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| Ippolito, J.A.; Strawn, D.G.; Scheckel, K.G.. |
| In the western US, sugar beet processing for sugar recovery generates a lime-based waste product (~250,000 megagrams/yr) that has little liming value in the region’s calcareous soils. This area has recently experienced an increase in dairy production, with dairies utilizing copper-based hoof baths to prevent hoof diseases. A concern exists regarding soil copper accumulation as spent hoof baths may be disposed of in waste ponds with pond waters utilized for irrigation. The objective of this preliminary study was to evaluate the ability of lime waste to sorb copper. Lime waste was mixed with increasing copper-containing solutions (up to 100,000 mg/kg), at various buffered pH values (6, 7, 8, 9), and shaken over various time periods (up to 30 days).... |
| Tipo: Article |
Palavras-chave: Sugarbeet; Chemistry; Manure; Soil. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1504/1/1468.pdf |
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| Ippolito, J.A.; Strawn, D.G.; Scheckel, K.G.; Novak M, J; Ahmedna, M.; Niandou, M.A.S.. |
| Excessive copper concentrations in water systems can negatively impact biological systems. Because copper can form strong associations with organic functional groups, we examined the ability of biochar (a carbon-enriched organic bioenergy by-product) to sorb copper from solution. In a batch experiment, potassium hydroxide-steam activated pecan shell biochar was shaken for 24 hours in pH 6, 7, 8, or 9 buffered solutions containing various copper concentrations to identify effect of pH on biochar copper sorption. Afterwards, all biochar solids from the 24 hours shaking period were air-dried and then analyzed using X-ray absorption fine structure spectroscopy to determine solid-phase copper speciation. In a separate batch experiment, biochar was shaken... |
| Tipo: Article |
Palavras-chave: Soil quality. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1521/1/1483.pdf |
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