| pubmed-article:15871244 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:15871244 | lifeskim:mentions | umls-concept:C1883254 | lld:lifeskim |
| pubmed-article:15871244 | lifeskim:mentions | umls-concept:C0301630 | lld:lifeskim |
| pubmed-article:15871244 | lifeskim:mentions | umls-concept:C0001674 | lld:lifeskim |
| pubmed-article:15871244 | lifeskim:mentions | umls-concept:C0520514 | lld:lifeskim |
| pubmed-article:15871244 | lifeskim:mentions | umls-concept:C0300269 | lld:lifeskim |
| pubmed-article:15871244 | pubmed:issue | 7 | lld:pubmed |
| pubmed-article:15871244 | pubmed:dateCreated | 2005-5-5 | lld:pubmed |
| pubmed-article:15871244 | pubmed:abstractText | Changes in aqueous- and solid-phase plutonium oxidation state were monitored over time in hematite (alpha-Fe2O3) and goethite (alpha-FeOOH) suspensions containing 239Pu(V)-amended 0.01 M NaCl. Solid-phase oxidation state distribution was quantified by leaching plutonium into the aqueous phase and applying an ultrafiltration/solvent extraction technique. The technique was verified using oxidation state analogues of plutonium and sediment-free controls of known Pu oxidation state. Batch kinetic experiments were conducted at hematite and goethite concentrations between 10 and 500 m2 L(-1) in the pH range of 3-8. Surface-mediated reduction of Pu(V) was observed for both minerals at pH values of 4.5 and greater. At pH 3 no adsorption of Pu(V) was observed on either goethite or hematite; consequently, no reduction was observed. For hematite, adsorption of Pu(V) was the rate-limiting step in the adsorption/reduction process. In the pH range of 5-8, the overall removal of Pu(V) from the system (solid and aqueous phases) was found to be approximately second order with respect to hematite concentration and of order -0.39 with respect to the hydrogen ion concentration. The overall reaction rate constant (k(rxn)), including both adsorption and reduction of Pu(V), was 1.75+/-2.05 x 10(-10) (m(-2) L)(-2.08) (mol(-1) L)(-0.39) (s(-1)). In contrast to hematite, Pu(V) adsorption to goethite occurred rapidly relative to reduction. At a given pH,the reduction rate was approximately independent of the goethite concentration, although the hydrogen ion concentration (pH) had only a slight effect on the overall reaction rate. For goethite, the overall reaction rates at pH 5 and pH 8 were 6.0 x 10(-5) and 1.5 x 10(-4) s(-1), respectively. For hematite, the reaction rate increased by 3 orders of magnitude across the same pH range. | lld:pubmed |
| pubmed-article:15871244 | pubmed:language | eng | lld:pubmed |
| pubmed-article:15871244 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:15871244 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:15871244 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:15871244 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:15871244 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:15871244 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:15871244 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:15871244 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:15871244 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:15871244 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:15871244 | pubmed:month | Apr | lld:pubmed |
| pubmed-article:15871244 | pubmed:issn | 0013-936X | lld:pubmed |
| pubmed-article:15871244 | pubmed:author | pubmed-author:SerkizSteven... | lld:pubmed |
| pubmed-article:15871244 | pubmed:author | pubmed-author:FjeldRobert... | lld:pubmed |
| pubmed-article:15871244 | pubmed:author | pubmed-author:CoatesJohn... | lld:pubmed |
| pubmed-article:15871244 | pubmed:author | pubmed-author:KaplanDaniel... | lld:pubmed |
| pubmed-article:15871244 | pubmed:author | pubmed-author:PowellBrian... | lld:pubmed |
| pubmed-article:15871244 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:15871244 | pubmed:day | 1 | lld:pubmed |
| pubmed-article:15871244 | pubmed:volume | 39 | lld:pubmed |
| pubmed-article:15871244 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:15871244 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:15871244 | pubmed:pagination | 2107-14 | lld:pubmed |
| pubmed-article:15871244 | pubmed:dateRevised | 2010-11-18 | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:meshHeading | pubmed-meshheading:15871244... | lld:pubmed |
| pubmed-article:15871244 | pubmed:year | 2005 | lld:pubmed |
| pubmed-article:15871244 | pubmed:articleTitle | Pu(V)O2+ adsorption and reduction by synthetic hematite and goethite. | lld:pubmed |
| pubmed-article:15871244 | pubmed:affiliation | Department of Environmental Engineering and Science, Clemson University, Anderson, South Carolina 29625, USA. BAPowell@lbl.gov | lld:pubmed |
| pubmed-article:15871244 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:15871244 | pubmed:publicationType | Comparative Study | lld:pubmed |
| pubmed-article:15871244 | pubmed:publicationType | Research Support, U.S. Gov't, Non-P.H.S. | lld:pubmed |
| pubmed-article:15871244 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |
