Soil solution chemistry of sewage-sludge incinerator ash and phosphate fertilizer amended soil
- Univ. of Minnesota, St. Paul, MN (United States)
The chemical composition of the soil provides useful information on the feasibility of amending agricultural land with municipal and industrial waste, because the soil solution is the medium for most soil chemical reactions, the mobile phase in soils, and the medium for mineral adsorption by plant roots. The soil solutions studies in this research were from plots in a 4-yr field experiment conducted to evaluate the effects of the trace metals and P in sewage-sludge incinerator ash. Treatments compared ash with equivalent P rates from triple-superphosphate fertilizer and a control receiving no P application. Ash and phosphate fertilizer were applied annually at rates of 35, 70, and 140 kg citrate-soluble P ha{sup -1}. Cumulative ash applications during 4 yr amounted to 3.6, 7.2, and 14.4 Mg ash ha{sup -1}. Soil solutions were obtained by centrifugation-immiscible liquid displacement using a fluorocarbon displacing agent. Following chemical analysis, a chemical speciation model was used to determine possible solubility-controlling minerals for trace metals and P, and correlations between solution composition and plant uptake were analyzed. 37 refs., 5 tabs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 258795
- Journal Information:
- Journal of Environmental Quality, Vol. 24, Issue 2; Other Information: PBD: Mar-Apr 1995
- Country of Publication:
- United States
- Language:
- English
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