Binary desorption isotherms of TCE and PCE from silica gel and natural solids

被引：18

作者：

Schaefer, CE ^{[1
]}

Schüth, C

Werth, CR

Reinhard, M

机构：

[1] Stanford Univ, Dept Civil & Environm Engn, Environm Engn & Sci Program, Stanford, CA 94305 USA

[2] Univ Tubingen, Inst Geol, Appl Geol Grp, D-72076 Tubingen, Germany

[3] Univ Illinois, Dept Civil Engn, Urbana, IL 61801 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2000年 / 34卷 / 20期

关键词：

D O I：

10.1021/es000875d

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Binary solute desorption isotherms of trichloroethylene (TCE) and tetrachloroethylene (PCE) at 100% relative humidity from silica gel and two well-characterized natural solids were investigated. Results indicated that the ideal adsorbed solution theory (IAST) was able to describe desorption isotherms for the silica gel. For the natural solids, IAST was not able to describe desorption isotherms for the full concentration range examined. Failure of IAST was greatest for the most heterogeneous sorbent, even when considering multiple sorption domains. In addition, IAST predictions worsened as nonlinear uptake mechanisms began to dominate. Several possible explanations for the failure of the IAST are given, including the possibility that complex interactions between the sorbing solutes and the sorbent may exist, causing deviations from ideal sorption behavior.

引用

页码：4341 / 4347

页数：7

共 41 条

[11]

2, 10.1002/etc.5620180805]

[12] EFFECTS OF RATE-LIMITED DESORPTION ON THE FEASIBILITY OF IN-SITU BIOREMEDIATION [J].

FRY, VA ;

ISTOK, JD .

WATER RESOURCES RESEARCH, 1994, 30 (08) :2413-2422

[13] DESORPTION OF TRICHLOROETHYLENE IN AQUIFER MATERIAL - RATE LIMITATION AT THE GRAIN SCALE [J].

GRATHWOHL, P ;

REINHARD, M .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1993, 27 (12) :2360-2366

[14] INFLUENCE OF PH, EXCHANGEABLE CATION AND PRESENCE OF ORGANIC MATTER ON ADSORPTION OF SOME HERBICIDES BY MONTMORILLONITE [J].

HANCE, RJ .

CANADIAN JOURNAL OF SOIL SCIENCE, 1969, 49 (03) :357-+

[15] Thermodynamic considerations in the sorption of organic contaminants by soils and sediments .1. The isosteric heat approach and its application to model inorganic sorbents [J].

Huang, WL ;

Weber, WJ .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1997, 31 (11) :3238-3243

[16] A distributed reactivity model for sorption by soils and sediments .9. General isotherm nonlinearity and applicability of the dual reactive domain model [J].

Huang, WL ;

Young, TM ;

Schlautman, MA ;

Yu, H ;

Weber, WJ .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1997, 31 (06) :1703-1710

[17] Dual-mode sorption model for single- and multisolute sorption onto organoclays [J].

Huh, JK ;

Song, DI ;

Jeon, YW .

SEPARATION SCIENCE AND TECHNOLOGY, 1999, 34 (04) :571-586

[18] ORGANIC POLLUTANT SORPTION IN AQUATIC SYSTEMS [J].

KARICKHOFF, SW .

JOURNAL OF HYDRAULIC ENGINEERING, 1984, 110 (06) :707-735

[19] SORPTION OF HYDROPHOBIC POLLUTANTS ON NATURAL SEDIMENTS [J].

KARICKHOFF, SW ;

BROWN, DS ;

SCOTT, TA .

WATER RESEARCH, 1979, 13 (03) :241-248

[20] Sorption of TCE by humic-preloaded activated carbon: Incorporating size-exclusion and pore blockage phenomena in a competitive adsorption model [J].

Kilduff, JE ;

Wigton, A .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1999, 33 (02) :250-256

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