Bioconcentration describes the accumulation of a water-borne chemical by an aquatic organism, whereas bioaccumulation covers the uptake from all environmental sources, e.g. water, food and sediment. The bioconcentration potential of a chemical, expressed as the ‘BCF’, is either predicted or measured.
Bioconcentration – an overview | ScienceDirect Topics
Bioconcentration, Bioaccumulation, and Metabolism of …
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What is an example of bioconcentration?
In a classic example of bioconcentration, a fish living in a river contaminated by pharmaceutical waste might intake high levels of human hormones from the water.
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What is the difference between bioconcentration and biomagnification?
The bioconcentration factor (BCF) refers to the chemical concentration of a substance in an organism’s tissue, divided by its equilibrium concentration in water expressed in equivalent units. The biomagnification factor (BMF, or enrichment factor ) is the ratio of observed to theoretical lipid–normalized BCF.
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What does a high bioconcentration factor mean?
F. Bioconcentration factors (BCFs) are calculated by considering pesticide tissue concentrations with respect to environmental pesticide concentrations. BCF values > 1 indicate that the concentration in the organism is greater than that of the medium (e.g., soil or water) from which the pesticide was taken.
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What is bioconcentration of pesticides?
The increase in the concentration of harmful chemical substances, such as pesticides, in the body of living organisms at each trophic level of a food chain is called bioconcentration of pesticides. The common pesticide that has accumulated in the human body in considerable amounts is DDT.
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What is bioconcentration explanation?
An example of bioaccumulation is that of car emission chemicals building up in birds and other animals, mercury building up in fish. Bioaccumulation is the gradual accumulation of substances, such as pesticides or other chemicals, in an organism.
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What is a simple example of bioaccumulation?
Uptake of chemicals by an organism can take place by breathing, absorbing through skin or swallowing. When the concentration of a chemical is higher within the organism compared to its surroundings (air or water), it is referred to as bioconcentration.
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How does bioconcentration happen?
Bioaccumulation occurs when toxins build up – or accumulate – in a food chain. The animals at the top of the food chain are affected most severely. This is what happens: Small amounts of toxic substances – often pesticides or pollution from human activity – are absorbed by plants.
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What does a high bioconcentration factor?
A bioconcentration factor greater than 1 is indicative of a hydrophobic or lipophilic chemical. It is an indicator of how probable a chemical is to bioaccumulate. These chemicals have high lipid affinities and will concentrate in tissues with high lipid content instead of in an aqueous environment like the cytosol.
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What is the importance of bioconcentration factor?
BCF is an important concept in environmental risk assessment since it gives quantitative information regarding the ability of a contaminant to be taken up by organisms from the water. It is often used as one of the first screening parameters for persistent, bioaccumulative, and toxic substances.
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What is bioconcentration explanation?
Bioconcentration is the intake and retention of a substance in an organism entirely by respiration from water in aquatic ecosystems or from air in terrestrial ones. Bioaccumulation is the intake of a chemical and its concentration in the organism by all possible means, including contact, respiration and ingestion.
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What is difference between bioaccumulation and bioconcentration?
Bioaccumulation takes place in a single organism over the span of its life, resulting in a higher concentration in older individuals. Biomagnification takes place as chemicals transfer from lower trophic levels to higher trophic levels within a food web, resulting in a higher concentration in apex predators.
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What is the difference between biomagnification and biomagnification?
Bioconcentration is the ability of an organism to accumulate a chemical from the ambient environment. It is quantitatively expressed in terms of the bioconcentration factor (BCF) which is the ratio of the concentration of the chemical in the organism to its concentration in the ambient environment.
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What is meant by Bioconcentration?
Bioaccumulation is the process by which toxins enter the food web by building up in individual organisms, while biomagnification is the process by which toxins are passed from one trophic level to the next (and thereby increase in concentration) within a food web.
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What is meant by bioconcentration?
Bioconcentration is the ability of an organism to accumulate a chemical from the ambient environment. It is quantitatively expressed in terms of the bioconcentration factor (BCF) which is the ratio of the concentration of the chemical in the organism to its concentration in the ambient environment.
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What is mean by bioconcentration of pesticides?
The increase in the concentration of harmful chemical substances, such as pesticides, in the body of living organisms at each trophic level of a food chain is called bioconcentration of pesticides. The common pesticide that has accumulated in the human body in considerable amounts is DDT.
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How will you control bioconcentration of pesticides?
Bioconcentration is primarily controlled by the physico-chemical properties of the chemicals involved, the physiological disposition of each organism, and the surrounding environmental conditions (Barron 1990; Connell 1988; Landrum and Fisher 1998; Miyamoto et al. 1990).
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What is an example of bioconcentration?
In a classic example of bioconcentration, a fish living in a river contaminated by pharmaceutical waste might intake high levels of human hormones from the water.
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