Characterization of silica and dissolved organic matter aggregation in SAGD produced water

• Author / Creator

  Fatema,Jannat

• Proper understanding of SAGD produced water and boiler blow down (BBD)
  water in particular is required to propose effective treatment processes for
  reuse and reduction in the quantity of disposable water. BBD contains high
  dissolved organic matter (DOM) and total dissolved solid (TDS). This study
  investigates the interaction of silica and DOM in BBD using different analytical techniques. The roles of different types of organics, salts, and colloids
  on silica-DOM co-precipitation were studied at different concentrations and
  pH. In order to study the effects of all factors at three levels and to deter-
  mine the most influential parameters with a minimum number of experiments
  Taguchi orthogonal array was employed. Analysis of variance (ANOVA) was
  performed to evaluate the contribution of each parameter. In the presence
  of salt, the rate of silica organic co-precipitation varies with the nature of
  organics. Humic-like fractions of DOM plays a major role in the process of
  DOM-silica co-precipitation. Light scattering technique applied to examine
  the aggregation rate at low concentrations of organics and DOM also demonstrates that the presence of organics enhances silica aggregation rate.

• Subjects / Keywords

  • SAGD produced water
  • DLS
  • Taguchi
  • Humic acids
  • ANOVA

• Graduation date

  Spring 2014

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3599Z930

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.