Robert J. Rosenbauer
James L. Bischoff
1983
<p><span>The chemistry of seawater at conditions of 350° to 500°C, 220 to 1000 bars (22 to 100 MPa) is controlled by reactions involving magnesium hydroxide sulfate (MHSH) and anhydrite. During progressive heating from 350° to 500°C at 1000 bars (100 MPa), MHSH with a </span><span id="mmlsi1" class="mathmlsrc"><img class="imgLazyJSB inlineImage" title="" src="http://ars.els-cdn.com/content/image/1-s2.0-0016703783900984-si1.gif" alt="" width="60" height="18" data-inlimgeid="1-s2.0-0016703783900984-si1.gif" data-loaded="true" /></span><span> ratio of 1.25 is formed </span><i>via</i><span> precipitation from solution and via reaction of solution with pre-existing anhydrite. During adiabatic expansion the MHSH extracts additional SO</span><sub>4</sub><span> from seawater and converts to a stoichiometry in which </span><span id="mmlsi2" class="mathmlsrc"><img class="imgLazyJSB inlineImage" title="" src="http://ars.els-cdn.com/content/image/1-s2.0-0016703783900984-si2.gif" alt="" width="109" height="18" data-inlimgeid="1-s2.0-0016703783900984-si2.gif" data-loaded="true" /></span><span>. These reactions control and greatly change the concentrations of Ca, Mg, SO</span><sub>4</sub><span> in solution and produce significant ionizable hydrogen, attaining 11.7 mmoles kg</span><sup>−1</sup><span> at maximum conditions.</span></p>
application/pdf
10.1016/0016-7037(83)90098-4
en
Elsevier
A note on the chemistry of seawater in the range 350°-500°C
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