Physicochemical characterization of potential colloids from agricultural topsoils

被引：40

作者：

Séquaris, JM ^{[1
]}

Lewandowski, H ^{[1
]}

机构：

[1] Forschungszentrum Julich GmbH, Inst Chem & Dynam Geosphere 4, D-52425 Julich, Germany

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2003年 / 217卷 / 1-3期

关键词：

agricultural topsoils; soil fractionation; potential colloid; critical coagulation concentration; zeta potential; colloidal stability;

D O I：

10.1016/S0927-7757(02)00563-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A method based on sedimentation and centrifugation steps has been developed to fractionate agricultural topsoils after suspension in water. A high release of potential colloids has been observed with low Ca2+ concentration under soil solid-to-water weight ratio conditions higher than 1/3. The colloidal stability is characterized in terms of particle size and electrokinetic properties. There is no systematic effect of the colloid phase organic carbon content varying from 2 to 5% on the critical coagulation concentration (CCC) and zeta potential results. Consequently, the observed CCC was tested by the Derjaguin-Landau-Verwey-Overbeeck theory by taking into account physicochemical properties of the colloid phase mineral content. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：93 / 99

页数：7

共 16 条

[1]

[Anonymous], 1948, THEORY STABILITY LYO

[2] THE ROLE OF ORGANIC-MATTER AND IONIC COMPOSITION IN DETERMINING THE SURFACE-CHARGE OF SUSPENDED PARTICLES IN NATURAL-WATERS [J].

BECKETT, R ;

LE, NP .

COLLOIDS AND SURFACES, 1990, 44 :35-49

[3] Groundwater colloid properties: a global approach [J].

Degueldre, C ;

Triay, I ;

Kim, JI ;

Vilks, P ;

Laaksoharju, M ;

Miekeley, N .

APPLIED GEOCHEMISTRY, 2000, 15 (07) :1043-1051

[4] Colloid-facilitated transport of strongly sorbing contaminants in natural porous media: A laboratory column study [J].

Grolimund, D ;

Borkovec, M ;

Barmettler, K ;

Sticher, H .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1996, 30 (10) :3118-3123

[5] Aggregation and deposition kinetics of mobile colloidal particles in natural porous media [J].

Grolimund, D ;

Elimelech, M ;

Borkovec, M .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2001, 191 (1-2) :179-188

[6] Mineralogical and physicochemical differences between mobile and nonmobile colloidal phases in reconstructed pedons [J].

Kaplan, DI ;

Bertsch, PM ;

Adriano, DC .

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1997, 61 (02) :641-649

[7] PESTICIDES IN SHALLOW GROUNDWATER IN THE DELMARVA PENINSULA [J].

KOTERBA, MT ;

BANKS, WSL ;

SHEDLOCK, RJ .

JOURNAL OF ENVIRONMENTAL QUALITY, 1993, 22 (03) :500-518

[8] Mobile subsurface colloids and their role in contaminant transport [J].

Kretzschmar, R ;

Borkovec, M ;

Grolimund, D ;

Elimelech, M .

ADVANCES IN AGRONOMY, VOL 66, 1999, 66 :121-193

[9]

Kretzschmar R., 1998, PHYS CHEM EARTH, V23, P133, DOI DOI 10.1016/S0079-1946(98)00003-2

[10]

Lagaly G., 1997, DISPERSIONEN EMULSIO

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