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  2. Phosphogypsum - Wikipedia

    en.wikipedia.org/wiki/Phosphogypsum

    On the other hand, it includes several valuable components—calcium sulphates and elements such as silicon, iron, titanium, magnesium, aluminum, and manganese. [1] However, the long-term storage of phosphogypsum is controversial. [2] About five tons of phosphogypsum are generated per ton of phosphoric acid production.

  3. Calcium sulfate - Wikipedia

    en.wikipedia.org/wiki/Calcium_sulfate

    Calcium sulfate (or calcium sulphate) is the inorganic compound with the formula CaSO 4 and related hydrates. In the form of γ- anhydrite (the anhydrous form), it is used as a desiccant . One particular hydrate is better known as plaster of Paris , and another occurs naturally as the mineral gypsum .

  4. Microbiologically induced calcite precipitation - Wikipedia

    en.wikipedia.org/wiki/Microbiologically_induced...

    Microbiologically induced calcium carbonate precipitation (MICP) is a bio-geochemical process that induces calcium carbonate precipitation within the soil matrix. [1] Biomineralization in the form of calcium carbonate precipitation can be traced back to the Precambrian period. [ 2 ]

  5. Sulfur assimilation - Wikipedia

    en.wikipedia.org/wiki/Sulfur_assimilation

    Regulation and expression of the majority of sulfate transporters are controlled by the sulfur nutritional status of the plants. [8] Upon sulfate deprivation, the rapid decrease in root sulfate is regularly accompanied by a strongly enhanced expression of most sulfate transporter genes (up to 100-fold), accompanied by a substantially enhanced ...

  6. Fouling - Wikipedia

    en.wikipedia.org/wiki/Fouling

    An example of the temperature dependence of solubility is shown in the figure. Calcium sulfate is a common precipitation foulant of heating surfaces due to its retrograde solubility. Precipitation fouling can also occur in the absence of heating or vaporization. For example, calcium sulfate decreases its solubility with decreasing pressure.

  7. Biomineralization - Wikipedia

    en.wikipedia.org/wiki/Biomineralization

    Fossil skeletal parts from extinct belemnite cephalopods of the Jurassic – these contain mineralized calcite and aragonite.. Biomineralization, also written biomineralisation, is the process by which living organisms produce minerals, [a] often resulting in hardened or stiffened mineralized tissues.

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  9. Kraft process - Wikipedia

    en.wikipedia.org/wiki/Kraft_process

    The kraft process (also known as kraft pulping or sulfate process) is a process for conversion of wood into wood pulp, which consists of almost pure cellulose fibres, the main component of paper. The kraft process involves treatment of wood chips with a hot mixture of water, sodium hydroxide (NaOH), and sodium sulfide (Na 2 S), known as white ...