Origin and migration of dissolved organic carbon fractions in a clay-rich aquitard: 14C and delta13C evidence

• Published in: Water resources research Vol. 41; no. 2
• Main Authors: Hendry, M.J, Wassenaar, L.I
• Format: Journal Article
• Language: English
• Published: 2005
• Subjects: clay; dissolved organic carbon; equations; geochemistry; radiolabeling; radionuclides; saturated conditions; soil pore water; soil respiration; soil transport processes; Canada

The origin and long-term transport of dissolved organic carbon (DOC) and its high molecular weight (HMW) and low molecular weight (LMW) fractions were investigated in a clay-rich till aquitard system. DOC concentrations decreased systematically with depth from 168 mg L(-1) in the surficial fractured...