Fractionation of aquatic natural organic matter upon sorption to goethite and kaolinite

Meier, Monique; Namjesnik-Dejanović, Ksenija; Maurice, Patricia A.; Chin, Yu‐Ping; Aiken, George R.

doi:10.1016/s0009-2541(99)00006-6

Cited by 203 publications

(159 citation statements)

References 28 publications

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“…In addition, the exponentially decreasing shape may reflect the fractionation of DOM due to biodegradation and sorption. Previous studies (Meier et al 1999;Guo and Chrover 2003) have shown that sorption of DOM to mineral surfaces can result in the removal of the more aromatic and hydrophobic molecules that contribute to CDOM. These processes were invoked in the Bregional chromatographic model^proposed by Shen et al (2015) to explain observed differences between the DOC composition of surface waters recharging the SC Piedmont aquifer, and the DOC composition of the underlying groundwater.…”

Section: Doc Concentrations and Uv Absorbance In Groundwatermentioning

confidence: 99%

The removal kinetics of dissolved organic matter and the optical clarity of groundwater

et al. 2016

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Concentrations of dissolved organic matter (DOM) and ultraviolet/visible light absorbance decrease systematically as groundwater moves through the unsaturated zones overlying aquifers and along flowpaths within aquifers. These changes occur over distances of tens of meters (m) implying rapid removal kinetics of the chromophoric DOM that imparts color to groundwater. A one-compartment input-output model was used to derive a differential equation describing the removal of DOM from the dissolved phase due to the combined effects of biodegradation and sorption. The general solution to the equation was parameterized using a 2-year record of dissolved organic carbon (DOC) concentration changes in groundwater at a longterm observation well. Estimated rates of DOC loss were rapid and ranged from 0.093 to 0.21 micromoles per liter per day (μM d ) observed in groundwater produced from 59 wells tapping eight different aquifer systems of the United States. The nearly uniform optical clarity of groundwater, therefore, results from similarly rapid DOM-removal kinetics exhibited by geologically and hydrologically dissimilar aquifers.

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Section: Doc Concentrations and Uv Absorbance In Groundwatermentioning

confidence: 99%

The removal kinetics of dissolved organic matter and the optical clarity of groundwater

et al. 2016

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“…Selective sorption at mineral surfaces further contributes to changes in DOC chemical properties and bioavailability (McDowell, 1985;Fiebig and Marxsen, 1992;McKnight et al, 1992). For example, highmolecular weight DOC such as humic and fulvic acids shows high affinity to metal oxides and clays (e.g., McKnight et al, 1992;Meier et al, 1999;Specht et al, 2000;Kaiser et al, 2002). Thus, fluxes of DOC in a catchment are controlled by a combination of biological, chemical and physical processes (Battin et al, 2008), generating considerable potential for DOC to be modified during transport from upland soils to streams and lakes.…”

Section: U Risse-buhl Et Al: Dynamics Chemical Properties and Bioamentioning

confidence: 99%

Dynamics, chemical properties and bioavailability of DOC in an early successional catchment

Risse‐Buhl

Hagedorn

Dümig³

et al. 2013

Biogeosciences

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Abstract. The dynamics of dissolved organic carbon (DOC) have been intensively studied in mature ecosystems, but little is known about DOC dynamics and the significance of DOC as a substrate for microbial activity in early-successional catchments. We determined the concentration, chemical composition, source, radiocarbon age, and bioavailability of DOC along the hydrological flow path from soil solution to a downstream pond in a recently constructed catchment (Chicken Creek Catchment, Germany). Soil solution, upwelling ground water, stream water, subsurface water in an alluvial fan, and pond water all had high DOC concentrations (averages: 6.0–11.6 mg DOC L–1), despite small carbon stocks in both vegetation and soil of the catchment. Solid-state CPMAS 13C NMR of DOC in upwelling ground water revealed a higher proportion of aromatic compounds (32%) and a lower proportion of carbohydrates (33%) than in pond water (18% and 45%, respectively). The average 14C age of DOC in upwelling ground water was 2600 to 2900 yr, while organic matter of the Quaternary substrate of the catchment had a 14C age of 3000 to 16 000 yr. Both the 14C age data and 13C NMR spectra suggest that DOC partly derived from organic matter of the Quaternary substrate (about 40 to 90% of the C in the DOC), indicating that both recent and old C of the DOC can support microbial activity during early ecosystem succession. However, in a 70 day incubation experiment, only about 11% of the total DOC was found to be bioavailable. This proportion was irrespective of the water type. Origin of the microbial communities within the catchment (enriched from soil, stream sediment or pond water) also had only a marginal effect on overall DOC utilization.

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“…The concentration of dissolved OM also determines the mechanism by which OM-mineral phases form (Feng et al 2005;Reiller et al 2006). Mineral charge, surface area, and morphology will determine points of contact for OM and promote varying modes of OM sorption (Hur and Schlautman 2003;Meier et al 1999;Feng et al 2005;Kleber et al 2007). For example, dissolved OM sorption by iron and aluminum oxides is believed to occur via ligand exchange, whereas cation bridges are believed to dominate in OM sorption to aluminosilicates (Chorover and Amistadi 2001;Zhou et al 1994).…”

Section: Organic Matter-mineral Interactionsmentioning

confidence: 99%

The Role of Organic Matter–Mineral Interactions in the Sorption of Organic Contaminants

Simpson

2011

Biophysico‐Chemical Processes of Anthropogenic Organic Compounds in Environmental Systems

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Fractionation of aquatic natural organic matter upon sorption to goethite and kaolinite

Cited by 203 publications

References 28 publications

The removal kinetics of dissolved organic matter and the optical clarity of groundwater

The removal kinetics of dissolved organic matter and the optical clarity of groundwater

Dynamics, chemical properties and bioavailability of DOC in an early successional catchment

The Role of Organic Matter–Mineral Interactions in the Sorption of Organic Contaminants

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