土壤气相抽提过程非水相液体与气相的传质动力学研究

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土壤气相抽提过程非水相液体与气相的传质动力学研究

李鑫钢; 黄国强; 沈铁孟

National Engineering Research Center for Distillation Technology, Tianjin University
Tianjin, 300072, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-10-28 发布日期:2002-10-28
通讯作者: 李鑫钢

Kinetic Mass Transfer Between Non-aqueous Phase Liquid and Gas During Soil Vapor Extraction

LI Xingang; HUANG Guoqiang; SHEN Tiemeng

National Engineering Research Center for Distillation Technology, Tianjin University
Tianjin, 300072, China

Received:1900-01-01 Revised:1900-01-01 Online:2002-10-28 Published:2002-10-28
Contact: LI Xingang

摘要/Abstract

摘要： The mass transfer between non-aqueous phase liquid(NAPL) phase and soil gas phase in soil
vapor extraction(SVE) process has been investigated by one-dimensional venting experiments.
During quasi-steady volatilization of three single-component NAPLs in a sandy soil,
constant initial lumped mass transfer coefficient (λgN,0) canbe obtained if the relative
saturation (ξ) between NAPL phase and gas phase is higher than a critical value (ξc),
andthe lumped mass transfer coefficient decreases with ξ when ξ＜ξc. It is also shown
that the lumped mass transfercoefficient can be increased by blending porous micro-
particles into the sandy soil because of the increasing of theinterfacial area.

关键词: kinetic mass transfer;soil vapor extraction;non-aqueous phase liquid;soil remediation

Abstract: The mass transfer between non-aqueous phase liquid(NAPL) phase and soil gas phase in soil
vapor extraction(SVE) process has been investigated by one-dimensional venting experiments.
During quasi-steady volatilization of three single-component NAPLs in a sandy soil,
constant initial lumped mass transfer coefficient (λgN,0) canbe obtained if the relative
saturation (ξ) between NAPL phase and gas phase is higher than a critical value (ξc),
andthe lumped mass transfer coefficient decreases with ξ when ξ＜ξc. It is also shown
that the lumped mass transfercoefficient can be increased by blending porous micro-
particles into the sandy soil because of the increasing of theinterfacial area.

Key words: kinetic mass transfer, soil vapor extraction, non-aqueous phase liquid, soil remediation

李鑫钢, 黄国强, 沈铁孟. 土壤气相抽提过程非水相液体与气相的传质动力学研究[J]. CIESC Journal.

LI Xingang, HUANG Guoqiang, SHEN Tiemeng. Kinetic Mass Transfer Between Non-aqueous Phase Liquid and Gas During Soil Vapor Extraction[J]. .

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土壤气相抽提过程非水相液体与气相的传质动力学研究

Kinetic Mass Transfer Between Non-aqueous Phase Liquid and Gas During Soil Vapor Extraction

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