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  2. Toxic heavy metal - Wikipedia

    en.wikipedia.org/wiki/Toxic_heavy_metal

    A toxic heavy metal is a common but misleading term for a metal-like element noted for its potential toxicity. [4] Not all heavy metals are toxic and some toxic metals are not heavy. [ 5 ] Elements often discussed as toxic include cadmium , mercury and lead , [ 6 ] all of which appear in the World Health Organization 's list of 10 chemicals of ...

  3. List of waste disposal incidents - Wikipedia

    en.wikipedia.org/wiki/List_of_waste_disposal...

    2015 Gold King Mine waste water spill: acid mine waste spill 2015 United States Gold mine at Kingston, Queensland: toxic waste Australia Lake Karachay: radioactive waste dump site Russia Love Canal: toxic waste dump United States Māpua contaminated site: toxic waste 1932-88 New Zealand Martin County sludge spill: water pollution 2000 United ...

  4. Leaching (metallurgy) - Wikipedia

    en.wikipedia.org/wiki/Leaching_(metallurgy)

    Leaching is a process widely used in extractive metallurgy where ore is treated with chemicals to convert the valuable metals within the ore, into soluble salts while the impurity remains insoluble. These can then be washed out and processed to give the pure metal; the materials left over are commonly known as tailings.

  5. Hazardous waste - Wikipedia

    en.wikipedia.org/wiki/Hazardous_waste

    Waste can be hazardous because it is toxic, reacts violently with other chemicals, or is corrosive, among other traits. [1] As of 2022, humanity produces 300-500 million metric tons of hazardous waste annually. [2] Some common examples are electronics, batteries, and paints. An important aspect of managing hazardous waste is safe disposal.

  6. Chemical waste - Wikipedia

    en.wikipedia.org/wiki/Chemical_waste

    The U.S. Environmental Protection Agency (EPA) prohibits disposing of certain materials down drains. [4] Therefore, when hazardous chemical waste is generated in a laboratory setting, it is usually stored on-site in appropriate waste containers, such as triple-rinsed chemical storage containers [5] or carboys, where it is later collected and disposed of in order to meet safety, health, and ...

  7. Toxic waste - Wikipedia

    en.wikipedia.org/wiki/Toxic_waste

    Toxic materials are poisonous byproducts as a result of industries such as manufacturing, farming, construction, automotive, laboratories, and hospitals which may contain heavy metals, radiation, dangerous pathogens, or other toxins. Toxic waste has become more abundant since the Industrial Revolution, causing serious global issues.

  8. Leachate - Wikipedia

    en.wikipedia.org/wiki/Leachate

    In actively decomposing waste, the temperature rises and the pH falls rapidly with the result that many metal ions that are relatively insoluble at neutral pH become dissolved in the developing leachate. The decomposition processes themselves release more water, which adds to the volume of leachate.

  9. Hazardous waste in the United States - Wikipedia

    en.wikipedia.org/wiki/Hazardous_waste_in_the...

    Nitric oxide is an example of a P-list waste and carries the number P076. U-Listed wastes are considered "hazardous" when discarded and are regulated in a somewhat less stringent manner than P-Listed wastes. Acetone is an example of a U-Listed waste and carries the number U002. [10]