Effects of Photoirradiation on the Adsorption of Dissolved Organic Matter to Goethite

Thesis or Dissertation


Previous research has shown that intermediate and high molecular weight components of dissolved organic matter (DOM), as well as components rich in aromatic moieties, are preferentially adsorbed to mineral surfaces. It has also been shown that photoirradiation degrades DOM, decreasing the overall amount of dissolved organic carbon (DOC) in solution, as well as decreasing the average molecular weight and UV light absorbing properties of DOM molecules in solution. Our results show that the decrease in molecular weight and UV light absorbance of adsorbed irradiated DOM, as well as the percent adsorption of irradiated DOM was greater than from either irradiation or adsorption alone. The coupled decrease in UV light absorbance upon irradiation and adsorption may have dilatory environmental ramifications if water which was exposed to sunlight interacts with mineral surfaces and is then flushed into streams or lakes. This would result in a larger amount of UV light penetrating through the water column, possibly threatening the health of sensitive organisms and ecosystems.


Attribute NameValues
  • etd-07022003-175209

Author Christina Ann Progess
Advisor Patricia A. Maurice
Contributor Peter C. Burns, Committee Member
Contributor Jeremy B. Fein, Committee Member
Contributor Patricia A. Maurice, Committee Chair
Degree Level 1
Degree Discipline Civil Engineering and Geological Sciences
Degree Name Master of Science
Defense Date
  • 2003-06-18

Submission Date 2003-07-02
  • United States of America

  • iron

  • molar absorptivity at 280 nm

  • UV

  • absorbance


  • molecular weight

  • photodegradation

  • low molecular weight acids

  • photobleaching

  • spectral slope

  • e280

  • University of Notre Dame

  • English

Access Rights Open Access
Content License
  • All rights reserved