Evaluation of polyethylene hollow-fiber membranes for hydrogen delivery to support reductive dechlorination in a soil column

Water Research
X MaR M Hozalski

Abstract

Engineered systems are often needed to supply an electron donor, such as hydrogen (H(2)), to the subsurface to stimulate the biological dehalogenation of perchloroethene (PCE) to ethene. A column study was performed to evaluate the ability of gas permeable hollow-fiber membranes to supply H(2) directly to PCE-contaminated groundwater to facilitate bioremediation. Two glass columns were packed with soil obtained from a trichloroethene-contaminated site at Cape Canaveral, Florida, and were fed a minimal medium spiked with PCE (7 microM) for 391 days. The columns were operated in parallel, with one column receiving H(2) via polyethylene hollow-fiber membranes (lumen H(2) pressure of approximately 1atm) and a control column receiving no H(2). PCE was initially dechlorinated at a similar rate and to a similar extent in both columns, likely due to the presence of soil organic matter that was able to support dechlorination. After 265 days of operation, dechlorination performance declined in the control column and the benefits of membrane-supplied H(2) became evident. Although the membrane-supplied H(2) effectively stimulated PCE dechlorination at the end of the experiment (days 359-391), the system was inefficient in that only 5% of t...Continue Reading

References

Jun 6, 1997·Science·P L McCarty
Mar 31, 2000·Biological Reviews of the Cambridge Philosophical Society·D E Hathway

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Citations

Sep 15, 2012·Microbial Cell Factories·Anca G DelgadoRosa Krajmalnik-Brown
Nov 6, 2012·Water Research·Chan Lan ChunHarold D May
Aug 4, 2015·Environmental Science and Pollution Research International·Li-Lian WenHe-Ping Zhao
Aug 29, 2012·Biotechnology and Bioengineering·Julie C ChambonPhilip J Binning
Apr 28, 2016·Environmental Science and Pollution Research International·Van Khanh NguyenTaeho Lee
Feb 6, 2017·Applied and Environmental Microbiology·Xinwei MaoLisa Alvarez-Cohen
Jun 18, 2005·Brain Research. Brain Research Reviews·Ning ZhangXuejun Wen

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