Partial least-squares near-infrared determination of hydrocarbons removed from polluted waters by using tanned solid wastes
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A new procedure has been developed for the determination of hydrocarbons retained in solid tanned wastes from polluted waters. The method uses near-infrared (NIR) transmission spectra obtained from leachates of the hydrocarbons with CCl4 using a partial least-squares (PLS) calibration model based on the use of mixtures of n-hexane, isooctane, and toluene diluted with CCl4. This methodology was applied to the evaluation of the absorption capacity of chrome shavings in water samples polluted with hydrocarbons, resulting in a maximum absorption capacity of 6.30 g hydrocarbons per g solid waste.
KeywordsHydrocarbons Isooctane Toluene n-Hexane Tannery solid wastes NIR determination PLS
Authors acknowledge the financial support of AECI (Agencia Española de Cooperación Internacional), Project 128/04/R/M.
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