A considerable amount of suspended solids were observed during this decreot. Conclusion Glucose added as easily oxydable organic material allowed reducing Cr VI to less than 0. Bearing in mind that the same result was obtained with no addition of ferric chloride, it was inferred that this substance had no effect on Cr III precipitation in the experimental conditions used here.

Email the author Login required. Precipitation tests with ferric chloride FeCl 3 were carried out to improve the quality of the supernatant and decrease precipitation time. The sludge generated in each precipitation step was dehydrated at room temperature. Chemical precipitation The sequence of Ag, Hg, and Cr ion precipitation was carried out as follows. All the experiments were carried out with constant stirring to guarantee good mixing in the reaction vessel.

L -1, in a 60 minute reaction time. Indian Society of Education and Environment No: The ratio between generated dry residue and COD-treated residue volume was determined. Figure 2 shows the Ag concentrations for the samples analysed resuduos.