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Fractionation of copper, nickel, and zinc in metal-spiked sewage sludge
(American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, 2001)
The enrichment or spiking of sewage sludge with heavy metals for experimental purposes is a fairly widely used, although sometimes controversial, technique. A study was undertaken, using a sequential fractionation scheme, ...