Intercuenca Alto Apurímac se ubica en la sierra sur del Perú´ que comprende par te de las regiones de Cusco, Apurímac y Arequipa. Es una de las áreas afectadas, con mayor frecuencia, por una variedad de eventos extremos de sequías e inundaciones. Esta investigación está dedicada a evaluar la distribución espacial y temporal de clases de sequías e inundaciones a través del método denominado Índice de China Z, que comprende el periodo 1986 a 2015, a través de datos de precipitación observada y satelital en la Intercuenca Alto Apurímac. Los resultados indicaron que la serie de datos satelitales entre 1998 a 2015 son lo suficientemente robustas y similares como para representar las características estadísticas de la serie de datos observa- dos para un periodo largo 1986 a 2015. La presencia de sequías meteorológica con mayor frecuencia de ocurrencia interanual fueron cua...

Metals are transported, spatially and temporally, through the ground surface and the atmosphere, generating environmental and social problems in populations located in the hydrographic basins. The present study aimed to determine sources and metal levels in water sediments in the micro-basin of the Huancaray river in Apurímac region (Peru), using the X-ray fluorescence analysis technique (XRF) during the dry and rainy season of 2018 and 2019. The elements detected were K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, As, Br, Rb, Sr, Y, Zr, Nb and Ba. At each point and sampling period, critical elements have been found, as Zn, Cr, Cu, Pb, Ni and As; concentrations are above permissible limits; likewise, in the rainy and dry seasons there are no significant differences, while the main sources of pollution are populated centers; agricultural practices; presence of illegal mining; and source o...

The removal of heavy metals from wastewater is an environmental challenge which demands the use of environmentally friendly materials that promote a circular economy. This study aimed to apply a novel composite of an activated nanoclay/hydrocolloid in the removal of heavy metals from wastewater. A composite blended under pressure was prepared with spray-dried hydrocolloid derived from Nostoc sphaericum algae and activated nanoclay in an acid medium and 1M NaCl. The composite and components were analyzed through infrared (IR), X-ray (XR), ζ potential, cation exchange capacity (CEC), particle size, and SEM images. The composite was subjected to the adsorption of heavy metals (Pb, As, Zn, and Cd) at pH 4.5 and the removal percentage, kinetics, and adsorption isotherms were evaluated. It was observed that the activated nanoclay and the composite that presented a particle size of around 400 ...

The avocado fruit is an agro-industrial product with high export demand in Peru due to its sensory and nutritional qualities, which can be affected during storage. The study aimed to evaluate the effect of the application of a coating formulated with potato starch (Solanum tuberosum ssp andigena), nopalmucilage (Opuntia ficus indica), and pectin on the physicochemical and physiological properties during the storage of Fuerte and Hass avocados. Samples were taken in their harvest state from the plantation in “Occobamba”, which is cultivated by the Avocado Producers Association in Chincheros, Apurímac, Peru. Physicochemical properties (titratable acidity, pH, total soluble solids) and physiological properties (weight loss, firmness, and color L* a* b*) were determined during 20 days of storage at 20 C. The elaborated films present high transparency and low aw values. In the coated avo...