Environmental Toxicology

Environmental toxicology is related to the study of various effects of synthetic and natural pollutants in the environment. It is mainly related to the study of anthropogenic origin environmental chemicals. Environmental toxicology is categorized into two types namely Ecotoxicology and Environmental Health Toxicology. 

Environmental Toxicology 01

  • Ecotoxicology: It is the study of the harmful effects of the toxic chemicals on biological organisms. It effect mainly the community, biosphere and ecosystem level.
  • Environmental Health Toxicology: It mainly deals with the study of adverse and harmful effects of environmental chemicals on human health.

Environmental Degradation

Environmental degradation is caused due to institutional, socio-economical and technological activities. It is the deterioration of the environment through the depletion of resources like water, air, and soil. Here both biotic and abiotic processes contribute to the degradation of the environment.

Environmental Toxicology 02

Abiotic Degradation: It is a prominent process that mainly occurs under the influences of hydrolysis and photolysis.

  • Hydrolysis: Hydrolytic reaction is the reaction of water with another chemical compound to form two or more products involving usually splitting the other compound. In simple terms when water combines with heat or light energy it can break chemical bonds, this process is known as hydrolysis.
  • Photolysis: It mainly occurs on surface waters or in the atmosphere where the intensity of light is at its highest. Photolysis is a chemical process by which molecules are broken down into smaller parts or units through the absorption of light.

Biotic Degradation: Microorganisms such as fungi and bacteria are prime factors responsible for biotic degradation. These microorganisms degrade chemicals to obtain energy from these sources. It occurs at a highly accelerated rate, far exceeding abiotic degradation. It is a process that can completely lead to the mineralization of chemicals to carbon dioxide, water, and other basic inorganic constituents. Bioremediation is a process wherein microorganisms are used to mitigate environmental contaminants. 

Bioaccumulation: It is a process where organisms accumulate themselves with chemicals from dietary sources or from an abiotic environment. And through passive diffusion, these organisms take in these toxic chemical substances. Some of the primary organs that uptake this toxic include the gastrointestinal tract, gills, and lungs. But other organs such as scales, skin, feathers, fur, etc. act as a protective barrier against various chemical toxic.

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Frequently Asked Questions – FAQs

Q1

How does chemistry help the environment?

Chemistry will help us understand the world around us, track it, protect it and develop it. Chemists are designing tools and techniques to ensure that air and water contamination is seen and measured.
Q2

Why is chemistry important to the environment?

Environmental chemistry is socially important as it deals with pollutants ‘ environmental impact, contamination reduction, and environmental management.
Q3

What is Environmental Degradation?

Environmental degradation is the deterioration of the environment through the depletion of resources like water, air, and soil. It is caused due to institutional, socio-economical and technological activities.
Q4

Define bioaccumulation.

It is a process where organisms accumulate themselves with chemicals from dietary sources or from an abiotic environment. And through passive diffusion, these organisms take in these toxic chemical substances.
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