Examinando por Materia "Contaminantes Químicos del Agua"

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Acceso abierto
Determinación de plomo y arsénico por absorción atómica en aguas de rio para consumo humano provenientes de caños y reservorio en el anexo de Huancapuquio, distrito de Chocos provincia de Yauyos 2017
(Universidad Privada Norbert Wiener, 2018-06-06) Meza Poma, Milagros Zenobia; Lizano Gutiérrez, Jesús Víctor
The concentration of Lead (Pb) and Arsenic (As) was quantified in tap water for human consumption and in water from the central reservoir originating from the Cañete River in the Huancapuquio annex, Chocos district, Yauyos province. For this purpose, 10 tap water samples and 10 samples from different points of the central reservoir were taken for both lead and arsenic analysis. The Atomic Absorption Spectrophotometry with Graphite Furnace method was used for the quantification of the metals. It was found that the average lead concentration in the tap water samples was 11.8 µgPb/L, with a minimum concentration of 2.44 µgPb/L and a maximum of 26.31 µgPb/L. 50% of the samples exceeded the permissible parameters given by the WHO and the NTP (10 µgPb/L), indicating a risk of chronic intoxication and a public health problem. In the central reservoir, an average of 9.88 µgPb/L was found, with a minimum concentration of 2.54 µgPb/L and a maximum of 23.63 µgPb/L, and 40% of the samples exceeded the maximum permissible limits given by the WHO and the NTP. In the case of arsenic, the average concentration of the tap water samples was 3.39 µgAs/L, with a minimum value of 1.03 µgAs/L and a maximum of 10.53 µgAs/L. Only 5% of these samples exceeded the maximum permissible limits given by the WHO, and 100% did not exceed the NTP limits. Regarding the reservoir water, the average was 5.57 µgAs/L, with a minimum value of 0.72 µgAs/L and a maximum of 12.60 µgAs/L. Only 10% of these samples exceeded the maximum permissible limits given by the WHO (10 µgAs/L), and in both cases, the concentrations did not exceed the NTP limits (50 µgAs/L).
Acceso abierto
Determinación de plomo y dureza cálcica en agua de consumo humano de Caja de Agua – San Juan de Lurigancho. Febrero–Marzo 2017
(Universidad Privada Norbert Wiener, 2018-04-23) Carmona Castillo, Karina Janet; Lizano Gutiérrez, Jesús Víctor
The study aimed to determine the lead and calcium hardness in 21 samples of human drinking water in the Caja de Agua area of the San Juan de Lurigancho district from February to March 2017. The analysis was performed using Atomic Absorption Spectrophotometry with a graphite furnace. It was found that the average lead concentration in the water was 0.0046 mg Pb/L, with values ranging from 0.001 to 0.019 mg Pb/L. 19.0% of the analyzed samples exceeded the maximum permissible limit of 0.010 mg Pb/L for lead in drinking water, as established by the WHO and the Peruvian Ministry of Health's Regulation on Drinking Water Quality (DS N° 031-2010-SA). The average calcium hardness was 370.86 mg CaCO₃/L, with values ranging from 104.25 to 1173.25 mg CaCO₃/L. 28.57% of the samples exceeded the maximum permissible limit of 500 mg CaCO₃/L, also established by the WHO and the aforementioned Peruvian regulation.
Acceso abierto
Identificación del riesgo toxicológico de plomo en agua consumida por los pobladores del centro poblado rural "Guayabo", distrito de Pachacamac. Octubre –noviembre, 2019
(Universidad Privada Norbert Wiener, 2021-05-21) Pérez Maraví, Ana Isabel; Llahuilla Quea, José Antonio
The objective of this research thesis was to identify the toxicological risk of lead in water consumed by the residents of the 'Guayabo' rural town center in the Pachacámac district. The Atomic Absorption Spectrophotometry method was used for water analysis, and the Health Risk Assessment methodology was developed. The average lead concentration was 0.095 mg/L±0.014 mg/L, with a minimum value of 0.070 mg/L and a maximum value of 0.113 mg/L. These values exceed the Permissible Limit Values (PLVs) of the WHO and the Water Quality Regulation. Following the concentration measurements, the Health Risk Assessment was applied, calculating the exposure dose, which was 0.002714 mg/kg/L for adults and 0.0095 mg/kg/L for children aged 4 to 8 years. The exposure factor was 1. The hazard quotient (HQ) determined was 0.452 for adults and 1.583 for children. Conclusion: No toxicological risk exists for adults; however, a toxicological risk does exist for children, as the HQ quotient is greater than 1.