Fractionaton of residual cadmium, copper, nickel, lead, and zinc in previously sludge-amended soil
Journal Article
·
· Communications in Soil Science and Plant Analysis
- Alabama A&M Univ., Normal, AL (United States)
The fractionation of heavy metals in previously sludge-amended soil is important to evaluate their behavior in the environment in terms of mobility and availability to crop plants. A surface soil that received two types of sludges at two different rates, plus fertilizer only and no treatment (control), having been fallow for nine years, was used in this study. The contents of cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn) fractions in previously sludge-amended soils were governed by the total content of these metals in the sludges applied and by the rate of sludge application. The contents of these metals were higher for soils that received the Chicago sludge as compared to that receiving the Huntsville sludge. Furthermore, soils that received 20Mg/ha/yr of sludge for five years generally had higher levels of these metals than those receiving a single dose at the 100 Mg/ha application rate. The percentage of the total content in the water soluble and exchangeable forms was very low ({<=}1%) regardless of sludge application. The application of sludges tended to reduce the residual fraction and to increase the organic and carbonate fractions. Overall, the predominant forms of the metals in the sludges were as the Cd-, Ni-, Pb-, and Zn-carbonate and Cu-organic fractions. 18 refs., 7 tabs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 146515
- Journal Information:
- Communications in Soil Science and Plant Analysis, Journal Name: Communications in Soil Science and Plant Analysis Journal Issue: 13-14 Vol. 26; ISSN CSOSA2; ISSN 0010-3624
- Country of Publication:
- United States
- Language:
- English
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