The temporal and spatial variability of dissolved organic carbon conformation in an acidic groundwater-dependent wetland: the impact of pH, iron, aluminium and hydrology

Azra Munirah Mat Daud

doi:10.4225/23/5a7a8abeb54a6

The temporal and spatial variability of dissolved organic carbon conformation in an acidic groundwater-dependent wetland: the impact of pH, iron, aluminium and hydrology

Azra Munirah Mat Daud

Research output: Thesis › Doctoral Thesis

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Abstract

The relationships between hydrological dynamics. geochemical heterogeneity and dissolved organic carbon (DOC) structural
characteristics were determined in an acidic groundwater dependent wetland. Multiple analytical tools were used to quantify
changing DOC characteristics in both surface water and groundwater, over time. Complexation between pH, Fe, Al and
DOC In the wetland were interrelated and seasonally driven by hydrological connectivity. DOC conformation and reactivity
changed rapidly in response changing hydrological conditions, with implications for the role of DOC in wetland ecology. This
work highlighted the risk associated with relying on synoptic water monitoring with little regard for hydrological connectivity
conditions.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Oldham, Carolyn, Supervisor McDonald, Suzanne, Supervisor, External person
Award date	23 Jan 2018
DOIs	https://doi.org/10.4225/23/5a7a8abeb54a6
Publication status	Unpublished - 2018

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THESIS - DOCTOR OF PHILOSOPHY - MAT DAUD Azra Munirah - 2018
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Cite this

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AB - The relationships between hydrological dynamics. geochemical heterogeneity and dissolved organic carbon (DOC) structuralcharacteristics were determined in an acidic groundwater dependent wetland. Multiple analytical tools were used to quantifychanging DOC characteristics in both surface water and groundwater, over time. Complexation between pH, Fe, Al andDOC In the wetland were interrelated and seasonally driven by hydrological connectivity. DOC conformation and reactivitychanged rapidly in response changing hydrological conditions, with implications for the role of DOC in wetland ecology. Thiswork highlighted the risk associated with relying on synoptic water monitoring with little regard for hydrological connectivityconditions.

KW - groundwater-dependent ecosystem

KW - size exclusion chromatography

KW - hydrological connectivity

KW - molecular weight distribution

KW - rapid fractionation

KW - conformation

KW - molecular structure

KW - principal component analysis

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The temporal and spatial variability of dissolved organic carbon conformation in an acidic groundwater-dependent wetland: the impact of pH, iron, aluminium and hydrology

Abstract

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