News archive - January 2022

Tuesday, January 25, 2022

Press release highlights new economic valuation of wetlands in southern Ontario

A new paper by Tariq Aziz and Philippe Van Cappellen uses economic valuation to highlight the importance of Southern Ontario’s wetlands for sediment and phosphorus filtration. A total annual value of $4.2 billion in sediment and phosphorus filtration services was found based on the average rate of sediment accretion plus the associated total phosphorus concentration in each type of wetland in Southern Ontario and estimating how much the removal and disposal of the same amounts of sediment and phosphorus in stormwater management facilities in Ontario would cost.

Saturday, January 22, 2022

New paper explores the roles of pH and dissolved silicate on the adsorption and desorption of phosphate in the presence of ferric iron oxyhydroxides

Phosphorus (P), in the form of aqueous phosphate, is an essential nutrient for the growth of plants and algae. Because it often limits or colimits primary production in freshwater and nearshore marine systems, phosphate enrichment can result in eutrophication and algal blooms. A major process driving phosphate enrichment is the desorption of phosphate from mineral surfaces, in particular those of ferric iron oxyhydroxides.

Thursday, January 20, 2022

New paper on modeling microbially-mediated degradation of organic matter in subsurface environments

Check out the new publication by former ERG researchers Bijen Bajracharya, Christina Smeaton, Igor Markelov, and Ekatarina Markelova, together with Philippe Van Cappellen. The paper presents a novel a bioenergetics-informed kinetic model for the anaerobic degradation of macromolecular organic matter that accounts for extracellular hydrolysis, fermentation, and respiration. The model dynamically calculates the catabolic energy generated by fermentation and respiration.

Thursday, January 13, 2022

Philippe presents at the 2021-2022 OCGC-Logan Club Seminar Series

Philippe presented recent collaborative research on riverine nutrient fluxes and their impacts as part of the 2021-2022 OCGC-Logan Club Seminar Series. The seminar series is jointly offered by the University of Ottawa, Carleton University, and the Geological Survey of Canada's Logan Club in Ottawa. Due to the pandemic, the seminar was delivered virtually

  1. 2022 (15)
    1. May (3)
    2. April (3)
    3. March (1)
    4. February (4)
    5. January (4)
  2. 2021 (45)
    1. December (4)
    2. November (7)
    3. October (6)
    4. September (4)
    5. August (2)
    6. July (3)
    7. June (6)
    8. May (4)
    9. April (2)
    10. March (2)
    11. February (1)
    12. January (4)
  3. 2020 (40)
    1. December (6)
    2. November (3)
    3. October (6)
    4. September (4)
    5. August (3)
    6. July (2)
    7. June (3)
    8. May (3)
    9. April (2)
    10. March (2)
    11. February (3)
    12. January (3)
  4. 2019 (58)
  5. 2018 (71)
  6. 2017 (46)
  7. 2016 (39)
  8. 2015 (42)
  9. 2014 (31)
  10. 2013 (32)
  11. 2012 (8)