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2. Iron-oxidizing bacteria - Wikipedia

   en.wikipedia.org/wiki/Iron-oxidizing_bacteria

   Any previously precipitated iron is removed by simple mechanical filtration. Several different filter media may be used in these iron filters, including manganese greensand, Birm, MTM, multi-media, sand, and other synthetic materials. In most cases, the higher oxides of manganese produce the desired oxidizing action.

3. Greensand - Wikipedia

   en.wikipedia.org/wiki/Greensand

   Greensand glauconite is used as a water softener for its chemical-exchange properties. Greensand coated with manganese oxide (called manganese greensand) is used in well water treatment systems to remove dissolved (reduced) iron and manganese with the addition of an oxidant, usually potassium permanganate, under controlled pH conditions. [14]

4. Media filter - Wikipedia

   en.wikipedia.org/wiki/Media_filter

   Media filters are used to protect water quality in streams, rivers, and lakes. They can be effective at removing pollutants in stormwater such as suspended solids and phosphorus. Sand is the most common filter material. [ 3][ 4] In other filters, sometimes called "organic filters," wood chips or leaf mold may be used. [ 5]

5. Manganese - Wikipedia

   en.wikipedia.org/wiki/Manganese

   Manganese is a chemical element; it has symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese was first isolated in the 1770s. Manganese is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels. It improves strength ...

6. Backwashing (water treatment) - Wikipedia

   en.wikipedia.org/wiki/Backwashing_(water_treatment)

   Backwashing is a form of preventive maintenance so that the filter media can be reused. In water treatment plants, backwashing can be an automated process that is run by local programmable logic controllers (PLCs). The backwash cycle is triggered after a set time interval, when the filter effluent turbidity is greater than a treatment guideline ...

7. Scientists may have a solution to the International Space ...

   www.engadget.com/scientists-may-have-a-solution...

   The multidisciplinary study found covering surfaces with a thin layer of nucleic acids prevented bacterial growth on the ISS-exposed samples. The scientists concluded that these acids carried a ...

8. Manganese nodule - Wikipedia

   en.wikipedia.org/wiki/Manganese_nodule

   Manganese nodule. Polymetallic nodules, also called manganese nodules, are mineral concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. As nodules can be found in vast quantities, and contain valuable metals, deposits have been identified as a potential economic interest. [ 1]

9. Manganese dioxide - Wikipedia

   en.wikipedia.org/wiki/Manganese_dioxide

   Manganese dioxide is the inorganic compound with the formula MnO. 2. This blackish or brown solid occurs naturally as the mineral pyrolusite, which is the main ore of manganese and a component of manganese nodules. The principal use for MnO.