Gypsum is a soft mineral (2H2O∙CaSO4). It is hardened and pressed between 2 paper liners to form a panel of drywall. Naturally occurring mineral gypsum forms when a body of water slowly evaporates. Synthetic gypsum is derived from the by-products of electric power plants. Nearly half of America’s electricity is produced from coal, generating about 130 million tons of waste each year. Coal-fired power plants recycle some waste through “scrubbers,” or chemical reactions that can oxidize and reduce the amount of sulfur in by-products of the coal combustion process to produce flue gas desulphurization (FGD), or synthetic, gypsum. Sulfur may be present in both natural and synthetic gypsum.
about the author
anna h. oshiro
- Anna H. Oshiro is a Director of Damon Key Leong Kupchak Hastert in Honolulu, Hawaii, and focuses on all aspects of Construction Law.
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