Soil freezing effects on upland stream solute chemistry

Edwards, Anthony C.; Creasey, John; Cresser, Malcolm S.

doi:10.1016/0043-1354(86)90169-7

Cited by 39 publications

(17 citation statements)

References 16 publications

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“…Determination of Ca, Na, Mg, K, Mn, Zn, Fe, A1, Si, P and S was performed using a 26 channel ARL 3580 inductively coupled plasma-atomic emission spectrometer. Estimation of the amount of total organic soluble carbon (TOC) retained by the fibres, after passage of the river water, was provided by measuring UV absorbance at 250nm (Edwards and Cresser, 1986). All later determinations of TOC were made using an automated Phase Separations TOCSIN II total organic carbon analyzer.…”

Section: Chemical Analysismentioning

confidence: 99%

Evaluation of polysulfone hollow fibres and ceramic suction samplers as devices for the in situ extraction of soil solution

Jones

Edwards

1993

Plant Soil

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An investigation was carried out to assess the potential of using polysulfone hollow fibres for the extraction of soil solution. In comparison to ceramic suction samplers the fibres were shown to contain very low levels of potential contaminants and a low exchange capacity. Carry over between individual samples was negligible permitting the accurate monitoring of temporal changes in solution chemistry. Their flexible and root sized nature makes them ideal for sampling small soil volumes. Some concern however remains about retention of colloidal Fe at the fibre interface. When comparing the soil solution of samples extracted with polysulfone fibres with those extracted by ceramic suction samplers, no significant differences in solute concentrations were observed. No sample contamination resulting from dissolution of AI or Si from the ceramic cup was detected. Analysis of soil solutions collected over a number of extractions, and during and after a rainfall event showed concentrations of elements in solution to remain relatively constant with time.

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Section: Chemical Analysismentioning

confidence: 99%

Evaluation of polysulfone hollow fibres and ceramic suction samplers as devices for the in situ extraction of soil solution

Jones

Edwards

1993

Plant Soil

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“…Increases in H+ and A1 concentrations in acid-sensitive lakes and streams often are associated with periods of high flow and shifts in hydrologic flow paths to upper, organic soil horizons where Al-organic matter complexes (Al-OM) are important (Lawrence et al 1986;Hendershot et al 1986;Hooper & Shoemaker 1985;Schofield et al 1985;Edwards et al 1986;Driscoll et al 1985). In peatlands, water flows continuously through similar organic horizons, and the low pH and high DCC concentrations in peatland waters enhance the mobility of Al.…”

Section: Introductionmentioning

confidence: 99%

Aluminum geochemistry in peatland waters

1990

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Abstract. The chemical speciation of aluminum was examined in surface water samples from Sphagnum peatlands in north-central Minnesota, from peatlands along the Canadian east coast, and from bogs in the Pennine Mountain area of England. In highly organic ([DOC] x 50 mg L-'), low pH waters, 80-90% of total dissolved Al was complexed with organic matter (OM), while in waters with low DOC ([DOC] x 5 mg L-') 5446% of total dissolved A1 existed as Al+' or other inorganic Al species. Batch titrations of OM with Al revealed a high Al binding capacity, 1.4-2.8 pmol (mg DOC)-', that generally was unsaturated with Al. Titrations of OM with A1 in conjunction with a continuous distribution model were used to determine Al-OM conditional stability constants. Binding capacity (pmol A1 (mg DOC)-') and strength (formation constant) increased from pH 3 to 5 but decreased above pH 5 due to formation of Al-hydroxy species including AI(OH),(s). The high binding capacity of OM in bog waters facilitates metal mobility, especially in low pH (< 5) wetlands where metal solubility is high and OM concentrations are highest. Results showed that the relative degree of organic matter saturation with metal ions was important in modeling A1 speciation in bog waters.

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“…Johannessen & Henriksen, 1978 ;Johannessen et al, 1980 ;Galloway et al,, 1987) . The flushing of soil solution into the surface water at the beginning of the melt can, depending on the type and depth of soil in the watershed, serve as another source of nitrate (Stottlemyer & Toczydlowski, 1990;Stottlemyer & Troendle, 1992), and as an important source of total organic carbon (Edwards et al, 1986 ;Denning et al, 1991) . Overland flow represents another important source of organic carbon and total nitrogen and phosphorus during snowmelt (Stottlemyer & Toczydlowski, 1991) .…”

Section: Introductionmentioning

confidence: 99%

Concentration of nutrients in selected lakes in the High Tatra Mountains, Slovakia: effect of season and watershed

et al. 1996

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Concentrations of total phosphorus (TP), inorganic and organic nitrogen, organic matter, and chlorophyll-a were studied in ten mountain lakes at various stages of acidification, trophy, and type of watershed during each July and October from 1987 to 1990. Concentrations of TP and total organic matter were higher in July than in October . Concentrations of NH4 -N decreased and NO 3 --N increased from July to October . The relative composition of total nitrogen (TN) and its concentration were strongly dependent on the type of watershed : the lowest TN concentrations were observed in lakes with forested watersheds, increasing above the timberline and reaching maximum values in acidified lakes with rocky watersheds . In the pool of TN, nitrate was most important in lakes above the timberline (70-86% of TN), and organic nitrogen in forest lakes (> 90% of TN) . Lakes with rocky watersheds were characterized by high ratios of TN :TP (> 250 by mass) . The concentration of chlorophyll-a varied widely, from 0 .01 to 22 .6 µg 1 -1 , without any consistent change between July and October, and were P limited .

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Soil freezing effects on upland stream solute chemistry

Cited by 39 publications

References 16 publications

Evaluation of polysulfone hollow fibres and ceramic suction samplers as devices for the in situ extraction of soil solution

Evaluation of polysulfone hollow fibres and ceramic suction samplers as devices for the in situ extraction of soil solution

Aluminum geochemistry in peatland waters

Concentration of nutrients in selected lakes in the High Tatra Mountains, Slovakia: effect of season and watershed

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