Video Experimental Relacionado

Updated: Sep 10, 2025

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil

Published on: September 1, 2020

Bioacumulación de elementos en la parte comestible de los vegetales procedentes del suelo agrícola: distribución de

Rahat Khan¹, Md Samium Basir², Narottam Saha³

¹Institute of Nuclear Science & Technology, Bangladesh Atomic Energy Commission (BAEC), Savar, Dhaka, 1349, Bangladesh.

Journal of environmental management

|August 27, 2025

Resumen

La contaminación por metales pesados en los suelos y vegetales de Bangladesh plantea riesgos. Las fuentes industriales y vehiculares contaminan los alimentos, con altos niveles de cobalto, cromo y manganeso que afectan la salud humana.

Área de la Ciencia:

Ciencias del medio ambiente
Química del medio ambiente
Toxicología

Sus antecedentes:

La contaminación por metales pesados es una preocupación ambiental significativa, que afecta a los ecosistemas, la seguridad alimentaria y la salud humana.
Comprender las fuentes de contaminación y los riesgos es crucial para una gestión ambiental eficaz y la protección de la salud pública.

Objetivo del estudio:

Para analizar la contaminación por HM en suelos y vegetales de Chattogram, Bangladesh.
Identificar las fuentes de HM, evaluar los riesgos ecológicos y evaluar los posibles impactos en la salud humana.

Principales métodos:

Se analizaron diecisiete elementos utilizando el análisis de activación de neutrones.
Los índices geoambientales y la factorización de matriz positiva (PMF) se utilizaron para la distribución de las fuentes.
Para la evaluación del riesgo se calcularon los factores de bioacumulación (BCF) y los coeficientes de riesgo objetivo (THQ).

Principales resultados:

Se observó un enriquecimiento significativo de antimonio (Sb) y arsénico (As), con orígenes geogénicos y antropogénicos mixtos.
Las actividades industriales, la agricultura, las emisiones vehiculares y la incineración de residuos se identificaron como los principales contribuyentes a la contaminación por HM.
Los vegetales sin hojas mostraron una mayor absorción de metales, en particular de zinc (Zn) y potasio (K).
Las evaluaciones de riesgos para la salud revelaron THQ excesivos para el cobalto (Co), el cromo (Cr) y el manganeso (Mn), con riesgos cancerígenos de Cr que exceden los límites de seguridad.

Conclusiones:

El estudio pone de relieve los riesgos críticos para la sostenibilidad ambiental y la salud pública debido a la contaminación por HM.
Se hace hincapié en la necesidad urgente de la remediación del suelo, el uso controlado de agroquímicos y las sólidas regulaciones de seguridad alimentaria.
Las estrategias de mitigación son esenciales para reducir la exposición a HM y proteger a la población en la región estudiada.

Palabras clave:

Suelos y hortalizas agrícolas Factor de bioconcentración Riesgo ecológico Riesgos para la salud Los metales pesados Modelo de las PMF Subdistritos de Raozan y Rangunia

Más Videos Relacionados

A Method to Preserve Wetland Roots and Rhizospheres for Elemental Imaging

A Method to Preserve Wetland Roots and Rhizospheres for Elemental Imaging

Published on: February 15, 2021

Hydroponics: A Versatile System to Study Nutrient Allocation and Plant Responses to Nutrient Availability and Exposure to Toxic Elements

Hydroponics: A Versatile System to Study Nutrient Allocation and Plant Responses to Nutrient Availability and Exposure to Toxic Elements

Published on: July 13, 2016

Videos de Conceptos Relacionados

The Periodic Table and Organismal Elements

The Periodic Table and Organismal Elements

Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally occurring, and only a few of them are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.
Periodic Table Provides Information...

Types of Toxins

Types of Toxins

Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...

Key Elements for Plant Nutrition

Key Elements for Plant Nutrition

Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...

The Roles of Bacteria and Fungi in Plant Nutrition

The Roles of Bacteria and Fungi in Plant Nutrition

Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.

Microorganisms in Agriculture and Food industry

Microorganisms in Agriculture and Food industry

Microorganisms play a crucial role in agriculture and the food industry, contributing to soil fertility, crop protection, and food production. Their functions range from nitrogen fixation and biopesticide production to fermentation and food preservation, making them indispensable to sustainable farming and food safety.Role in AgricultureNitrogen-fixing bacteria, such as Rhizobium (symbiotic) and Azotobacter (free-living), convert atmospheric nitrogen into ammonia through biological nitrogen...