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EFFECT OF PHOSPHORUS TREATMENT ON LEAD MINERALOGY
Citation:
Scheckel*, K G. AND J. Yang. EFFECT OF PHOSPHORUS TREATMENT ON LEAD MINERALOGY. Presented at Annual Meeting of the American Society of Agronomy, Charlotte, MC, 10/21-25/2001.
Description:
Remediation of Pb-contaminated soils by amendments of phosphate may prove to be a viable way of sequestering Pb in the natural environment. Test plots of Pb-contaminated soil near Joplin, MO were treated with a variety of phosphorus-based amendments to observe the influence of concentration, phosphorus form (triple super phosphate, rock phosphate, phosphoric acid), iron, and/or composted biosolids on conversion of soil-Pb to the lead phosphate mineral, pyromorphite. We conducted X-ray adsorption fine structure (XAFS) and X-ray diffraction (XRD) spectroscopic studies to examine changes in the overall chemical and physical nature of Pb when exposed to these P treatments.