Desarrollo de un filtro de hueso anorgánico de bovino para la adsorción de arsénico en agua tratada del sector de Toacaso-Cotopaxi.

Abstract

The objective of the present research was to develop an inorganic bovine bone filter, as an adsorbent, to remove arsenic from the treated water of Toacaso-Ecuador. Using bovine diaphysis dry and without fabrics, ground and sieved the material. The 63-micron particles were calcined at 450 ° C, 600 ° C and 750 ° C. The adsorption was evaluated in samples of 50 mL of water taken from the public network (arsenic concentration = 0,306 mg · L-1) in a Batch type reactor under mechanical agitation at three different times (10, 20, 30 min) and three different masses (0,1; 0,2; 0,3 g) of inorganic bone calcined. The bone sample with the highest adsorption was characterized by Fourier transform infrared spectrometry, X-ray diffraction and scanning electron microscopy. Arsenic quantification was performed by atomic absorption spectrophotometry. The sample calcined at 600 ° C using 0,2 g for 20 min of stirring at 150 rpm gave the best results. A cylindrical filter with a purification capacity of 10 L · day-1 was built and installed in a home, containing the material with the highest adsorption capacity. With the removing of 67,97% of arsenic, it was insufficient and evidencing the need to get a filter with inorganic bone content obtained at another calcination temperatures.