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Calcium Solubility In Zeolite Synthetic-Apatite MixturesLife support systems at a lunar or martian outpost will require the ability to produce food growing in 1) treated lunar or martian regolith; 2) a synthetic soil, or 3) some combination of both. Zeoponic soil, composed of NH4 (-) and K-exchanged clinoptilolite (Cp) and synthetic apatite (Ap), can provide slow-release fertilization via dissolution and ion-exchange. Equilibrium studies indicate that KNH4, P, and Mg are available to plants at sufficient levels, however, Ca is deficient. Ca availability can be increased by adding a second Ca-bearing mineral: calcite (Cal); dolomite (Dol); or wollastonite (Wol). Additions of Cal, Dol, and Wol systematically change the concentrations of Ca and P in solution. Cal has the greatest effect, Dol the least, and Wol is intermediate.
Document ID
Document Type
Preprint (Draft being sent to journal)
Beiersdorfer, R.
(Youngstown State Univ. OH United States)
Ming, D. W.
(NASA Johnson Space Center Houston, TX United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Inorganic, Organic And Physical Chemistry
Meeting Information
Meeting: Science Serving Agriculture and Natural Resources, Past/Present
Location: Salt Lake City, UT
Country: United States
Start Date: October 30, 1999
End Date: November 4, 1999
Sponsors: American Society of Agronomy
Funding Number(s)
PROJECT: RTOP 131-50-20-23
Distribution Limits
Work of the US Gov. Public Use Permitted.

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