Micro-X-Ray Fluorescence, Micro-X-Ray Absorption Spectroscopy, and Micro-X-Ray Diffraction Investigation of Lead Speciation after the Addition of Different Phosphorus Amendments to a Smelter-Contaminated Soil

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dc.contributor.author Baker, Lucas R.
dc.contributor.author Pierzynski, Gary M.
dc.contributor.author Hettiarachchi, Ganga M.
dc.contributor.author Scheckel, Kirk G.
dc.contributor.author Newville, Matthew
dc.date.accessioned 2014-12-03T16:30:49Z
dc.date.available 2014-12-03T16:30:49Z
dc.date.issued 2014-12-03
dc.identifier.uri http://hdl.handle.net/2097/18775
dc.description.abstract The stabilization of Pb on additions of P to contaminated soils and mine spoil materials has been well documented. It is clear from the literature that different P sources result in different efficacies of Pb stabilization in the same contaminated material. We hypothesized that the differences in the efficacy of Pb stabilization in contaminated soils on fluid or granular P amendment addition is due to different P reaction processes in and around fertilizer granules and fluid droplets. We used a combination of several synchrotron-based techniques (i.e., spatially resolved micro-X-ray fluorescence, micro-X-ray absorption near-edge structure spectroscopy, and micro-X-ray diffraction) to speciate Pb at two incubation times in a smelter-contaminated soil on addition of several fluid and granular P amendments. The results indicated that the Pb phosphate mineral plumbogummite was an intermediate phase of pyromorphite formation. Additionally, all fluid and granular P sources were able to induce Pb phosphate formation, but fluid phosphoric acid (PA) was the most effective with time and distance from the treatment. Granular phosphate rock and triple super phosphate (TSP) amendments reacted to generate Pb phosphate minerals, with TSP being more effective at greater distances from the point of application. As a result, PA and TSP were the most effective P amendments at inducing Pb phosphate formation, but caution needs to be exercised when adding large amounts of soluble P to the environment. en_US
dc.language.iso en_US en_US
dc.relation.uri https://www.agronomy.org/publications/jeq/abstracts/43/2/488?search-result=1 en_US
dc.rights Permission to archive granted by American Society of Agronomy, Oct. 30, 2014. en_US
dc.subject Micro-X-Ray fluorescense en_US
dc.subject Micro-X-Ray absorption spectroscopy en_US
dc.subject Micro-X-Ray diffraction en_US
dc.subject Lead speciation en_US
dc.subject Phosphorus amendments en_US
dc.subject Smelter-contaminated soil en_US
dc.title Micro-X-Ray Fluorescence, Micro-X-Ray Absorption Spectroscopy, and Micro-X-Ray Diffraction Investigation of Lead Speciation after the Addition of Different Phosphorus Amendments to a Smelter-Contaminated Soil en_US
dc.type Article (author version) en_US
dc.date.published 2014 en_US
dc.citation.doi 10.2134/jeq2013.07.0281 en_US
dc.citation.epage 497 en_US
dc.citation.issue 2 en_US
dc.citation.jtitle Journal of Environmental Quality en_US
dc.citation.spage 488 en_US
dc.citation.volume 43 en_US
dc.contributor.authoreid gmp en_US
dc.contributor.authoreid ganga en_US


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