Determinación del porcentaje de reducción de Cr+6 en agua provenientes de industria minera utilizando bambú y yuca como biofiltro

Abstract

The objective of this research was to determine the percentage of reduction of Cr+6 in water samples from the mining industry using bamboo and cassava as a biofilter. Two biofilters were designed using activated carbon, sand, stone, bamboo and cassava as filter resources by mans of random samples. To determine the concentrations and the percentage of removal in both treatments, the identification of the initial and final water was carried out under the parameters of Cr+6, turbidity, suspended solids, pH and electrical conductivity. Each biofilter was designed by a storage tank connected to a pipe with a stopcock, which allowed the circulation of wastewater to the biofilter and later to the collection tank for treated water. The document review technique was developed for the elaboration of the theoretical framework. In addition, for the statistical analysis, the one-factor ANOVA experimental design model was used, which made it possible to establish the significant differences between the treatments used. As a result, a significant difference was identified between the treatments with bamboo and cassava, so that there was a reduction of 38 % and 31.2 % to Cr+6, 19.2 % and 13 % to the turbidity, from 3.6 % and 2.5 % to the suspended solids, 5.9 % and 1.2 % in pH and 9.2 % and 3.4 % to the electrical conductivity of bamboo and cassava respectively. It is concluded that the treatment with bamboo is more efficient. It is recommended to carry out tests with a mixed treatment between bamboo and cassava to verify its efficiency and identify possible methods of reuse of bamboo and cassava after the Cr+6 treatment.