Advances in the Characterization of Phosphorus in Organic Wastes: Environmental and Agronomic Applications

Toor, Gurpal S.; Hunger, Stefan; Peak, John D.; Sims, J. T.; Sparks, Donald L.

doi:10.1016/s0065-2113(05)89001-7

Cited by 123 publications

(108 citation statements)

References 141 publications

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“…1B. Pre-edge peaks, the edge position, and post-edge features in P XANES data can be used to probe phosphate speciation in environmental samples (George, 1993;Toor et al, 2006). Organic P species such as those associated with biomass often exhibit one broad post-edge peak centered between 2167 and 2170 eV, depending on the compound (Brandes et al, 2007;Hesterberg, 2010).…”

Section: Phosphorus K-edge Xanesmentioning

confidence: 99%

The product of microbial uranium reduction includes multiple species with U(IV)–phosphate coordination

Alessi

Lezama‐Pacheco

Stubbs

et al. 2014

Geochimica et Cosmochimica Acta

123

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Until recently, the reduction of U(VI) to U(IV) during bioremediation was assumed to produce solely the sparingly soluble mineral uraninite, UO 2(s) . However, results from several laboratories reveal other species of U(IV) characterized by the absence of an EXAFS U-U pair correlation (referred to here as noncrystalline U(IV)). Because it lacks the crystalline structure of uraninite, this species is likely to be more labile and susceptible to reoxidation. In the case of single species cultures, analyses of U extended X-ray fine structure (EXAFS) spectra have previously suggested U(IV) coordination to carboxyl, phosphoryl or carbonate groups. In spite of this evidence, little is understood about the species that make up noncrystalline U(IV), their structural chemistry and the nature of the U(IV)-ligand interactions. Here, we use infrared spectroscopy (IR), uranium L III -edge X-ray absorption spectroscopy (XAS), and phosphorus K-edge XAS analyses to constrain the binding environments of phosphate and uranium associated with Shewanella oneidensis MR-1 bacterial cells. Systems tested as a function of pH included: cells under metal-reducing conditions without uranium, cells under reducing conditions that produced primarily uraninite, and cells under reducing conditions that produced primarily biomass-associated noncrystalline U(IV). P X-ray absorption near-edge structure (XANES) results provided clear and direct evidence of U(IV) coordination to phosphate. Infrared (IR) spectroscopy revealed a pronounced perturbation of phosphate functional groups in the presence of uranium. Analysis of these data provides evidence that U(IV) is coordinated to a range of phosphate species, including monomers and polymerized networks. U EXAFS analyses and a chemical extraction measurements support these conclusions. The results of this study provide new insights into the binding mechanisms of biomass-associated U(IV) species which in turn sheds light on the mechanisms of biological U(VI) reduction.

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Section: Phosphorus K-edge Xanesmentioning

confidence: 99%

The product of microbial uranium reduction includes multiple species with U(IV)–phosphate coordination

Alessi

Lezama‐Pacheco

Stubbs

et al. 2014

Geochimica et Cosmochimica Acta

123

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“…Synchrotron-based P K-edge XANES spectroscopy provides an extraordinarily valuable method to investigate the solid-phase species of P in heterogeneous samples such as soils (Ajiboye et al, 2008;Beauchemin et al, 2003;Kizewski et al, 2011), sediments (Giguet-Covex et al, 2013), and wastes (Toor et al, 2006). This technique is a nondestructive molecular probe for P speciation and is especially efficient for inorganic P (P i ) forms with unique spectral fingerprints.…”

Section: Molecular Speciation Of Phosphorus Present In Readily Dispermentioning

confidence: 99%

Molecular Speciation of Phosphorus Present in Readily Dispersible Colloids from Agricultural Soils

Liu

Yang

Liang

et al. 2014

Soil Science Society of America Journal

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“…P can occur in numerous inorganic and organic compounds and bioavailability varies among them (Toor et al 2006). Bioavailability of P in each residue can be difficult to predict.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus availability in residues as fertilizers in organic agriculture

Føreid

2017

AFSci

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Phosphorus (P) should be recycled from organic wastes as much as possible, and input is needed in stockless organic agriculture. Seven organic residues were assessed and compared them to mineral P fertilizer and rock phosphate as fertilizer for barley. P availability in the mixtures and residual P availability were also assessed by diffusive gradients in thin films (DGT). The best availability was found in digested liquid manure followed by wood ash, fish sludge, composted solid manure and composted food waste. Meat and bone meal, the commercially available product Ladybug plus and rock phosphate had low P availability at the same level as no P. Only wood ash had significant P available for the next crop. The pH level of the soil did not affect P availability for any of the P sources. DGT predicted P availability moderately well, as it measures P supply over a short period without any biological factors.

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Advances in the Characterization of Phosphorus in Organic Wastes: Environmental and Agronomic Applications

Cited by 123 publications

References 141 publications

The product of microbial uranium reduction includes multiple species with U(IV)–phosphate coordination

The product of microbial uranium reduction includes multiple species with U(IV)–phosphate coordination

Molecular Speciation of Phosphorus Present in Readily Dispersible Colloids from Agricultural Soils

Phosphorus availability in residues as fertilizers in organic agriculture

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