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α-Fe2O3 catalyst supported on rice husk ash (RHA) with enhanced photochemical NO oxidation is reported. The Fe2O3/SiO2 composites are prepared through the calcination of RH and FeCl3 at temperatures of 600 and 900 °C, during 1 and 4 h. Fe2O3 crystalizes covering the cob-shaped silica skeleton. The thermal procedure determines the mineralogical composition, crystalline growth and surface area of samples...
The following paper describes the design, implementation and preliminary tests of an Unmanned Surface Vessel (USV) robot, able to collect water quality parameters and bathymeter measurements in lakes and bodies of fresh water at the Peruvian highlands. The USV robot is developed in order to be a measurement tool to monitor water pollution and help to improve the current methods used for this task...
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