Extractability of copper, zinc, cadmium, and lead in soils incubated with sewage sludge

Journal Article · Sat Jan 01 04:00:00 EST 1977 · J. Environ. Qual.; (United States)

DOI:https://doi.org/10.2134/jeq1977.00472425000600010012x· OSTI ID:5238551

Silviera, D J; Sommers, L E

Soils amended with sewage sludge were incubated in the laboratory and analyzed periodically by a sequential fractionation procedure for the amounts of Cu, Zn, Cd, and Pb that were H/sub 2/O-soluble, KNO/sub 3/-exchangeable, and DTPA- and HNO/sub 3/-extractable. The H/sub 2/O-soluble and exchangeable metals comprised a small percentage of the total metal concentration in the sludge and in the soil-sludge mixtures incubated for 7 to 28 days. The proportion of total Cu, Zn, and Cd extracted by DTPA increased with time while this fraction remained constant with time for Pb. The relative amount of metals extracted by HNO/sub 3/ and DTPA was inversely related. The data indicated that the forms of some metals in soils amended with sludge change with time, suggesting changes in the availability of metals to plants.

• Research Organization: Purdue Univ., W. Lafayette, IN
• OSTI ID: 5238551
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 6:1; ISSN JEVQA
• Country of Publication: United States
• Language: English

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