PNG 550
Reactive Transport in the Subsurface

Lesson 3: Surface Complexation



This lesson introduces general principles of surface complexation reactions, as well as how to set up surface complexation models in well-mixed batch reactors in CrunchFlow.

Learning Outcomes

By the end of this lesson, you should be able to:

  • Understand what are surface complexation reactions;
  • Comprehend thermodynamic controls of and important parameters for surface complexation
  • Simulate surface complexation reactions in well-mixed batch reactors in CrunchFlow

Lesson Roadmap

Lesson Roadmap
To Read
  1. Chapter 10 in Aqueous Environmental geochemistry (1997) by Langmuir, D.;
  2. Chapter 7 in Geochemistry, groundwater, and pollution, 2nd edition, by C. A. J. Appelo and D. Postma, 2005;
  3. Page 63-64 and 69 of CrunchFlow manual;
  4. Example 4 of CrunchFlow exercise group.
To Do
  • Online reading materials
  • Light board video
  • Example videos
  • Homework 


If you have any questions, please post them to our Questions? discussion forum (not e-mail), located in Canvas. The TA and I will check that discussion forum daily to respond. While you are there, feel free to post your own responses if you, too, are able to help out a classmate.