Professor Brent Sleep

Chair, Department of Civil Engineering

Environmental Engineering Icon  Environmental Section

Contact me

Brent Sleep
Dept. of Civil Engineering
University of Toronto
35 St. George St.
Toronto, Ontario
Canada, M5S 1A4

Tel: 416-978-3005
Fax: 416-978-6813

sleep@ecf.utoronto.ca

Research Interests

Biological and geochemical processes in soils; Computational methods for modelling environmental processes; Waste disposal and groundwater pollution modelling and remediation; Multiphase flow and transport in soils; Saturated and unsaturated groundwater flow modelling.

Environmental Section

INTEGRATE – Innovative Technologies for Groundwater Remediation

RENEW – Remediation Education Network

Education and Designations

B.A.Sc. (Waterloo)
M.A.Sc. (Waterloo)
Ph.D. (Waterloo)
P.Eng.

Research Associate Opportunity

 

Teaching

Course Code Title & Description Instructor Session Location(s) Day(s) Start Time End
CEM1000Y Prof. Brent Sleep TBA
CIV201H1 Prof. Jennifer Drake
Prof. Brent Sleep
Prof. Alan Chong
Fall 2016 Scheduled by the Office of the Faculty Registrar.

Research

My research interests are in the remediation of ground water contamination. Approaches include experimental studies and numerical modelling with a focus on bioremediation and thermal remediation.  Experimental studies range from microcosms to pilot scale. Current projects include laboratory studies of anaerobic biodegradation of DNAPL source zones, in situ chemical oxidation and biodegradation of DNAPL source zones, biodegradation of mixtures of halogenated organic compounds, isotopic fractionation associated with biological processes, biofilm growth in fractures, biofouling of wells, and biological processes in low permeability media.  Research funding is from a variety of government and industrial (Canadian and U.S.) sources.

Sequential Chemical Oxidation and Bioremediation

Sequential Chemical Oxidation and Bioremediation

Modelling of Conductive Heating

Modelling of Conductive Heating

Publications

Journals

 

  1. Kocur, C.M., Chowdhury, A.I., Sakulchaicharoen, N., Boparai, H.K., Weber, K.P., Sharma, P., Krol, M., Austrins, L., Peace, C., Sleep. B.E., O’Carroll, D.M.  Field scale injection, mobility, and characterization of carboxymethyl cellulose stabilized nanoscale zero valent iron particles. Accepted for Publication, ES&T.
  2. Kocur, C.M., O’Carroll, D.M., Sleep, B.E. (2013) Impact of nZVI stability on mobility in porous media. Journal of Contaminant Hydrology. 145, 17-25.
  3. Kokkinaki, A., O’Carroll, D. M., Werth, C. J. and Sleep, B. E. (2013) An evaluation of Sherwood-Gilland models for NAPL dissolution and relation their relationship to soil properties, Journal of Contaminant Hydrology,155: 87–98.
  4. Kokkinaki, A., O’Carroll, D. M., Werth, C. J. and Sleep, B. E. (2013) Coupled simulation of DNAPL infiltration and dissolution in three dimensional heterogeneous domains: process model validation. Water Resources Research, DOI: 10.1002/wrcr.20503.
  5. Krol, M.M., Oleniuk, A.J., Kocur, C.M., Sleep, B.E., Bennett, P., Xiong, Z., O’Carroll, D.M. (2013) A Field-Validated Model forIn SituTransport of Polymer-Stabilized nZVI and Implications for Subsurface Injection. Environmental Science and Technology, 47 (13) 7332-7340.
  6. Mondal, P. K. and Sleep, B. E. (2013) Colloid Transport in Dolomite Rock Fractures: Effects of Fracture Characteristics, Specific Discharge, and Ionic Strength, Environmental Science & Technology, 46(18): 9987-94.
  7. Mondal, P. K. and Sleep, B. E. (2013) Virus and Virus-Sized Microsphere Transport in a Dolomite Rock Fracture, Water Resources Research, 49: 808-824.Pensini, E., Sleep, B.E., Yip, C.M., O’Carroll, D. (2013) CMC binding to mineral substrates: Characterization by atomic force microscopy based – force spectroscopy and quartz-crystal microbalance with dissipation monitoring. Journal of Colloid and Interface Science. , 402, 58-67.
  8. Pensini, E., Sleep, B.E., Yip, C.M., O’Carroll, D. (2013) CMC binding to mineral substrates: Characterization by atomic force microscopy based – force spectroscopy and quartz-crystal microbalance with dissipation monitoring. Journal of Colloid and Interface Science. 402, 58-67.
  9. Pensini, E., Sleep, B. E., Yip, C. M., and O’Carroll, D. M. (2013) Forces of interaction between fresh iron particles and iron oxide (magnetite): effect of water chemistry and polymer coatings. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 433, 104-110, 2013.
  10. Pensini, E., Sleep, B. E., Yip, C. M. (2013) Forces of interactions between iron and aluminum silicates: effect of water chemistry and polymer coatings,. 411(1), 8 – 15, Journal of Colloid and Interface Science.
  11. Pensini, E., Yip, C.M., O’Carroll, D. M., and Sleep, B.E. (2012) Effect of Water Chemistry and Aging on Iron—Mica Interaction Forces: Implications for Iron Particle Transport. Langmuir, 28 (28), 10453–10463. doi: 10.1021/la301539q.
  12. Pensini, E., Sleep, B.E., Yip, C.M., O’Carroll, D. (2012) Forces of interactions between bare and polymer coated iron and silica: Effect of pH, ionic strength and humic acids. Environmental Science and Technology. 46(24)13401-13408.
  13. Zhi, D., Zhou, Z., and Sleep, B. E., (2013) Influence of wettability on interfacial area during immiscible liquid invasion into a 3D self-affine rough fracture: Lattice Boltzmann simulations. Advances in Water Resources, 61:1-11.
  14. O’Carroll, D., Sleep, B., Krol, M., Boparai, H., Kocur, C., (2012) Nanoscale zero valent iron and bimetallic particles for contaminated site remediation, Advances in Water Resources, 51:104-122. dx.doi.org/10.1016/j.advwatres.2012.02.005.
  15. Chowdhury, A. I. A., O’Carroll, D. M., Xua, Y., Sleep, B. E. (2012) Electrophoresis enhanced transport of nano-scale zero valent iron, Advances in Water Resources, 40, 71-82.
  16. Sedghi, M. M., Samani, N., and Sleep. B. E., Boundary depletion rate and drawdown in leaky wedge-shaped aquifers, in press,Hydrological   Processes, DOI 10.1002/hyp/8338, 2011.
  17. Starek, M., Kolev, K. I., , Berthiaume, L., Yeung, C. W., Sleep, B. E., Wolfaardt, G. M., Hausner, M. A flow cell simulating a subsurface rock fracture for  investigations of groundwater-derived biofilms, International Microbiology, 14(3), 163-171, 2011.
  18. Krol, M., M., Sleep, B. E., and Johnson, R. L.,  Impact of low temperature electrical resistance heating on subsurface flow and transport, Water Resources Research, 47, Article No. W05546, , 2011.
  19. Krol, M., M., Mumford, K. G., Johnson, R. L, and Sleep, B. E.,  Modeling discrete gas bubble formation and mobilization during subsurface heating of   contaminated zones, Advances in Water Resources, , 34, 537-549, 2011.
  20. Wang, A., Lin, R., Sleep, B. E., and Liss, S. N., The impact of biofilm growth on transport of E. coli O157:H7,  Ground Water, doi:   10.1111/j.1745-6584.2010.00690.x, 2010.
  21. Lima, G. P., and Sleep. B.E, The impact of carbon tetrachloride on an anaerobic methanol-degrading microbial community,Water, Air, and Soil   Pollution, 212(1-4), 357-368, 2010.
  22. Cullen, E., O’Carroll, D. M., Yanful, E. K., and Sleep, B. E., Simulation of the subsurface mobility of carbon nanoparticles at the field scale, Advances in  Water Resources, 33(4), 361-371, 2010.
  23. Morrill, P. A., Sleep, B.E., Seepersad, D.J., McMaster, M.L., Hood, E.D. LeBron, C., Major, D.W., Edwards, E.A., and Sherwood Lollar, B., Stable carbon isotope fractionation during reductive dechlorination of chlorinated ethenes close to a PCE DNAPL source, Journal of Contaminant Hydrology, 110(1-2), 60-71, 2009.
  24. Sedghi, M.M., Samani, N., and Sleep B., Three-dimensional semi-analytical solution to groundwater flow in confined and unconfined wedge-shaped  aquifers, Advances in Water Resources, 32(6), 925-935, 2009.
  25. O’Carroll, D. M., and Sleep, B. E., “Role of NAPL thermal properties in the effectiveness of hot water flooding, Transport in Porous Media, DOI 10.1007/s11242-008-9329-2, 2009.
  26. Ye S.J., Sleep, B. E., Chien C, The impact of methanogenesis on flow and transport in coarse sand, Journal of Contaminant Hydrology,  103 (1-2), pp. 48-57, 2009.
  27. Lima, G. P. and Sleep, B. E., The spatial distribution of Eubacteria and Archaea in sand-clay columns degrading carbon tetrachloride and methanol,  94(1-2), 34-48, Journal of Contaminant Hydrology, 2007.
  28. O’Carroll, D. M., and Sleep, B. E., Hot water flushing for immiscible displacement of a viscous NAPL,  Journal of Contaminant Hydrology,  91(3-4), pp. 247-266, 2007.
  29. Beranger, S. C., Sleep, B. E., Sherwood Lollar, B., Laboratory column study and inverse modeling of biodegradation and isotopic fractionation of tetrachloroethene, ASCE Journal of Environmental Engineering, 132(7), 725-735,  2006.
  30. Sleep, B. E., Seepersaad, D., Heidorn, C. M., Hrapovic, L., Morrill, P. L., Mo, K., McMaster, M. L., Hood,  E. E., LeBron, C., Major, D. W., Sherwood Lollar, B., Edwards, E. A., Biological enhancement of tetrachloroethene dissolution and associated microbial community changes, in press Environmental Science and Technology, 40(11), 2006.
  31. Morrill, P. L., Sleep, B. E., Slater, G. F., Edwards, E. A., and Sherwood Lollar, B., Carbon isotopic enrichment factors for modeling reductive dechlorination of PCE to ethene, Environmental Science and Technology, web release date: May 19, 2006.
  32. Beranger, S. C., Sleep, B. E., Sherwood Lollar, B., Laboratory Column Study and Inverse Modeling of Biodegradation and Isotopic Fractionation of Tetrachloroethene, in press, Journal of Environmental Engineering, April,  2006.
  33. Hrapovic, L., Sleep, B. E., Major, D. J., and Hood, E. D., Laboratory study of treatment of trichloroethene by chemical oxidation followed by bioremediation, Environmental Science and Technology, 39(8), 2888-2897, 2005.
  34. Morrill, P. L., Lacrampe-Couloume, G., Slater, G. F. Sleep, B. E.,  Edwards, E. A., McMaster, M L., Major, D. W., and Sherwood Lollar, B., Quantifying chloroethene mass degraded during reductive dechlorination using stable carbon isotopes at Kelly AFB,Journal of Contaminant Hydrology, 76(3-4), 279-293, 2005.
  35. Beranger, S. C., Sleep, B. E., Sherwood Lollar, B., Monteagudo, F. P., Transport, biodegradation and isotopic fractionation of chlorinated ethenes: modeling and parameter estimation, Advances in Water Resources, 28(1), 87-98, 2005.
  36. Sleep, B. E., Brown, A. J., Sherwood Lollar, B., Long term PCE degradation sustained by endogenous cell decay, Journal of Environmental Engineering and Science, 4, 11-17, 2005.
  37. Bagley, D. M., Sutherland, I. G., and Sleep, B. E., Impact of chlorofluorocarbon 113 on chlorinated ethene biodegradation,Bioremediation Journal, 8(1-2), 13-21, 2004.
  38. Bagley, D. M., Sutherland, I. G., and Sleep, B. E., Non-enzymatic degradation of chlorofluorocarbon 113 using cyanocobalamin under anaerobic conditions,  Journal of Environmental Engineering and Science, 3, 295-299, 2004.
  39. Dennis, P. C., Sleep, B. E., Fulthorpe, R. R., and Liss, S. N., Phylogenetic characterization of an anaerobic bacterial consortium capable of degrading high concentrations of tetrachloroethene, Canadian Journal of  Microbiology, 49(1), 15-27, 2003.
  40. Mancini, S. A., Ulrich., A. C., Lacrampe-Coulome, G., Sleep, B. E., Edwards, E. A., and Sherwood Lollar, B., Carbon and hydrogen isotopic fractionation during anaerobic biodegradation of benzene, Applied and Environmental Microbiology, 69(1), 191-198, 2003.
  41. Reinecke, S. A., Sleep, B. E., An experimental study of the relationship between Knudsen diffusion, gas permeability, and water content in an unconsolidated porous medium,  Water Resour. Res.,  38(12), 16-1 – 16-15, 2002.
  42. Hill, D. D., and Sleep, B. E., Effects of biofilm growth on flow and transport through a glass parallel plate fracture, J. Contam. Hydrol., 56, 3-4, 227-246, 2002.
  43. Sleep, B.E., and McClure, P.D., Removal of volatile and semivolatile organic contamination from soil by steam flushing,  J. Contam. Hydrol., 50(1-2), 21-40, 2001.
  44. Slater, G. F., Sherwood-Lollar, B., Sleep, B. E., Edwards, E. A., Variability in carbon isotopic fractionation during biodegradation of chlorinated ethenes: implications for field applications, Environ. Sci. and Technol., 35(5), 901-907, 2001.
  45. Morgan-Sagastume, F., Sleep, B. E., Allen, D. G., Effects of microbial growth on pressure drop in biofilters used to treat volatile organic compounds, A.S.C.E. J. Env. Eng., 127(5), 2001.
  46. Sleep, B.E., and McClure, P.D., The effect of temperature on adsorption of organic compounds to soils,  Canadian Geotech. J., 38(1), 46-52, 2001.
  47. Sherwood-Lollar, B., Slater, G. F., Sleep, B. E., Witt, M., Klecka, G. M., Harkness, M., Spivack, J., Stable carbon isotope evidence for intrinsic bioremediation of tetrachloroethene and trichloroethene at Area 6, Dover Air Force Base, Environ. Sci.and Tech.,  35(2), 261-269, 2001.
  48. Sleep, B.E., Sehayek, L., and, Chien, C., A modelling and experimental study of LNAPL accumulation in wells and LNAPL recovery from wells, Water Resour. Res., 36(12), 3535-3546, 2000.
  49. Slater, G. F., Ahad., J. M. E., Sherwood-Lollar, B., Allen-King, R., Sleep, B. E., Carbon isotope effects resulting from equilibrium sorption of dissolved VOCs,  Analytical Chemistry, 72, 5669-5672, 2000.
  50. Kaseros, V.B., Sleep, B.E., and Bagley, D.M., Column studies of biodegradation of mixtures of tetrachloroethene and carbon tetrachloride, Water Research, 34(17), 4161-4168, 2000.
  51. Sleep, B.E., Sehayek, L., and, Chien, C., Modelling wells in variably saturated soil with wellbore fluid gravity segregation,Adv. Water Resour.,23 (7), 689-697, 2000.
  52. Bagley, D.M., M. Lalonde, V. Kaseros, K.E. Stasiuk and B.E. Sleep.  Anaerobic biodegradation of mixtures of tetrachloroethene, carbon tetrachloride and chloroform, Water Research, 34(1), 171-178, 2000.
  53. Ahad, J. M. E., B. Sherwood Lollar, E. A. Edwards, G. F. Slater, B. E. Sleep, Carbon isotope fractionation during anaerobic biodegradation of toluene: implications for intrinsic bioremediation, Environ. Sci. and Technol., 34(5), 892-896, 2000.
  54. Seheyak, L., T.D. Vandell, B.E. Sleep, M.D. Lee and C. Chien. Investigation and remediation of a 1,2-dichloroethane spill. part I: short and long term remediation strategies, Ground Water Monitoring and Remediation, 19(3), 71-81, 1999.
  55. Lee, M.D., L. Seheyak, B.E. Sleep and  T.D. Vandell. Investigation and remediation of a 1,2-dichloroethane spill. part II:. documentation of natural attenuation. Ground Water Monitoring and Remediation,19(3), 82-88, 1999.
  56. Sherwood-Lollar, B., Slater, G. F., Ahad, J., Sleep, B. E., Spivack, J., Brennan, M., MacKenzie, P., Compound specific carbon isotope analysis – a new approach to evaluating intrinsic bioremediation, Organic Geochemistry, 30(8a), 813-820 1999.
  57. She, H., and B. E. Sleep, Removal of PCE from soil by steam flushing in a two-dimensional laboratory cell, Ground Water Monitoring and Remediation, 19(2), 70-77, 1999.
  58. Sleep, B.E., Modeling transient organic vapor transport in porous media with the dusty gas model, Adv. Water Resour., 22(3), 247-256, 1998.
  59. Isalou, M., B. E. Sleep, and S. N. Liss, Biodegradation of high concentrations of tetrachloroethene in a continuous column system,Environ. Sci. and Technol., 32(22), 3579-3585, 1998.
  60. She, Y., and B. E. Sleep, The effect of temperature on capillary pressure-saturation relationships for air-water and perchloroethylene-water systems, Water Resour. Res., 34(10), 2587-2597, 1998.
  61. Sleep, B. E., and L. J. Mulcahy, Estimation of biokinetic parameters for unsaturated soils, ASCE J. Environ. Eng., 124(10), 959-969, 1998.
  62. Sleep, B. E. and Y. Ma, Thermal variation of organic fluid properties and impact on thermal remediation feasibility, J. Soil Contamination, 6(3), 281-306, 1997.
  63. McClure, P., and B. E. Sleep, Simulation of bioventing for remediation of organics in groundwater, ASCE. J.  Env. Eng., 122(11), 1003-1012, 1996.
  64. She, Y. Y, B. E. Sleep, and D. Mackay, A fugacity model for soil vacuum extraction,   J. Soil Contamination, 4(3), 227-242, 1995.
  65. Sleep, B. E., A method of characteristics model for equation of state compositional simulation of groundwater contamination by organic compounds, J. Contam. Hydrol., 17, 189-212, 1995.
  66. Sleep, B. E., and J. F. Sykes, Compositional simulation of groundwater contamination by organic compounds, 1: Model development and verification.  Water Resour. Res., 29(6), 1697-1708, 1993.
  67. Sleep, B. E., and J. F. Sykes, Compositional simulation of groundwater contamination by organic compounds, 2: Model applications.  Water Resour. Res., 26(9), 1709-1718, 1993.
  68. Sleep, B. E., and J. F. Sykes, Modelling transport of volatile organics in variably saturated media, Water Resour. Res., 25(1), pp. 81-92, 1989.

Book Chapters

 

  • Sleep, B. E., Shackelford, C. D., Parker, J. C., Modeling of Fluid Transport Through Barriers (62 pages) in: Barrier Systems for Environmental Contaminant Containment and Treatment, ed. Chien, C., Inyang, H., and Everett, L., Taylor and Francis, Boca Raton, 2006.
  • Sleep, B.E., with contributions from C.R. Faust, N.D. Durant, J.C. Parker, J.G. Guarnaccia, L. Sehayek, and M.R. Harkness. Modeling Fate and Transport of Chlorinated Organic Compounds in the Subsurface (85 pages).  In: Contaminated Groundwater and Sediments: Modeling for Management and Remediation. CRC Press, 2003.
  • Sleep, B.E., with contributions from C.R. Faust, N.D. Durant, J.C. Parker, J.G. Guarnaccia, L. Sehayek, and M.R. Harkness. 2002. Modeling Fate and Transport of Chlorinated Organic Compounds in the Subsurface.  In: Environmental Modeling and Management: Theory, Practice, and Future Directions. Today Media, Inc., Wilmington, DE. pp. 187-272.