FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2072945250> ?p ?o ?g. }

• W2072945250 endingPage "1366" @default.
• W2072945250 startingPage "1355" @default.
• W2072945250 abstract "—Interactions between oxide minerals and natural organic matter affect metal adsorption properties of mineral surfaces, but the mechanisms of metal bonding are not well understood. Extended X-ray absorption fine structure (EXAFS) spectroscopy analyses were performed on aqueous pastes containing Cu(II) and goethite (α-FeOOH) with humic acid adsorbed at 0, 14, 28, 57, 88, 216, and 236 g kg−1 goethite, and with aqueous suspensions of humic acid only. Analyses were conducted at the Cu K edge with 40 mmol Cu(II) kg−1 goethite or 2 mmol Cu(II) kg−1 suspension for the humic acid system. Samples were equilibrated at pH 5.6 in a 0.1 M NaNO3 background electrolyte. For all systems, analysis of EXAFS results suggests that Cu(II) is present in a distorted octahedral configuration containing four short equatorial (1.94–1.97 Å) and two longer axial bonds with oxygen. When the concentration of adsorbed humic acid on goethite was increased from 0 to 28 g kg−1, the axial Cu-O bond length decreased to 2.24 ± 0.03 Å, which was less than for individual humic acid (2.32 ± 0.02 Å) or goethite (2.29 ± 0.03 Å) samples. The apparent decrease in the axial Cu-O bond length was attributed to a decrease in the ligand field splitting energy. When humic acid ligands replace equatorial water molecules in the Cu(II) coordination sphere, a weaker ligand field strength occurs. For absorbed humic acid up to 88 g kg−1 goethite, second-shell iron neighbors were observed between 3.17 and 3.20 Å, suggesting that Cu(II) was bonded on average to both inorganic (goethite) and organic (humic acid) functional groups. In addition, derivative X-ray absorption near edge structure (XANES) spectra for Cu(II) on goethite–humate complexes (<88 g kg−1) were poorly fit by use of a linear combination of spectra for Cu(II) on goethite or humate alone. At humate concentrations between 216 and 236 g kg−1 goethite, second-shell iron neighbors could not be identified, and the Cu-Oaxial distance (2.32 ± 0.02 Å) and derivative XANES spectra strongly resembled that of Cu(II) adsorbed to humate only. Analysis of the XANES and EXAFS data suggested that Cu(II) was bonded on average to both inorganic and organic functional groups as a type A ternary complex at lower levels of adsorbed humate, and to organic groups as a type B complex at higher levels." @default.
• W2072945250 created "2016-06-24" @default.
• W2072945250 creator A5020110506 @default.
• W2072945250 creator A5024680752 @default.
• W2072945250 creator A5027832133 @default.
• W2072945250 creator A5038305261 @default.
• W2072945250 creator A5052458348 @default.
• W2072945250 creator A5075002624 @default.
• W2072945250 date "2001-05-01" @default.
• W2072945250 modified "2023-10-01" @default.
• W2072945250 title "Molecular scale characteristics of Cu(II) bonding in goethite–humate complexes" @default.
• W2072945250 cites W1506079020 @default.
• W2072945250 cites W1528963263 @default.
• W2072945250 cites W1923793469 @default.
• W2072945250 cites W1967660071 @default.
• W2072945250 cites W1972252730 @default.
• W2072945250 cites W1972511080 @default.
• W2072945250 cites W1975736150 @default.
• W2072945250 cites W1987435546 @default.
• W2072945250 cites W1988296342 @default.
• W2072945250 cites W1994733596 @default.
• W2072945250 cites W1996577995 @default.
• W2072945250 cites W1997454446 @default.
• W2072945250 cites W2006098598 @default.
• W2072945250 cites W2012586901 @default.
• W2072945250 cites W2023692073 @default.
• W2072945250 cites W2027991998 @default.
• W2072945250 cites W2029035107 @default.
• W2072945250 cites W2029612625 @default.
• W2072945250 cites W2030434346 @default.
• W2072945250 cites W2035108492 @default.
• W2072945250 cites W2052907015 @default.
• W2072945250 cites W2053056874 @default.
• W2072945250 cites W2069236076 @default.
• W2072945250 cites W2069275370 @default.
• W2072945250 cites W2072098845 @default.
• W2072945250 cites W2079658152 @default.
• W2072945250 cites W2090407758 @default.
• W2072945250 cites W2093952206 @default.
• W2072945250 cites W2094605044 @default.
• W2072945250 cites W2114627689 @default.
• W2072945250 cites W2120772354 @default.
• W2072945250 cites W2122250081 @default.
• W2072945250 cites W2134692642 @default.
• W2072945250 cites W2142586898 @default.
• W2072945250 cites W2143720165 @default.
• W2072945250 cites W2145956196 @default.
• W2072945250 cites W2167590372 @default.
• W2072945250 cites W2169212772 @default.
• W2072945250 doi "https://doi.org/10.1016/s0016-7037(01)00546-4" @default.
• W2072945250 hasPublicationYear "2001" @default.
• W2072945250 type Work @default.
• W2072945250 sameAs 2072945250 @default.
• W2072945250 citedByCount "175" @default.
• W2072945250 countsByYear W20729452502012 @default.
• W2072945250 countsByYear W20729452502013 @default.
• W2072945250 countsByYear W20729452502014 @default.
• W2072945250 countsByYear W20729452502015 @default.
• W2072945250 countsByYear W20729452502016 @default.
• W2072945250 countsByYear W20729452502017 @default.
• W2072945250 countsByYear W20729452502018 @default.
• W2072945250 countsByYear W20729452502019 @default.
• W2072945250 countsByYear W20729452502020 @default.
• W2072945250 countsByYear W20729452502021 @default.
• W2072945250 countsByYear W20729452502022 @default.
• W2072945250 countsByYear W20729452502023 @default.
• W2072945250 crossrefType "journal-article" @default.
• W2072945250 hasAuthorship W2072945250A5020110506 @default.
• W2072945250 hasAuthorship W2072945250A5024680752 @default.
• W2072945250 hasAuthorship W2072945250A5027832133 @default.
• W2072945250 hasAuthorship W2072945250A5038305261 @default.
• W2072945250 hasAuthorship W2072945250A5052458348 @default.
• W2072945250 hasAuthorship W2072945250A5075002624 @default.
• W2072945250 hasConcept C107861141 @default.
• W2072945250 hasConcept C11181451 @default.
• W2072945250 hasConcept C116569031 @default.
• W2072945250 hasConcept C119824511 @default.
• W2072945250 hasConcept C121332964 @default.
• W2072945250 hasConcept C145148216 @default.
• W2072945250 hasConcept C147789679 @default.
• W2072945250 hasConcept C150394285 @default.
• W2072945250 hasConcept C170493617 @default.
• W2072945250 hasConcept C178790620 @default.
• W2072945250 hasConcept C179104552 @default.
• W2072945250 hasConcept C184651966 @default.
• W2072945250 hasConcept C185592680 @default.
• W2072945250 hasConcept C2777787761 @default.
• W2072945250 hasConcept C2780560099 @default.
• W2072945250 hasConcept C2780965034 @default.
• W2072945250 hasConcept C544153396 @default.
• W2072945250 hasConcept C544778455 @default.
• W2072945250 hasConcept C55493867 @default.
• W2072945250 hasConcept C57805442 @default.
• W2072945250 hasConcept C62520636 @default.
• W2072945250 hasConcept C8010536 @default.
• W2072945250 hasConceptScore W2072945250C107861141 @default.
• W2072945250 hasConceptScore W2072945250C11181451 @default.
• W2072945250 hasConceptScore W2072945250C116569031 @default.

• next