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Revista Boliviana de Química
versão On-line ISSN 0250-5460
Resumo
SALAS-MERCADO, Dante; HERMOZA-GUTIERREZ, Marián e SALAS-AVILA, Dante. Distribution of heavy metals and metaloids in surface waters and on sediments of the Crucero river, Peru. Rev. Bol. Quim [online]. 2020, vol.37, n.4, pp.185-193. ISSN 0250-5460.
Abstract The accumulation of inorganic pollutants in environmental compartments represents a serious problem worldwide, as they generally come from urban and industrial activities with inadequate waste management. Heavy metals are priority inorganic pollutants whose accumulation and distribution in freshwater bodies can make them potentially dangerous, becoming toxic when they reach living organisms that make up the food chain. The crucero river is located in the department of Puno, Peru, it converges with other rivers belonging to the Ramis Basin, whose mouth is located in Lake Titicaca. Wastewater discharges from mining, urban and rural activities are dumped into this river. For the study, the dry season was taken into account (May 2017), five sampling stations were selected along the river and the basic physical-in-situ parameters were determined, including pH, temperature, electrical conductivity and redox indexes. Samples of water and superficial sediments were collected and the concentration of heavy metals (cadmium, zinc and arsenic) present in the samples was analyzed by means of induction coupled plasma atomic emission spectroscopy The results showed that the water under scrutiny was not suitable for human consumption, a fact proven by pH values greater than 8.5, which do not comply with the regulations established by the world health organization (WHO). On the other hand, the concentration value of metals in water does not exceed national environmental quality standards or the values of criteria external to the country; however, there is certainty of contamination with arsenic, cadmium and zinc in sediments under the national and international regulations scope.
Palavras-chave : Heavy Metals; Metaloids; Pollution; Physicochemical Parameters; River.
