Iron(III) solubility and speciation in aqueous solutions.: Experimental study and modelling:: Part 1.: Hematite solubility from 60 to 300°C in NaOH-NaCl solutions and thermodynamic properties of Fe(OH)4-(aq)

被引：75

作者：

Diakonov, II ^{[1
]}

Schott, J ^{[1
]}

Martin, F ^{[1
]}

Harrichourry, JC ^{[1
]}

Escalier, J ^{[1
]}

机构：

[1] Univ Toulouse 3, Lab Geochim, CNRS UMR 5563 OMP, F-31400 Toulouse, France

来源：

GEOCHIMICA ET COSMOCHIMICA ACTA | 1999年 / 63卷 / 15期

关键词：

D O I：

10.1016/S0016-7037(99)00070-8

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The solubility of natural and synthetic hematite (alpha-Fe2O3) was measured in NaOH-NaCI solutions (0.007 less than or equal to m(NaOH) less than or equal to 2.0) between 60 and 300 degrees C at saturated water vapour pressure and under excess oxygen. Solubility constants determined in the present study and by Yishan et al. (1986) at 300 degrees C were combined with the thermodynamic properties of hematite (Hemin,away, 1990) and water (SUPCRT92, Johnson ct al., 1992) to generate within the framework of the revised Helgeson-Kirkham-Flowers (HKF) model the standard partial molal thermodynamic properties at 25 degrees C and 1 bar, and the revised HKF equations of state parameters of Fe(OH)(4)-. The extrapolated value for the Gibbs energy of formation for Fe(OH)(4)- at 25 degrees C is -201.97 kcal/mol. Thermodynamic calculations show that Fe(OH)(4)- exhibits a chemical behaviour different from that of Ga(OH)(4)- and Al(OH)(4)-. Copyright (C) 1999 Elsevier Science Ltd.

引用

页码：2247 / 2261

页数：15

共 59 条

[21] THEORETICAL PREDICTION OF THE THERMODYNAMIC BEHAVIOR OF AQUEOUS-ELECTROLYTES AT HIGH-PRESSURES AND TEMPERATURES .4. CALCULATION OF ACTIVITY-COEFFICIENTS, OSMOTIC COEFFICIENTS, AND APPARENT MOLAL AND STANDARD AND RELATIVE PARTIAL MOLAL PROPERTIES TO 600-DEGREES-C AND 5 KB [J].

HELGESON, HC ;

KIRKHAM, DH ;

FLOWERS, GC .

AMERICAN JOURNAL OF SCIENCE, 1981, 281 (10) :1249-1516

[22]

HEMINGWAY BS, 1990, AM MINERAL, V75, P781

[23] Ion association of dilute aqueous sodium hydroxide solutions to 600 degrees C and 300 MPa by conductance measurements [J].

Ho, PC ;

Palmer, DA .

JOURNAL OF SOLUTION CHEMISTRY, 1996, 25 (08) :711-729

[24] THERMODYNAMICS OF AQUEOUS ALUMINATE ION - STANDARD PARTIAL MOLAR HEAT-CAPACITIES AND VOLUMES OF AL(OH)4-(AQ) FROM 10-DEGREES-C TO 55-DEGREES-C [J].

HOVEY, JK ;

HEPLER, LG ;

TREMAINE, PR .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (05) :1323-1332

[25]

HOVEY JK, 1988, THESIS U ALBERTA

[26] SUPCRT92 - A SOFTWARE PACKAGE FOR CALCULATING THE STANDARD MOLAL THERMODYNAMIC PROPERTIES OF MINERALS, GASES, AQUEOUS SPECIES, AND REACTIONS FROM 1-BAR TO 5000-BAR AND 0-DEGREES-C TO 1000-DEGREES-C [J].

JOHNSON, JW ;

OELKERS, EH ;

HELGESON, HC .

COMPUTERS & GEOSCIENCES, 1992, 18 (07) :899-947

[27]

Kamnev A.A., 1986, ZH PRIKL KHIM, V8, P1689

[28] SOLUBILITY AND DISSOLUTION RATE OF COLLOIDAL GAMMA-FEOOH IN SEAWATER [J].

KUMA, K ;

SUZUKI, Y ;

MATSUNAGA, K .

WATER RESEARCH, 1993, 27 (04) :651-657

[29] DIE ERMITTLUNG DER LOSLICHKEIT VON EISEN(III)-HYDROXIDEN MIT 59FE I - FALLUNGS- UND AUFLOSUNGSVERSUCHE [J].

LENGWEILER, H ;

FEITKNECHT, W ;

BUSER, W .

HELVETICA CHIMICA ACTA, 1961, 44 (03) :796-+

[30] DIE ERMITTLUNG DER LOSLICHKEIT VON EISEN(III)-HYDROXIDEN MIT 59FE II - DER ZUSTAND KLEINSTER MENGEN EISEN(III)-HYDROXID IN WASSERIGER LOSUNG [J].

LENGWEILER, H ;

FEITKNECHT, W ;

BUSER, W .

HELVETICA CHIMICA ACTA, 1961, 44 (03) :805-+

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