In the Mantaro river basin, located in Central Peru, an agricultural activity developed, even supplying the capital of Peru. An intense mining activity took place in the headwaters of this basin, and the La Oroya Metallurgical Complex was built a century ago. Mining activity has left mining environmental liabilities, which directly impact the quality of the water and the soil. In this sense, it is very important to investigate the presence of heavy metals and identify the geochemical associations present in surface waters to assess the real impact on the environment. For this purpose, 30 water samples were analyzed, collected from the Mantaro River and the channels that derive water for irrigation and animal consumption. The samples were analyzed by ICP-MS techniques, inductively coupled plasma-mass spectrometry, and ICP-AES, inductively coupled plasma-optical emission spectrometry. For the evaluation of the main physicochemical parameters, the ECA has been used, as the environmental quality standard of Peru, according to the Ministry of the Environment (2017); while for the chemical quality of surface water, the quality standards of the WHO, World Health Organization, were taken as a reference, according to the WHO guide (2017), being the elements considered: Al, As, Mn, Pb, and Zn. Investigations results show that the waters of some sectors have concentrations of As and Pb, which exceed the standards established by WHO, and there are also some specific cases (Muqui canal) in which Al and Mn exceed the WHO standard. In the case of Zn, its concentrations are much lower than the WHO standard.
El noni (Morinda citrifolia) es un fruto que posee michas propiedades nutricionales, sin embargo, por su peculiar sabor y olor es poco aprovechado como materia prima para la creación de productos atractivos dentro del mercado, con valor agregado que mejore su palatabilidad. El objetivo de la investigación fue aprovechar las frutas del noni en la elaboración de bebida sucedánea al café como una alternativa a las bebidas cafeinadas. Para ello se utilizó un diseño estadístico de bloques completamente al azar, con tres tratamientos y las repeticiones fueron representadas por 40 penalistas que dieron sus respectivos resultados en la selección de la mejor fórmula. Todas las variables se sometieron al análisis de la varianza mediante la prueba de Tukey al 5% de probabilidad. Se sometió al tostado y molido hasta obtener una granulometría fina; se efectuaron mezclas utilizando azúcar, agua, canela y esencia de vainilla, la proporción de de noni fue 5 kg para cada tratamiento. Se preparó la bebida para la degustación determinándose la proporción de mayor aceptación, así como la caracterización sensorial. De los resultados obtenidos la muestra de mayor aceptabilidad por su agradable aroma y sabor fue la bebida del tratamiento dos, utilizando noni 5 kg, azúcar 4 kg, agua 2 litros, canela 10 g y esencia de vainilla 150 cc.
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