Applications of gypsum and phosphogypsum
- Univ. of Georgia, Athens, GA (United States)
Relatively pure gypsum (CaSO{sub 4}-2H{sub 2}O) is produced in large amounts world-wide by processing of phosphatic fertilizers and SO{sub 2} removal from coal-fired power plant gas streams. There are a number of potential beneficial uses of these materials in both industrial manufacturing, the construction industry, and in agriculture. By-product gypsums may be used in wallboard manufacture to replace mined gypsum, although the supply far exceeds demand for this use. Gypsum may also be used as an additive in cement formulation, and has shown promise as a sub-base material in road construction. In agriculture, the high Ca content is beneficial for a number of crops grown on acidic soils, and gypsum treatments improve the physical conditions of soils by enhancing flocculation of soil colloids. The agricultural market should expand as new experimental results show yield responses on various soils and crops. Environmental questions regarding radioactivity hazards in phosphogypum are still unresolved, however, and use of this material is pending EPA review.
- OSTI ID:
- 538998
- Report Number(s):
- CONF-960807-; TRN: 97:004029-0066
- Resource Relation:
- Conference: 212. national meeting of the American Chemical Society (ACS), Orlando, FL (United States), 25-30 Aug 1996; Other Information: PBD: 1996; Related Information: Is Part Of 212th ACS national meeting; PB: 1830 p.
- Country of Publication:
- United States
- Language:
- English
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