Rosa Icela Beltrán Hernández

Por qué deben tratarse las aguas residuales

Some people think that any discharge to a body of water is pollution. With current systems for transporting and conducting wastewater generated in homes and industries, it would be almost impossible and unwise to ban the discharge of these wastes into the oceans, rivers and groundwater basins. According to their origin, wastewaters are classified as domestic and industrial. Also, depending on the waste present are classified as organic and inorganic wastewater. There are rare residues such as discharges from cooling processes (leading to thermal changes) and radioactive waste, mainly from hospitals, research laboratories, and nuclear power plants. Not treating wastewater produce adverse effects on human health and the environment. Nowadays various technologies can be used to treat wastewater, known as primary, secondary and tertiary treatments. In Mexico, there are Mexican laws that regulate wastewater and treated water discharges to a water bodies, soils, and municipal urban sewer systems, etcetera. Water resource protection is everyones responsibility.

Evaluación de ozono ambiental en el municipio de Mineral de la Reforma, Hidalgo

Ozone (O3) is present in different layers of the atmosphere: in the stratosphere, it acts as a filter for ultraviolet radiation emitted by the sun; while in the troposphere, it is a harmful pollutant for living organisms, and it is also a precursor gas of greenhouse effect. The objective of this study was to evaluate the hourly variations in the concentration of O3 in the municipality of Mineral de la Reforma, Hidalgo, for this we use colorimetric detectors prepared with a starch / KI solution. Cristian Alain Briones et al. / Publicación Semestral Pädi No. 11 (2018) 8–11 11 The results obtained by the exposure of the detectors to the O3 in the study area showed that the maximum concentration of this gas occurred at 12h00, with an average temperature of 18.5°C and a relative humidity between 16 and 20%.