El objetivo de esta investigación fue obtener sulfato de hierro(III) a partir de la precipitación selectiva del drenaje ácido de mina para ser utilizado como coagulante en el tratamiento de agua. La posibilidad de la precipitación selectiva se sustenta en los diagramas de precipitación. Se obtuvo el sulfato de hierro(III) mediante la precipitación selectiva de una muestra sintética de drenaje ácido de mina, separando previamente el cobre y zinc. El pH en un rango de 3 a 4 y la concentración del ácido sulfúrico en el rango de 30 a 40 % fueron las variables significativas a diferencia de la humedad y el tiempo de solubilidad del hidróxido de hierro(III) que no son significativas de acuerdo con el modelo de Taguchi. Mediante las pruebas de sedimentación batch, utilizando como coagulante el sulfato de hierro(III), se logra la primera etapa de tratamiento del agua a través de la...

When we refer to pain, we are faced with an unpleasant sensation that causes certain reactions in the human body that prevent its production, so it is of vital importance to understand what the symptomatology of pain is, how it is produced and how it can be avoided. production, there are cases where the pain becomes pathological where found in the patient's thoughts, therefore the present work tries to demonstrate that its production can be avoided in the face of intense painful situations that occur when working in the recovery of the mobility of the patient. articulation of the knee, which by its nature is painful, added to the fear of feeling pain on the part of the patient does not help the patient's recovery, the experimentation consists of taking the pain from the approach of not thinking about it and relaxing and evaluating it by an environment of cerebral analysis through the lev...

In the evaluation of terrestrial coverage by means of remote sensors, we find a variety of techniques dedicated to be able to register the terrestrial coverage, one of them is the use of optical satellite images also known as multispectral images, these images are formed by different bands of spectral that depend on the optical sensor of the observation satellite, among the known bands we have: Panchromatic, Red, Green, Blue, Near Infrared, among others. The analysis of multispectral images is based on the grouping of these spectral bands, forming color images by grouping three spectral bands; One of the disadvantages presented by optical images in the acquisition is the presence of cloud cover that prevents the registration of land cover. Another of the techniques used is the use of the images provided by the Synthetic Aperture satellites, better known as radar images (SAR). These image...

A local integrated assessment of the vulnerability and adaptation to climate change in the Mantaro River Basin, located in Peruvian Central Andes, was developed between years 2003 to 2005. In this paper we present some lessons learned during the development of this study, emphasizing the multi-institutional and interdisciplinary efforts, briefly showing the methodological aspects, and pointing out the main problems found.