Recuperación de Cromo (III) mediante los métodos de electrocoagulación y precipitación en la empresa Tenería Díaz

Abstract

The objective of this research was to recover Chromium (III) by means of electrocoagulation and precipitation methods in the company Tenería Díaz. Using the residual water from the tanning stage, a physical-chemical analysis was previously carried out before the effluent was use in each of the proposed methods. A comparison was made of the physical-chemical analysis obtained based on the TULSMA Regulation. Book VI, Annex 1, Standard of environmental quality and discharge of effluents to the water resource. Table 11: Discharge limits to the public sewer system. The electrocoagulation method was carried out, by applying three treatments at 5, 10 and 15 volts in a time of 15 minutes respectively, the foam that was produced was collected in containers, which were taken to their respective analysis, which is the recovery of Chromium (III). A precipitate was carried out with Sodium Hydroxide (NaOH) at different concentrations 4 M, 5 M and undissolved, leaving in resting for 24 hours each, the precipitate was analysed to determine its respective recovery. As a result of what was done, the precipitation, not being dissolved, gave a percentage of 99.7% higher than the electrocoagulation, this type of behaviour occurs due to the chemical potential, as its concentration of NaOH is higher, therefore the precipitate will be higher. It can be concluded that the precipitation method is the optimal one for this type of treatment. The use of the precipitation method is recommended since it is a method that provides a high percentage of recovery of Chromium (III).