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Characterization of inorganic solid phases in density-fractionated sewage sludge and sewage sludge-amended soil

Thesis/Dissertation ·
OSTI ID:6070626
The objectives of this work were: to chemically characterize samples of the Los Angeles sewage sludge, the Domino soil which had been continuously amended with this sludge over a 7-year period (90 Mg.ha/sup -1/.yr/sup -1/) and the unamended Domino soil using neutron activation, inductively coupled argon plasma, and atomic absorption spectroscopy analyses; to physicochemically fractionate sewage sludge and amended soil samples into particle size, density, and magnetic susceptibility fractions so as to concentrate trace metallic element-bearing solids into a few subsamples; and to characterize the sewage sludge and amended soil separates for the characterization and identification of trace metallic element bearing solids. Multi-elemental chemical analyses resulted in elemental concentration data for 35 elements. The Los Angeles sewage sludge was found to contain 7 of these in concentrations exceeding their previously reported sewage sludge concentration ranges. Sludge-amended Domino soil was found to have elevated concentrations of 13 elements in the zone of sludge incorporation. However, only Ce, La, Nd, and Sb were found to accumulate in the Domino soil to concentrations that greatly exceeded their concentration ranges in uncontaminated soils.
Research Organization:
California Univ., Riverside (USA)
OSTI ID:
6070626
Country of Publication:
United States
Language:
English