News & Events
Department Events

Events

  • Jan
    29

    EES Seminar: Tiezheng Tong

    McCormick - Civil and Environmental Engineering

    2:00 PM

    EVENT DETAILS

    Membrane distillation for hypersaline brine management: Material innovation, resilience, and energy consumption

    Membrane distillation (MD), a hybrid thermal-membrane desalination technology, has recently received tremendous interest as a sustainable technology for the treatment of hypersaline brines. MD is tolerant to higher salinity (than reverse osmosis) and capable of leveraging low-grade thermal energy such as waste heat and geothermal energy. However, several fundamental aspects need to be addressed for industrial adoption of MD. In this seminar, I will present and discuss such aspects from the perspectives of material innovation, resilience, and energy consumption. First, MD performance is constrained by membrane wetting caused by low surface tension contaminants. Accordingly, omniphobic membranes with high wetting resistance have been used to improve the resilience of MD. Recently, we discovered a trade-off between membrane wetting resistance and water vapor permeability in MD. Such a trade-off, pertaining to the water-air interfacial area, needs to be considered in the design framework of high-performance MD membranes. Second, MD is susceptible to mineral scaling because scalants are accumulated in hypersaline brines. I will elucidate the different mechanisms, behaviors, and mitigation strategies of gypsum and silica scaling, two of the most common scaling in membrane desalination, highlighting the importance of understanding mineral scaling at the molecular level. Third, the economic viability of MD is determined by the availability of low-grade thermal energy, which has not been fully understood in the literature. I will describe our investigation on the feasibility of using waste heat to power MD for on-site and centralized treatment of oil and gas produced water. At the conclusion of the seminar, I will discuss the prospects and research needs associated with MD to improve environmental sustainability at the water-energy nexus.

    Bio: Dr. Tiezheng Tong is currently an assistant professor Department of Civil and Environmental Engineering at Colorado State University. He received his Ph.D. degree in Civil and Environmental Engineering from Northwestern University in 2015, and then worked as a Postdoctoral Research Fellow at Yale University. Dr. Tong holds a B.S. degree (2008) with honors in Environmental Engineering from Beijing Normal University, a M.S. degree (2010) in Environmental Science and Engineering from Tsinghua University, and a second M.S. degree (2011) in Civil and Environmental Engineering from Northwestern University. He is the leading author or co-author of ~50 peer-reviewed journal articles with citation of ~1,800 globally. He is the recipient of several academic and professional awards, including the Young Membrane Scientist Award of North American Membrane Society (2020) and Environmental Chemistry Graduate Student Award from American Chemistry Society (2012). Dr. Tong and his group applies interdisciplinary approach to improve sustainability at the water-energy-health nexus. His research interests include (i) design and development of novel membrane materials and processes for sustainable water supply; (ii) environmental applications and implications of nanotechnology; and (iii) resource recovery from wastewater treatment processes.

    more less

    TIME Friday, January 29, 2021 at 2:00 PM - 3:00 PM

    ADD TO CALENDAR SHARE

    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    3

    SPREE Seminar: Joe Labuz

    McCormick - Civil and Environmental Engineering

    11:00 AM

    EVENT DETAILS

    TIME Wednesday, March 3, 2021 at 11:00 AM - 12:00 PM

    ADD TO CALENDAR SHARE

    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    4

    TAM Seminar: Prof. Wendy C. Crone

    McCormick - Civil and Environmental Engineering

    10:00 AM

    EVENT DETAILSmore info

    TIME Thursday, March 4, 2021 at 10:00 AM - 11:00 AM

    ADD TO CALENDAR SHARE

    CONTACT Alison Rodriguez    alison.rodriguez@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    5

    EES Seminar: Kevin Wilkinson

    McCormick - Civil and Environmental Engineering

    2:00 PM

    EVENT DETAILS

    TIME Friday, March 5, 2021 at 2:00 PM - 3:00 PM

    ADD TO CALENDAR SHARE

    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    10

    SPREE Seminar: John van de Lindt

    McCormick - Civil and Environmental Engineering

    11:00 AM

    EVENT DETAILS

    TIME Wednesday, March 10, 2021 at 11:00 AM - 12:00 PM

    ADD TO CALENDAR SHARE

    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    11

    Electronically Integrated Microscopic Robots

    McCormick - Civil and Environmental Engineering

    10:00 AM

    EVENT DETAILSmore info

    TIME Thursday, March 11, 2021 at 10:00 AM - 11:00 AM

    ADD TO CALENDAR SHARE

    CONTACT Alison Rodriguez    alison.rodriguez@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    12

    EES Seminar: Noah Fierer

    McCormick - Civil and Environmental Engineering

    2:00 PM

    EVENT DETAILS

    TIME Friday, March 12, 2021 at 2:00 PM - 3:00 PM

    ADD TO CALENDAR SHARE

    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    13

    Winter Classes End

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Saturday, March 13, 2021

    ADD TO CALENDAR SHARE

    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar

  • Mar
    15

    Winter Examinations Begin

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Monday, March 15, 2021

    ADD TO CALENDAR SHARE

    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar

  • Mar
    20

    Spring Break Begins

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Saturday, March 20, 2021

    ADD TO CALENDAR SHARE

    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar

  • Mar
    26

    Winter Degrees Conferred

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Friday, March 26, 2021

    ADD TO CALENDAR SHARE

    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar

  • Mar
    29

    Spring Break Ends

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Monday, March 29, 2021

    ADD TO CALENDAR SHARE

    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar

  • Mar
    30

    Spring Classes Begin 8 a.m. Classes remote until Tuesday, April 6.

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Tuesday, March 30, 2021

    ADD TO CALENDAR SHARE

    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar