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InvisibleCaptain Cubensis
Bleeding HeartLiberal


Registered: 09/18/07
Posts: 648
The difference between Drywall and Natural Gyspum.
    #7849039 - 01/08/08 05:00 PM (16 years, 2 months ago)

Here is a nice litte study done by Ohio State.

http://ohioline.osu.edu/anr-fact/0020.html

Drywall gypsum
Drywall consists of gypsum with a thin paper backing. About 30 billion square feet of gypsum wallboard are manufactured each year in North America, and a considerable quantity is discarded during the construction of homes, offices, and other structures. Up to 25% of the waste produced at new construction sites is drywall material. The recycled drywall analyzed in this study was obtained entirely from new construction projects and is regularly monitored by the Ohio Department of Agriculture as a fertilizer. The samples contained quartz, calcium hydroxide [Ca(OH)2] or portlandite, and calcium carbonate (CaCO3) or calcite (Table 1). Demolition drywall is another possible source of gypsum but should probably be avoided for land application because of potential chemical contamination from paint or other wall coverings.


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Invisiblemycopsycho
Tit Inspector.
Male

Folding@home Statistics
Registered: 06/17/04
Posts: 3,712
Loc: Going Nowhere Fast
Re: The difference between Drywall and Natural Gyspum. [Re: Captain Cubensis]
    #7849066 - 01/08/08 05:04 PM (16 years, 2 months ago)

this is actually surprising to me. i never knew that drywall was basically gypsum.


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I Am The Sickness.

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OfflineCheesekiller
Mad Scientist
Male


Registered: 11/08/04
Posts: 485
Loc: Central NY
Last seen: 2 months, 29 days
Re: The difference between Drywall and Natural Gyspum. [Re: mycopsycho]
    #7849138 - 01/08/08 05:13 PM (16 years, 2 months ago)



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InvisibleCaptain Cubensis
Bleeding HeartLiberal


Registered: 09/18/07
Posts: 648
Re: The difference between Drywall and Natural Gypsum. [Re: Cheesekiller]
    #7849320 - 01/08/08 05:40 PM (16 years, 2 months ago)

Well, natural has more lead, but drywall has more arsenic.

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