Análisis de estudios en metales pesados en zonas agrícolas de Colombia

Mahecha-Pulido, Juan D.; Trujillo‐González, Juan Manuel; Torres-Mora, Marco Aurelio

doi:10.22579/20112629.434

Cited by 7 publications

(3 citation statements)

References 57 publications

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“…Por último, al evaluar la concentración de fósforo disponible y elementos traza presentes en el suelo, se encontró que los valores (tabla IV) están en los rangos establecidos por investigaciones realizadas en suelos oxisólicos del lugar (Eurípides, Peñuela, Yacomeloy Orduz-Rodríguez, 2018, Fernandes et al, 2018. Sin embargo, hubo un incremento en la concentración de fósforo disponible (56 mg kg −1 ), así como elementos traza como el As (4 mg kg −1 ), los cuales no representan ningún daño ni perjuicio para el normal funcionamiento del suelo (Fernandes et al, 2018, Rueda, Rodríguez y Madriñán, 2011, Mahecha-Pulido, Trujillo-González y Torres-Mora, 2015, Nunes et al, 2017.…”

Section: Calidad Del Suelounclassified

Impacto ambiental del vertimiento de aguas servidas en aglomerados urbanos ilegales del municipio de Villavicencio, Colombia

Salcedo

Segura²,

Laverde³

et al. 2021

Tecnura

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Contexto: La conformación de conglomerados habitacionales ilegales, en la mayoría de los casos, sin saneamiento básico adecuado, puede generar deterioro de los recursos naturales. El presente estudio evaluó el impacto ambiental asociado al vertimiento de aguas servidas urbanas (ASU) sobre suelos y cuerpos de agua, en un aglomerado urbano ilegal del municipio de Villavicencio. Metodología: A partir de 15 puntos de muestreo se determinaron parámetros fisicoquímicos de agua: serie de sólidos, turbiedad, color, demanda química de oxígeno (DQO), pH, conductividad eléctrica (CE), oxígeno disuelto (OD); y de suelo: pH, CE, capacidad de intercambio catiónico (CIC) y concentración de C, N y elementos traza, para identificar impactos sobre los recursos en el área de estudio. Resultados: Las muestras de ASU presentaron valores elevados en parámetros como turbiedad (326 NTU), color (744 UPC) y DQO bruta (600 a 1500 mg l-1). En los análisis de cuerpos de agua aledaños al sector, la DQO varió entre 368 y 429 mg l-1. Asimismo, el OD osciló entre 5,7 y 7,1 mg l-1, valores que resultaron favorables para los cauces; sin embargo, fueron bajos para el ASU (0,9 mg l-1). Por su parte, se determinó una alteración significativa en propiedades fisicoquímicas del suelo como pH (5,8-8,2), CIC (8,2-16,78 mEq-g 100 g-1), CE (57,6-517,3 µS cm-1) y N (0,03-0,84 mg kg-1) asociadas principalmente a los vertimientos. Conclusiones: Fue posible identificar un efecto negativo en los recursos agua y suelo, generado por descargas descontroladas de ASU en el lugar, lo cual se encuentra relacionado una pérdida de servicios ambientales y baja calidad de vida.

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Section: Calidad Del Suelounclassified

Impacto ambiental del vertimiento de aguas servidas en aglomerados urbanos ilegales del municipio de Villavicencio, Colombia

Salcedo

Segura²,

Laverde³

et al. 2021

Tecnura

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“…Soil contamination is a global problem in which abnormal concentrations of elements or substances that can affect the development of life are generated [1]. Naturally, the content of these elements can have a geogenic origin that can be toxic in high concentrations [2], (although many times this originates from anthropogenic factors. One of the unique properties of soils is their ability to store long-term information about the healthy state of the territory [3].…”

Section: Introductionmentioning

confidence: 99%

Potential Toxic Elements Pollution Status in Zones of Technogenic Impact in Central Regions of Perú

Tume,

Cornejo,

Cabezas

et al. 2024

Minerals

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Soil is a component of the environment. An environmental policy should identify the sources of trace metals in the soil and their effects on people and living beings. The concentrations of 29 surface soil samples (0–25 cm) were determined using the methods EPA 3050B. The data were analyzed using simple and robust statistical analysis that allowed for determining geochemical baseline values. Principal component and correlation analyses were performed, which, together with a spatial analysis, allowed us to distinguish between geogenic and anthropogenic sources. The degree of soil contamination was evaluated using different ecological indices, and the health risks to children and adults were calculated using formulas proposed by the United States Environmental Protection Agency (USEPA). The median concentrations of the analyzed elements correspond to Al 17,666 (mg/kg), As 8.7 (mg/kg), Ba 61.4 (mg/kg), Cd 0.17 (mg/kg), Cr 11.3 (mg/kg), Cu 20.5 (mg/kg), Fe 25,953 (mg/kg), Hg 0.06 (mg/kg), Mn 499 (mg/kg), Ni 20.8 (mg/kg), Pb 15.9 (mg/kg), and Zn 60.6 (mg/kg). In the principal component analysis, four factors were identified that explain 70.3% of the variability of the elements, which, together with the correlation analysis, suggest that the origin of the elements is mainly geogenic with some possible anthropic contributions. The elements analyzed in the soil with moderate contamination correspond to As, Cd, and Pb, in addition, As is the only element that indicated a value above the limit for carcinogenic risk in children. The estimated geochemical baseline values correspond to Al 34,734 (mg/kg), As 15.3 (mg/kg), Ba 113 (mg/kg), Cd 0.41 (mg/kg), Cr 33.8 (mg/kg), Cu 42.9 (mg/kg), Fe 46,181 (mg/kg), Hg 0.12 (mg/kg), Mn 1015 (mg/kg), Ni 42.2 (mg/kg), Pb 21.6 (mg/kg), and Zn 121 (mg/kg). 89.7% of the total samples are at a low level of contamination. The carcinogenic risk due to As in children represents 3.4% of the total samples, so it is considered insignificant.

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“…However, despite their economic and ecosystem significance, these rivers face concerning levels of heavy metal pollution attributed to illegal gold extraction and untreated wastewater dumping, which resulted in the accumulation of these toxic compounds into the sediments, particularly in the Colombian Pacific area [22]. For example, cadmium pollution is often linked with the use of agrochemicals, of battery manufacturing, pigments, anticorrosive agents, and contaminated irrigation water [23][24][25]; zinc contamination may result from discharge of dyes and detergents, while lead is mainly derived from the textile industry, battery production, paint manufacturing, insecticide use, fossil fuel consumption, waste incineration, and metallurgical processes [26,27]. In particular, lead represents one of the most significant heavy metal contaminants on a global scale, raising alarming concerns on both human health and biodiversity [17].…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Tolerance of Microorganisms Isolated from Coastal Marine Sediments and Their Lead Removal Potential

Alvarado-Campo,

Quintero,

Cuadrado-Cano

et al. 2023

Microorganisms

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In this study, 338 microorganisms, comprising 271 bacteria and 67 fungi, were isolated from sediment samples collected from underexplored Pacific and Caribbean regions of Colombia. Screening trials were conducted on selected strains (n = 276) to assess their tolerance to cadmium (Cd2+), lead (Pb2+), and zinc (Zn2+), leading to the identification of six bacteria capable of withstanding 750 mg·L−1 of each heavy metal ion. Three promising microorganisms, identified as Enterobacter sp. INV PRT213, Pseudomonas sp. INV PRT215, and Stenotrophomonas sp. INV PRT216 were selected for lead removal experiments using LB broth medium supplemented with 400 mg·L−1 Pb2+. Among these, Pseudomonas sp. INV PRT215 exhibited significant potential, removing 49% of initial Pb2+ after 240 min of exposure (16.7 g wet biomass·L−1, pH 5, 30 °C). Infrared spectra of Pb-exposed biomass showed changes in functional groups, including carbonyl groups of amides, carboxylate, phosphate, hydroxyl, and amine groups, compared to the not-exposed control. These changes suggested interactions between the metal and functional groups in the biomass. The findings of this study highlight the potential of microorganisms derived from coastal marine environments as promising candidates for future applications in bioremediation of polluted environments contaminated with heavy metals.

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Análisis de estudios en metales pesados en zonas agrícolas de Colombia

Cited by 7 publications

References 57 publications

Impacto ambiental del vertimiento de aguas servidas en aglomerados urbanos ilegales del municipio de Villavicencio, Colombia

Impacto ambiental del vertimiento de aguas servidas en aglomerados urbanos ilegales del municipio de Villavicencio, Colombia

Potential Toxic Elements Pollution Status in Zones of Technogenic Impact in Central Regions of Perú

Heavy Metal Tolerance of Microorganisms Isolated from Coastal Marine Sediments and Their Lead Removal Potential

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