A note on the chemistry of seawater in the range 350°–500°C
A note on the chemistry of seawater in the range 350°–500°C
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关于 350°–500°C 范围内海水化学性质的注释
DOI：
10.1016/0016-7037(83)90098-4
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发表时间：
1983
影响因子：
5
通讯作者：
R. Rosenbauer
中科院分区：
文献类型：
--
作者：
J. Bischoff;R. Rosenbauer
海水在350°至500° C、220至1000巴（22至100 MPa）条件下的化学性质由氢氧化硫酸镁（MHSH）和硬石膏的反应控制。在1000巴（100 MPa）下从350° C逐步加热至500° C的过程中，通过从溶液中沉淀以及通过溶液与预先存在的硬石膏反应形成MgSO 4比率为1.25的MHSH。在绝热膨胀过程中，MHSH从海水中提取额外的SO 4，并转换为MgSO 4= 1.16的化学计量。这些反应控制并极大地改变了溶液中Ca、Mg、SO 4的浓度，并产生大量的可电离氢，在最大条件下达到11.7 mmol kg− 1。
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 Mg SO 4 ratio of 1.25 is formed via precipitation from solution and via reaction of solution with pre-existing anhydrite. During adiabatic expansion the MHSH extracts additional SO 4 from seawater and converts to a stoichiometry in which Mg SO 4= 1.16. These reactions control and greatly change the concentrations of Ca, Mg, SO 4 in solution and produce significant ionizable hydrogen, attaining 11.7 mmoles kg− 1 at maximum conditions.