Calibrating the uptake kinetics of semipermeable membrane devices in water:: Impact of hydrodynamics

被引：99

作者：

Vrana, B ^{[1
]}

Schüürmann, G ^{[1
]}

机构：

[1] UFZ Helmholtz Ctr Environm Res, Dept Chem Ecotoxicol, D-04318 Leipzig, Germany

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2002年 / 36卷 / 02期

关键词：

D O I：

10.1021/es0100625

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The use of lipid-containing semipermeable membrane devices (SPMDs) is becoming commonplace, but the potential effects of environmental variables affecting the accumulation of contaminants into SPMDs had not been characterized sufficiently, yet. To characterize the effect of hydrodynamic conditions on the contaminant uptake kinetics, accumulation of pentachlorobenzene, hexachlorobenzene, and hexachlorocyclohexane isomers from water into SPMD was studied at various water flow rates, The accumulation kinetics of hydrophobic compounds (log K-ow > 4) are governed by the aqueous boundary layer in linear flow velocity range from 0.06 to 0.28 cm s(-1) and sensitive to slight changes in flow rate. The effect of flow velocity on the exchange kinetics increases with increasing hydrophobicity. Under faster, but still laminar flow conditions (0.28-1.14 cm s(-1)), the sensitivity to changes in flow decreases to a nonsignificant level for the substances under consideration. The results of this study confirm that the use of the laboratory-derived calibration data for estimation of analyte concentrations in the ambient environment is limited unless flow-sensitive performance reference compounds are used.

引用

页码：290 / 296

页数：7

共 20 条

[11]

HUCKINS JN, 1997, 18 ANN M SETAC SAN F

[12] Mass transfer characteristics of solvent extraction into a single drop at the tip of a syringe needle [J].

Jeannot, MA ;

Cantwell, FF .

ANALYTICAL CHEMISTRY, 1997, 69 (02) :235-239

[13]

LEVICH VG, 1962, PHYSICOCHEM HYDRODYN, P301

[14]

Lyman W.J., 1982, Handbook of Chemical Property Estimation methods: Environmental Behavior of Organic Compounds

[15] CALCULATING FUGACITY [J].

MACKAY, D ;

PATERSON, S .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1981, 15 (09) :1006-1014

[16] 3-PARAMETER EQUATION DESCRIBING THE UPTAKE OF ORGANIC-COMPOUNDS BY FISH [J].

MACKAY, D ;

HUGHES, AI .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1984, 18 (06) :439-444

[17]

Mackay D., 1997, ILLUSTRATED HDB PHYS, V5

[18]

MACKAY D, 1992, ILLUSTRATED HDB PHYS, V1

[19] Estimation of uptake rate constants for PCB congeners accumulated by semipermeable membrane devices and brown trout (Salmo trutta) [J].

Meadows, JC ;

Echols, KR ;

Huckins, JN ;

Borsuk, FA ;

Carline, RF ;

Tillitt, DE .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (12) :1847-1852

[20] Use of semipermeable membrane devices (SPMDs) -: Determination of bioavailable, organic, waterborne contaminants in the industrial region of Bitterfeld, Saxony-Anhalt, Germany [J].

Vrana, B ;

Paschke, A ;

Popp, P ;

Schüürmann, G .

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2001, 8 (01) :27-34

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