Ingesta de arsénico: el impacto en la alimentación y la salud humana

Medina-Pizzali, María Luisa; Robles, Pamela; Mendoza, Mónica; Torres, Cristian

doi:10.17843/rpmesp.2018.351.3604

Cited by 25 publications

(9 citation statements)

References 41 publications

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“…As is a carcinogen that has a variety of acute and long-term detrimental impacts on human health. 21 Hg increases reactive oxygen species (ROS) generation, which causes widespread oxidative damage. Covalent bonds are formed between cysteine residues of protein and Hg (II), which forms a chemical carcinogen and initiates carcinogenesis.…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Accumulation in Fruits and Vegetables and Human Health Risk Assessment: Findings From Maharashtra, India

Mawari

Kumar

Sarkar

et al. 2022

Environ�Health�Insights

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background: Vegetables are consumed enormously by humans all over the world. Consumption of contaminated fruits and vegetables is the most likely route of heavy metal exposure. Hence, it is important to quantify heavy metal concentration in frequently consumed fruits and vegetables. materials and methods: The main aim of our study is to investigate heavy metal (Pb, Cd, As, and Hg) contamination in 24 different kinds of vegetables and fruits grown in the industrialized city of Solapur, Maharashtra, India. Potential health risks due to the consumption of fruits and vegetables were assessed. Heavy metal concentration and quality of native soil were also determined. Vegetable and fruit samples were analyzed using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) Agilent 7500. results: The mean concentrations of selected heavy metals in fruits and vegetables analyzed were: Lead (0.17 ± 0.38 mg/kg) > Mercury (0.06 ± 0.09 mg/kg) > Cadmium (0.02 ± 0.007 mg/kg) > Arsenic (0.002 ± 0.003 mg/kg). Among them, garlic showed the highest heavy metal accumulation followed by potato. conclusion: Overall, vegetables showed higher metal accumulations than fruits. Some vegetables showed alarming levels of human health risk indices such as the Metal Pollution Index (MPI), Health Risk Index (HRI) and Hazard Index (HI), suggesting that reducing the intake amount of these vegetables may lower the adverse health effects.

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Section: Introductionmentioning

confidence: 99%

Heavy Metal Accumulation in Fruits and Vegetables and Human Health Risk Assessment: Findings From Maharashtra, India

Mawari

Kumar

Sarkar

et al. 2022

Environ�Health�Insights

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“…Es importante mencionar que las estaciones M-4 y M-5 están descubiertas, sin vegetación de ribera que los cubra, lo que permite su incremento de temperatura en su recorrido. Como se observa en la tabla III podemos notar una alta concentración de arsénico en la estación M-1 que superó lo s ECAS canadienses para sedimentos en casi el doble de su valor promedio, esto es preocupante debido a la toxicidad de es t e elemento [14]. Para las demás estaciones ninguna supera lo establecido en esta norma.…”

Section: A Resultados De Los Parámetros Físico-químicos Y Metales En ...unclassified

Ecological Assessment of the Fluvial Ecosystem of the Chonta River With Mining Influence in Northern Peru

Peña¹,

Maestre²,

Gutierrez³

2022

Proceedings of the 20th LACCEI International Multi-Conference for Engineering, Education and Technology: “Education, Research A

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con lombrices Eisenia fetida y la aplicación del protocolo CERA con macroinvertebrados, con el objetivo de evalua r el estado ecológico del río Chonta en sus partes alta y media. Pa ra ello se establecieron cinco estaciones de monitoreo: cuatro de contro l (M-1, M-3, M-4, M-5) y una de referencia (M-2). Cabe menciona r que la estación M1 presenta impactos por la actividad minera. L o s metales analizados en sedimentos fueron: As, Cd, Pb, Hg, Ni, Z n, Cu y Cr, cuyos resultados fueron comparados con los valores umbra les establecidos en los estándares canadienses de calidad para sedimentos, valores TEL (ECA canadiense). Los resultados obtenidos fueron los siguientes: Al ser analizadas por las tres técnicas, las estaciones con mayor grado de contaminación fuero n M-1, M-4 y M-5; asimismo las concentraciones promedio de metales en sedimentos más altas obtenidas durante las 4 campañas fuero n para el Zn: 24.084 mg/kg, As: 12.15 mg/kg y Cd: 0.579 mg/kg en M-1. La estación M-1 presentó la mayor concentración en casi todos lo s metales analizados; en esta estación el As y Cd superaron los estándares canadienses para sedimentos valores TEL en todas la s campañas. También tenemos que el Cd excedió los ECA canadienses de sedimentos en M-1 (primera campaña: 0.974 mg /kg y cua rta campaña: 1.017 mg/kg), M-2 (cuarta campaña: 0.847 mg/kg), y M -3 (cuarta campaña: 0.959 mg/kg). Ninguno de los siguientes meta les superó los ECA canadienses para sedimentos: Ni, Zn, Cr, Cu, Pb y Hg. Por otro lado, el test de supervivencia determinó que los meta les tóxicos influyen en el crecimiento de las lombrices, así tenemos que la mayor pérdida de peso se registró en M-1 con -34.9%. Finalmente, las valoraciones del Protocolo CERA arrojaron calidades ecológica s que van de pésimas en todas las campañas para M-1, M-4 y M-5 a sí como malas para M-3, y regular en promedio para M-2.

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“…The World Health Organization recommends an upper limit of 10 µg As/L in water for human consumption. However, concentrations in the order of milligrams of As/L have been detected in water intended for consumption, significantly exceeding the prescribed limit ( 6 ). Considering this scenario, it is of utmost importance to develop methods and technologies capable of permanently and effectively removing As from soil and water.…”

Section: Introductionmentioning

confidence: 99%

Characterization of biofilm formation by Exiguobacterium strains in response to arsenic exposure

Pavez,

Pacheco,

Castro-Severyn

et al. 2023

Microbiol Spectr

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The Salar de Huasco (SH) salt lake in northern Chile is an extreme environment characterized by high atmospheric pressure, UV radiation, salinity, variable temperatures, and the presence of heavy metals, including arsenic. Exiguobacterium bacteria have adapted to thrive in these challenging conditions and possess various resistance mechanisms, including biofilm formation, redox reactions, methylation, and altered respiration. In this study, Exiguobacterium strains isolated from the SH were assessed for their capacity to form biofilms in the presence of arsenic, a metalloid that exists in different oxidation states, in order to understand their resistance mechanisms to this heavy metal. The minimum inhibitory concentration (MIC) of each strain against different concentrations of arsenic [III] and [V], biofilm formation using crystal violet staining, and the expression of genes related to biofilm formation were evaluated. The structure of the biofilms was characterized using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Furthermore, the extracellular polymeric substances (EPS) produced during biofilm formation were purified, quantified, and their composition determined. The results showed that the tested Exiguobacterium strains exhibit a significant ability to form biofilms when exposed to arsenic. This biofilm contributes to their arsenic resistance, shedding light on the underlying mechanisms. These findings enhanced our understanding of the biofilm formation process, its role in arsenic resistance, and the adaptive strategies employed by bacteria in extreme environments. This study also contributes to the field of microbial resistance mechanisms that have implications for environmental and biotechnological applications. IMPORTANCE In this work, we characterized the composition, structure, and functional potential for biofilm formation of Exiguobacterium strains isolated from the Salar de Huasco in Chile in the presence of arsenic, an abundant metalloid in the Salar that exists in different oxidation states. Our results showed that the Exiguobacterium strains tested exhibit a significant capacity to form biofilms when exposed to arsenic, which would contribute to their resistance to the metalloid. The results highlight the importance of biofilm formation and the presence of specific resistance mechanisms in the ability of microorganisms to survive and thrive under adverse conditions.

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Ingesta de arsénico: el impacto en la alimentación y la salud humana

Cited by 25 publications

References 41 publications

Heavy Metal Accumulation in Fruits and Vegetables and Human Health Risk Assessment: Findings From Maharashtra, India

Heavy Metal Accumulation in Fruits and Vegetables and Human Health Risk Assessment: Findings From Maharashtra, India

Ecological Assessment of the Fluvial Ecosystem of the Chonta River With Mining Influence in Northern Peru

Characterization of biofilm formation by Exiguobacterium strains in response to arsenic exposure

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