Mechanistic modeling of chromate adsorption onto goethite

被引：50

作者：

Weerasooriya, R ^{[1
]}

Tobschall, HJ

机构：

[1] Univ Erlangen Nurnberg, Inst Geol & Mineral, Lehrstuhl Angew Geol, D-91054 Erlangen, Germany

[2] Inst Fundamental Studies, Chem Modeling Lab, Kandy, Sri Lanka

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2000年 / 162卷 / 1-3期

关键词：

chromate; goethite; three-plane model; inner-sphere complex; outer-sphere complex;

D O I：

10.1016/S0927-7757(99)00229-0

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：

We have investigated the adsorption of CrO42- onto goethite as a function of pH, background electrolyte and adsorbate loading. Experimental data were interpreted with a three-plane model (TPM) that accounts for spatial charge distribution of inner-sphere surface complexes. In accordance with EXAF spectroscopic data [S. Fendorf, M.J. Eick, P. Grossl, D.L. Sparks, Environ. Sci. Technol. 31 (1997) 315], > (FeOCrO3-1.3)-Cr-0.2 and (> FeO)(2)(CrO2-0.6)-Cr-0.4 surface species were selected for TPM calculations. TPM simulations replicate CrO42- adsorption data well when CrO42- coverage was <2 x 10(-7) mol m(-2). (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：167 / 175

页数：9

共 21 条

[1] An XPS study of the adsorption of chromate on goethite (alpha-FeOOH) [J].

AbdelSamad, H ;

Watson, PR .

APPLIED SURFACE SCIENCE, 1997, 108 (03) :371-377

[2] CHROMATE ADSORPTION ON GOETHITE - EFFECTS OF ALUMINUM SUBSTITUTION [J].

AINSWORTH, CC ;

GIRVIN, DC ;

ZACHARA, JM ;

SMITH, SC .

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1989, 53 (02) :411-418

[3] TESTING A MECHANISTIC MODEL .7. THE EFFECTS OF PH AND OF ELECTROLYTE ON THE REACTION OF SELENITE AND SELENATE WITH A SOIL [J].

BARROW, NJ ;

WHELAN, BR .

JOURNAL OF SOIL SCIENCE, 1989, 40 (01) :17-28

[4] BEHAVIOR OF CHROMIUM IN SOILS .2. HEXAVALENT FORMS [J].

BARTLETT, RJ ;

KIMBLE, JM .

JOURNAL OF ENVIRONMENTAL QUALITY, 1976, 5 (04) :383-386

[5] Arsenate and chromate retention mechanisms on goethite .1. Surface structure [J].

Fendorf, S ;

Eick, MJ ;

Grossl, P ;

Sparks, DL .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1997, 31 (02) :315-320

[6] MODELING IONIC-STRENGTH EFFECTS ON CATION ADSORPTION AT HYDROUS OXIDE-SOLUTION INTERFACES [J].

HAYES, KF ;

LECKIE, JO .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1987, 115 (02) :564-572

[7] A surface structural approach to ion adsorption: The charge distribution (CD) model [J].

Hiemstra, T ;

VanRiemsdijk, WH .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1996, 179 (02) :488-508

[8] MULTISITE PROTON ADSORPTION MODELING AT THE SOLID-SOLUTION INTERFACE OF (HYDR)OXIDES - A NEW APPROACH .2. APPLICATION TO VARIOUS IMPORTANT (HYDR)OXIDES [J].

HIEMSTRA, T ;

DEWIT, JCM ;

VANRIEMSDIJK, WH .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1989, 133 (01) :105-117

[9]

Lewis R.J., 1991, Carcinogenically Active Chemicals

[10] Comparison of 1-pK and 2-pK versions of surface complexation theory by the goodness of fit in describing surface charge data of (hydr)oxides [J].

Lutzenkirchen, J .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (20) :3149-3154

← 1 2 3 →