Metal leaching following sludge application to a deciduous forest soil
| Autor: | M. Roy, D. Couillard |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Yellow birch
Environmental Engineering biology Chemistry Ecological Modeling Environmental engineering biology.organism_classification Pollution Soil contamination Dry weight Soil pH Lysimeter Environmental chemistry Soil water Sewage sludge treatment Waste Management and Disposal Sludge Water Science and Technology Civil and Structural Engineering |
| Zdroj: | Water Research. 32:1642-1652 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/s0043-1354(97)00375-8 |
| Popis: | Dried urban sewage sludge residues were applied to a sugar maple ( Acer saccharum Marsh.) and yellow birch ( Betula alleghaniensis Britton) forest in Quebec at doses of 0, 200, 400 and 800 kg of available nitrogen per hectare (0, 23.1, 46.3 and 92.6 dry weight tonnes ha −1 ), applied in spring 1993, and doses of 200 and 400 kg available nitrogen per hectare (19.3 and 38.6 dry weight tonnes ha −1 ) applied in autumn 1993. The lowest dose added the following amounts of metal to the forest soil (kg ha −1 ): Al, 243; Fe, 682; Mn, 4.6; Cd, 0.16; Cu, 5.2; Pb, 3.0; and Zn, 15. Metal concentrations were measured in soil solution at a 30 cm depth, during the 1993 and 1994 growing seasons. Concentrations of Al, Fe, Mn and Zn reached 8, 0.1, 1, and 0.2 mg l −1 , respectively, for plots receiving the lowest level of sludge treatment; these concentrations exceeded water quality criteria for the protection of aquatic life in the case of Al and Zn. Cd was only detectable for treatments of 400 kg available N ha −1 and greater, where it achieved concentrations of 18 μ g l −1 . Cu and Pb concentrations were less than the limits of detection. This lysimeter study indicates that there is a potential of metal leaching when sewage sludge is applied at doses equal to or greater than 200 kg available N ha −1 to soils with pH |
| Databáze: | OpenAIRE |
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