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

[1] LONG-TERM SORPTION OF HALOGENATED ORGANIC-CHEMICALS BY AQUIFER MATERIAL .1. EQUILIBRIUM [J].

BALL, WP ;

ROBERTS, PV .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1991, 25 (07) :1223-1237

[2] MODELING VAPOR EXTRACTION AND GENERAL TRANSPORT IN THE PRESENCE OF NAPL MIXTURES AND NONIDEAL CONDITIONS [J].

BENSON, DA ;

HUNTLEY, D ;

JOHNSON, PC .

GROUND WATER, 1993, 31 (03) :437-445

[3]

BUSS E, 1991, CHEM TECH-LEIPZIG, V43, P10

[4]

CRITTENDEN JC, 1985, ENVIRON SCI TECHNOL, V19, P1037, DOI 10.1021/es00141a002

[5] Effects of grain-scale mass transfer on the transport of volatile organics through sediments .1. Model development [J].

Cunningham, JA ;

Werth, CJ ;

Reinhard, M ;

Roberts, PV .

WATER RESOURCES RESEARCH, 1997, 33 (12) :2713-2726

[6] DESORPTION OF HALOGENATED ORGANICS FROM MODEL SOLIDS, SEDIMENTS, AND SOIL UNDER UNSATURATED CONDITIONS .1. ISOTHERMS [J].

FARRELL, J ;

REINHARD, M .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1994, 28 (01) :53-62

[7] DESORPTION OF HALOGENATED ORGANICS FROM MODEL SOLIDS, SEDIMENTS, AND SOIL UNDER UNSATURATED CONDITIONS .2. KINETICS [J].

FARRELL, J ;

REINHARD, M .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1994, 28 (01) :63-72

[8]

Farrell J, 1999, ENVIRON TOXICOL CHEM, V18, P1637, DOI [10.1897/1551-5028(1999)018&lt

[9]

1637:TIOTAI&gt

[10]

2.3.CO

← 1 2 3 4 5 →