Sources and Age of Aquatic Humus

1998 ◽  
pp. 9-39 ◽  
Author(s):  
Diane M. McKnight ◽  
George R. Aiken
Keyword(s):  
Aquatic Humus

Water Treatment Considerations–Aquatic Humus

1983 ◽  
Vol 15 (S2) ◽  
pp. 95-101 ◽  
Author(s):  
E T Gjessing
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Humic Substances ◽  
Health Effects ◽  
Surface Waters ◽  
Cold Climate ◽  
Treatment Processes ◽  
Aquatic Humus ◽  
Treatment Considerations

For several reasons the surface waters in cold climate areas are coloured due to humic substances. There are two major objections against humus in drinking water, the first is concerned with aesthetical and practical problems and the second is due to indirect negative health effects. There are essentially three different methods in use today for the removal or reduction of humus colour in water: (1) Addition of chemicals with the intention of reducing the “solubility”, (2) Addition of chemicals in order to bleach or mineralize the humus, and (3) Filtration with the intention of removal of coloured particles and some of the “soluble” colour. The treatment processes are discussed.

Influence of Vegetation and Hydrology on the Humus Budgets of Labrador Lakes

1987 ◽  
Vol 44 (7) ◽  
pp. 1306-1314 ◽  
Author(s):  
Daniel R. Engstrom
Keyword(s):  
Surface Waters ◽  
Water Residence Time ◽  
Water Color ◽  
Direct Precipitation ◽  
Internal Loss ◽  
Model Predictions ◽  
Aquatic Humus ◽  
Major Trend ◽  
Basin Hydrology ◽  
Mass Balance Approach

A mass-balance approach is used to explore the effect of several hydrologic and geographic variables on humic matter concentrations in surface waters of Labrador–Ungava. Water-color measurements from 67 dilute oligotrophic lakes are used to evaluate model predictions of aquatic humus concentration from basin hydrology, catchment vegetation, and internal loss rates. The major trend in water color in the Labrador region — increasing north to south — results from differences in external humus loading from catchment vegetation and soils. Hydrologic influences on aquatic humus concentrations reside in the dilution of catchment drainage by direct precipitation to the lake — effective only when catchments are small — and in water residence time which controls losses due to mineralization and sedimentation.

Measurement of aquatic humus content by spectroscopic analyses

2000 ◽  
Vol 34 (1) ◽  
pp. 246-258 ◽  
Author(s):  
Kimmo Hautala ◽  
Juhani Peuravuori ◽  
Kalevi Pihlaja
Keyword(s):  
Humus Content ◽  
Spectroscopic Analyses ◽  
Aquatic Humus

Effect of aquatic humus on uptake of zinc and barium to alga Selenastrum capricornutum

1989 ◽  
Vol 81-82 ◽  
pp. 703-710
Author(s):  
J. Sedláček ◽  
E. Gjessing ◽  
T. Källqvist
Keyword(s):  
Selenastrum Capricornutum ◽  
Aquatic Humus
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