Influence of aqueous pH and ionic strength on the wettability of quartz in the presence of dense non-aqueous-phase liquids

被引：25

作者：

Barranco, FT ^{[1
]}

Dawson, HE ^{[1
]}

Christener, JM ^{[1
]}

Honeyman, BD ^{[1
]}

机构：

[1] COLORADO SCH MINES,ENVIRONM SCI & ENGN DIV,GOLDEN,CO 80401

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1997年 / 31卷 / 03期

关键词：

D O I：

10.1021/es960217m

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The location, distribution, and migration of non-aqueous-phase liquids (NAPLs) in porous media are strongly influenced by the wettability of aquifer solids. Changes in wettability can significantly affect capillary pressure, relative permeability, residual saturation, and fluid displacement potential. In this study, mineral wettability by DNAPLs was evaluated as a function of aqueous pH and ionic strength for a water-DNAPL-quartz system. Contact angle and DNAPL-water interfacial tension, which is related to contact angle, were experimentally determined for trichloroethylene and carbon tetrachloride in aqueous solutions of varying pH and ionic strength. Both DNAPLs exhibited the following results: Contact angles were at a maximum near the pH of the point of zero surface charge of quartz (pH similar to 2) and decreased as pH and ionic strength were increased. DNAPL-water interfacial tension was invariant with respect to pH and ionic strength (up to 0.1 M). Observed variations in contact angle yield calculated changes in capillary pressure as high as 10%, which may affect the mobility of DNAPLs in settings where capillary pressures are close to displacement entry pressures for porous media.

引用

页码：676 / 681

页数：6

共 43 条

[11]

DAVIS JA, 1990, MINERAL WATER INTERF, V23, pCH4

[12]

DAWSON HE, 1992, THESIS STANFORD U

[13] ESTIMATION OF INTERFACIAL-TENSION BETWEEN ORGANIC LIQUIDS AND WATER [J].

DEMOND, AH ;

LINDNER, AS .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1993, 27 (12) :2318-2331

[14] EFFECT OF CATIONIC SURFACTANTS ON ORGANIC LIQUID WATER CAPILLARY-PRESSURE SATURATION RELATIONSHIPS [J].

DEMOND, AH ;

DESAI, FN ;

HAYES, KF .

WATER RESOURCES RESEARCH, 1994, 30 (02) :333-342

[15] EFFECT OF INTERFACIAL FORCES ON 2-PHASE CAPILLARY PRESSURE-SATURATION RELATIONSHIPS [J].

DEMOND, AH ;

ROBERTS, PV .

WATER RESOURCES RESEARCH, 1991, 27 (03) :423-437

[16]

DEMOND AH, 1988, THESIS STANFORD U

[17] THE BOUNDARY TENSION AT WATER ORGANIC LIQUID INTERFACES [J].

DONAHUE, DJ ;

BARTELL, FE .

JOURNAL OF PHYSICAL CHEMISTRY, 1952, 56 (04) :480-489

[18]

Ethington E.F, 1990, 90409 US GEOL SURV

[19] ADDITIVITY OF INTERMOLECULAR FORCES AT INTERFACES .1. DETERMINATION OF CONTRIBUTION TO SURFACE AND INTERFACIAL TENSIONS OF DISPERSION FORCES IN VARIOUS LIQUIDS [J].

FOWKES, FM .

JOURNAL OF PHYSICAL CHEMISTRY, 1963, 67 (12) :2538-&

[20] COMMENTS ON CALCULATION OF COHESIVE AND ADHESIVE ENERGIES BY PADDAY,JF AND UFFINDELL,ND [J].

FOWKES, FM ;

PADDAY, JF ;

UFFINDEL, ND .

JOURNAL OF PHYSICAL CHEMISTRY, 1968, 72 (10) :3700-&

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