Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun inorganic chemistry A form of
gypsum (calcium sulfate ) formed as aby-product in the manufacture ofphosphate fertilizers
Etymologies
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Examples
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The latter is called phosphogypsum, which contains more water than natural gypsum, is more acidic and has more impurities, so that costly processing is required.
Chapter 4 1988
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At the heart of the dispute is iron phosphogypsum, a crumbly, off-white waste product.
Malaysia Stalls New Project David Fickling 2011
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When Gebeng hits full capacity it will produce 20,000 tons of rare-earth materials and 64,000 tons of phosphogypsum every year—enough to cover a one-hectare site to a depth of five stories.
Malaysia Stalls New Project David Fickling 2011
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Copies of Chinese customs reports obtained by The Times indicate that drywall made with phosphogypsum was shipped to the U.S. in 2006 by at least four Chinese-based manufacturers and trading firms.
Homeowners seek remedy as probe of Chinese drywall continues 2009
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Copies of Chinese customs reports obtained by The Times indicate that drywall made with phosphogypsum was shipped to the U.S. in 2006 by at least four Chinese-based manufacturers and trading firms.
Homeowners seek remedy as probe of Chinese drywall continues 2009
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The Los Angeles Times reported this week that some experts believe the problematic drywall was made using a radioactive phosphorus substance—phosphogypsum—that is banned for construction use in the U.S. but has been used by Chinese manufacturers for almost a decade.
Homeowners seek remedy as probe of Chinese drywall continues 2009
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"The health risk of phosphogypsum is uncertain," the newspaper reported.
Homeowners seek remedy as probe of Chinese drywall continues 2009
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The Los Angeles Times reported this week that some experts believe the problematic drywall was made using a radioactive phosphorus substance — phosphogypsum — that is banned for construction use in the U.S. but has been used by Chinese manufacturers for almost a decade.
Homeowners seek remedy as probe of Chinese drywall continues 2009
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"The health risk of phosphogypsum is uncertain," the newspaper reported.
Homeowners seek remedy as probe of Chinese drywall continues 2009
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For every ton of P2O5 produced as phosphoric acid about 4 to 5 tons of phosphogypsum containing 10 to 40 per cent free moisture is obtained.
4. Innovative technologies related to recycling of materials 1995
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