Transport Modeling of Membrane Extraction of Chlorinated Hydrocarbon from Water for Ion Mobility Spectrometry

Journal Article · Fri Jan 01 04:00:00 EST 2010 · International Journal for Ion Mobility Spectrometry, The

DOI:https://doi.org/10.1007/s12127-010-0041-x· OSTI ID:1000419

Zhang, Wei ^[1]; Du, Yongzhai ^[1]; Feng, Zhili ^[1]; Xu, Jun ^[1]

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1. ORNL

Membrane-extraction Ion Mobility Spectrometry (ME-IMS) is a feasible technique for the continuous monitoring of chlorinated hydrocarbons in water. This work studies theoretically the time-dependent characteristics of sampling and detection of trichloroethylene (TCE). The sampling is configured so that aqueous contaminants permeate through a hollow polydimethylsiloxane (PDMS) membrane and are carried away by a transport gas flowing through the membrane tube into IMS analyzer. The theoretical study is based on a two-dimensional transient fluid flow and mass transport model. The model describes the TCE mixing in the water, permeation through the membrane layer, and convective diffusion in the air flow inside membrane tube. The effect of various transport gas flow rates on temporal profiles of IMS signal intensity is investigated. The results show that fast time response and high transport yield can be achieved for ME-IMS by controlling the flow rate in the extraction membrane tube. These modeled time-response profiles are important for determining duty cycles of field-deployable sensors for monitoring chlorinated hydrocarbons in water.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: ORNL work for others
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1000419
• Journal Information: International Journal for Ion Mobility Spectrometry, The, Journal Name: International Journal for Ion Mobility Spectrometry, The Journal Issue: 7 Vol. 13; ISSN 1865-4584; ISSN 1435-6163
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
CHLORINATED ALIPHATIC HYDROCARBONS
FLOW MODELS
ION MOBILITY
ION SPECTROSCOPY
MEMBRANE TRANSPORT
MEMBRANES
MONITORING
SAMPLING
WATER