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Related Concept Videos

Acid Mine Drainage01:19

Acid Mine Drainage

Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...
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When acids come into contact with concrete, they initiate a chemical reaction that dissolves the hydrated cement paste. This process leads to softening and structural weakening of the concrete. This issue is commonly observed in environments such as chimneys, sewers, and industrial settings. The severity of the damage increases as the pH of the water interacting with the concrete drops below 6.5. In particular, a pH under 4.5 can cause significant concrete damage.
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Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
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Freshwater Microbial Ecology

Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic systems...
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An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.Ecological disturbances can be caused by an event as small as the trampling of underbrush to an incident as wide-ranging as a forest...
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Design and Construction of an Urban Runoff Research Facility
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Published on: August 8, 2014

Acid rain and its ecological consequences.

Anita Singh1, Madhoolika Agrawal

  • 1Ecology Research Laboratory, Department of Botany, Banaras Hindu University, Varanasi 221 005, India.

Journal of Environmental Biology
|October 4, 2008
PubMed
Summary
This summary is machine-generated.

Acid rain, a mix of sulfuric and nitric acids, harms ecosystems by increasing soil acidity and damaging aquatic life. Reducing precursor emissions has helped mitigate these environmental impacts over the past two decades.

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Area of Science:

  • Environmental Science
  • Ecology
  • Atmospheric Chemistry

Background:

  • Acid rain is a significant transboundary environmental issue.
  • It results from atmospheric sulfur and nitrogen oxides forming sulfuric and nitric acids.
  • These acids increase soil acidity, mobilize toxic metals, and reduce soil fertility.

Purpose of the Study:

  • To summarize the environmental impacts of acid rain.
  • To highlight the effects on terrestrial and aquatic ecosystems.
  • To discuss mitigation strategies and their effectiveness.

Main Methods:

  • Literature review of acid rain effects.
  • Analysis of atmospheric chemistry leading to acid formation.
  • Assessment of ecological and material impacts.
  • Evaluation of mitigation measures like emission reduction and liming.

Main Results:

  • Acidification lowers soil pH, leaches nutrients, and increases heavy metal availability, negatively impacting plant growth.
  • Aquatic ecosystems, including fish populations, suffer significant damage.
  • Acid rain also affects human health indirectly and damages man-made structures.
  • Emission reductions and liming have led to a decrease in acidification problems over the last 20 years.

Conclusions:

  • Acid rain poses a severe threat to ecosystems and infrastructure.
  • Reducing precursor emissions is a key strategy for mitigating acid rain impacts.
  • Continued monitoring and management are essential for ecosystem health.