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  2. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption ( drinking water ), but water purification may also be carried out for a variety of ...

  3. Potassium permanganate - Wikipedia

    en.wikipedia.org/wiki/Potassium_permanganate

    Potassium permanganate is widely used in the chemical industry and laboratories as a strong oxidizing agent, and also as a medication for dermatitis, for cleaning wounds, and general disinfection. It is on the World Health Organization's List of Essential Medicines. [5] In 2000, worldwide production was estimated at 30,000 tons. [5]

  4. Ceramic water filter - Wikipedia

    en.wikipedia.org/wiki/Ceramic_water_filter

    Cleaning these filters is the same as with the clay pot filter but also allows for reverse-flow cleaning, wherein clean water is forced through the filter backwards, pushing any contaminants out of the ceramic pores. The major risks to the success of all forms of ceramic filtration are hairline cracks and cross-contamination.

  5. 3M's HVAC air filter tells you when it needs replacing - Engadget

    www.engadget.com/2018-01-09-3ms-hvac-air-filter...

    That's what has prompted 3M to build the Filtrete Bluetooth-enabled residential air filter, which lets you know when it's time for a change. The idea being that the filter itself can alert you ...

  6. The best air purifier for 2024 - Engadget

    www.engadget.com/best-air-purifier-120040002.html

    The Core 400S claims a half-hour air exchange rate for a 1,000-square-foot room and combines the three main filter types — pre-filter, activated carbon and particle — into a single ring ...

  7. Iron-oxidizing bacteria - Wikipedia

    en.wikipedia.org/wiki/Iron-oxidizing_bacteria

    The anoxygenic phototrophic iron oxidation was the first anaerobic metabolism to be described within the iron anaerobic oxidation metabolism. The photoferrotrophic bacteria use Fe 2+ as electron donor and the energy from light to assimilate CO 2 into biomass through the Calvin Benson-Bassam cycle (or rTCA cycle) in a neutrophilic environment (pH 5.5-7.2), producing Fe 3+ oxides as a waste ...

  8. This in-home water recycler is meant to help the planet, and ...

    www.engadget.com/2020-01-08-hydraloop-home-water...

    With concerns over water scarcity on the rise, companies are increasingly looking to give people ways to reduce their water consumption. For Hydraloop founder and CEO Arthur Valkieser, the answer ...

  9. Activated carbon - Wikipedia

    en.wikipedia.org/wiki/Activated_carbon

    Activated carbon. Activated carbon, also called activated charcoal, is a form of carbon commonly used to filter contaminants from water and air, among many other uses. It is processed (activated) to have small, low-volume pores that greatly increase the surface area [1] [2] available for adsorption or chemical reactions [3] that can be thought of as a microscopic "sponge" structure (adsorption ...

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