1. Doethur mewn Athroniaeth
2. The Response of Extracellular Phenol Oxidase Activity to Environmental Change, and the Implications for the Stability of Soil Carbon Stores

   Awdur: Toberman, H., Hyd 2007

   Goruchwylydd: Freeman, C. (Goruchwylydd), Evans, C. (Goruchwylydd) & Fenner, N. (Goruchwylydd)

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. The characterisation of dissolved organic carbon and its influence on tri-halomethane formation potential

   Awdur: Hughes, D., 1 Mai 2013

   Goruchwylydd: Freeman, C. (Goruchwylydd) & Holliman, P. (Goruchwylydd)

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

4. The effect of peatland rewetting on gaseous and fluvial carbon losses from a Welsh blanket bog

   Awdur: Peacock, M., 1 Awst 2013

   Goruchwylydd: Freeman, C. (Goruchwylydd)

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. The effects of a changing climate on the biogeochemistry of peat accumulating wetlands

   Awdur: Ellis, T., Gorff 2008

   Goruchwylydd: Freeman, C. (Goruchwylydd)

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

6. The effects of climate change on dissolved organic carbon release from peatlands

   Awdur: Fenner, N., Ion 2002

   Goruchwylydd: Freeman, C. (Goruchwylydd)

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

7. The effects of water table drawdown and catchment management on DOC export and water quality

   Awdur: Willis, N., Ion 2009

   Goruchwylydd: Freeman, C. (Goruchwylydd)

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

8. The impacts of elavated ozone on plant vitality and carbon cycling in wetlands

   Awdur: Williamson, J. L., Awst 2009

   Goruchwylydd: Mills, G. (Unigolyn allanol) (Goruchwylydd) & Freeman, C. (Goruchwylydd)

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

9. The removal of linear alkylbenzene sulphonate (LAS) in constructed wetlands

   Awdur: Thomas, R., Maw 2003

   Goruchwylydd: Freeman, C. (Goruchwylydd)

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

10. The significance of enzymes in the biogeochemical functioning of constructed wetlands

    Awdur: Shackle, V. J., Meh 2000

    Goruchwylydd: Freeman, C. (Goruchwylydd)

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

11. Trihalomethane Formation in Drinking Water; Impact of Drought, Treatment Wetlands and Methods of Analysis

    Awdur: Ehbair, A., Ion 2017

    Goruchwylydd: Freeman, C. (Goruchwylydd) & Murphy, L. (Goruchwylydd)

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth