Search Results - (Author, Cooperation:H. A. Elliott)

Showing 1 - 8 results of 8, query time: 0.19s Refine Results
  1. 1
    Staff View
    Publication Date:
    2018-08-18
    Publisher:
    American Physical Society (APS)
    Print ISSN:
    0031-9007
    Electronic ISSN:
    1079-7114
    Topics:
    Physics
    Keywords:
    Plasma and Beam Physics
    Published by:
    http://www.aps.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2016-03-19
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    S. A. Stern ; F. Bagenal ; K. Ennico ; G. R. Gladstone ; W. M. Grundy ; W. B. McKinnon ; J. M. Moore ; C. B. Olkin ; J. R. Spencer ; H. A. Weaver ; L. A. Young ; T. Andert ; J. Andrews ; M. Banks ; B. Bauer ; J. Bauman ; O. S. Barnouin ; P. Bedini ; K. Beisser ; R. A. Beyer ; S. Bhaskaran ; R. P. Binzel ; E. Birath ; M. Bird ; D. J. Bogan ; A. Bowman ; V. J. Bray ; M. Brozovic ; C. Bryan ; M. R. Buckley ; M. W. Buie ; B. J. Buratti ; S. S. Bushman ; A. Calloway ; B. Carcich ; A. F. Cheng ; S. Conard ; C. A. Conrad ; J. C. Cook ; D. P. Cruikshank ; O. S. Custodio ; C. M. Dalle Ore ; C. Deboy ; Z. J. Dischner ; P. Dumont ; A. M. Earle ; H. A. Elliott ; J. Ercol ; C. M. Ernst ; T. Finley ; S. H. Flanigan ; G. Fountain ; M. J. Freeze ; T. Greathouse ; J. L. Green ; Y. Guo ; M. Hahn ; D. P. Hamilton ; S. A. Hamilton ; J. Hanley ; A. Harch ; H. M. Hart ; C. B. Hersman ; A. Hill ; M. E. Hill ; D. P. Hinson ; M. E. Holdridge ; M. Horanyi ; A. D. Howard ; C. J. Howett ; C. Jackman ; R. A. Jacobson ; D. E. Jennings ; J. A. Kammer ; H. K. Kang ; D. E. Kaufmann ; P. Kollmann ; S. M. Krimigis ; D. Kusnierkiewicz ; T. R. Lauer ; J. E. Lee ; K. L. Lindstrom ; I. R. Linscott ; C. M. Lisse ; A. W. Lunsford ; V. A. Mallder ; N. Martin ; D. J. McComas ; R. L. McNutt, Jr. ; D. Mehoke ; T. Mehoke ; E. D. Melin ; M. Mutchler ; D. Nelson ; F. Nimmo ; J. I. Nunez ; A. Ocampo ; W. M. Owen ; M. Paetzold ; B. Page ; A. H. Parker ; J. W. Parker ; F. Pelletier ; J. Peterson ; N. Pinkine ; M. Piquette ; S. B. Porter ; S. Protopapa ; J. Redfern ; H. J. Reitsema ; D. C. Reuter ; J. H. Roberts ; S. J. Robbins ; G. Rogers ; D. Rose ; K. Runyon ; K. D. Retherford ; M. G. Ryschkewitsch ; P. Schenk ; E. Schindhelm ; B. Sepan ; M. R. Showalter ; K. N. Singer ; M. Soluri ; D. Stanbridge ; A. J. Steffl ; D. F. Strobel ; T. Stryk ; M. E. Summers ; J. R. Szalay ; M. Tapley ; A. Taylor ; H. Taylor ; H. B. Throop ; C. C. Tsang ; G. L. Tyler ; O. M. Umurhan ; A. J. Verbiscer ; M. H. Versteeg ; M. Vincent ; R. Webbert ; S. Weidner ; G. E. Weigle, 2nd ; O. L. White ; K. Whittenburg ; B. G. Williams ; K. Williams ; S. Williams ; W. W. Woods ; A. M. Zangari ; E. Zirnstein
    American Association for the Advancement of Science (AAAS)
    Published 2015
    Staff View
    Publication Date:
    2015-10-17
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Brown, G. A. ; Elliott, H. A.
    Springer
    Published 1992
    Staff View
    ISSN:
    1573-2932
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract Because the economics of soil extraction processes depend on conservation and reuse of costly chelating agents, the ability of various electrolytes to modify EDTA extraction of Pb from a grossly-contaminated soil (PbT=21%) was investigated using batch equilibration experiments. In the absence of added electrolyte, a single 5-hr. extraction with 0.04 M EDTA (corresponding to 1∶1 PbT to EDTA ratio) released 65% of PbT over the pH 5 to 9 range. Under these conditions, Na+-, Li+-, and NH4ClO4 salts at 0.5 M increased Pb desorption to nearly 80%, probably from exchange displacement of soilbound Pb2+ and increased solubility of Pb-containing phases at higher ionic strength. Because Cl− and ClO4 − salts were equally effective, chlorocomplex formation was insignificant. Under slightly acidic conditions, Ca(ClO4)2 and Mg(ClO4)2 at 0.167 M caused roughly the same elevation in Pb recovery as 0.5M of the monovalent electrolytes. However, with progressively higher pH, Ca, and to a lesser extent Mg, suppressed Pb solubilization by competitive chelation of EDTA. Pb recovery by EDTA soil washing could be enhanced by addition of Ca salts at pH 4 to 6. Subsequent pH elevation in the presence of Ca would promote decomposition of Pb-EDTA complexes and separation of Pb as a hydroxide precipitate.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00478458

    Articles: DFG German National Licenses
  5. 5
    Elliott, H. A. ; Liberati, M. R. ; Huang, C. P.
    Springer
    Published 1986
    Staff View
    ISSN:
    1573-2932
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract The adsorption of Cd, Cu, Pb, and Zn from 0.025 M NaClO4 solutions by two ferruginous subsoils, Christiana silty clay loam and Dothan sandy clay, was investigated. Under acidic conditions, selective dissolution and removal of the Fe oxide soil component by dithionite-citrate-bicarbonate (DCB) generally increased heavy metal adsorption by the soils. This effect was attributed to increased electrostatic attraction of cations to the DCB-washed soils as evidenced by substantial reduction in the zero point of charge (ZPC) for the Dothan soil following DCB extraction. Alternately, the DCB extraction stripped Fe and Al species bound to structural exchange sites or eliminated coatings which reduce cation accessibility to such sites. Addition of low levels (10−6 M) of ferric iron suppressed heavy metal adsorption capacity of the DCB-extracted Christiana soil to values comparable to the unmodified whole soil system. While hydrous oxide surfaces represent highly reactive sites for cation binding, Fe oxides can modify both the pH-dependent and structural exchange sites in a manner which hinders heavy metal adsorption. Thus, a soil's Fe-oxide content is unlikely to be a reliable guide to heavy metal adsorption capacity.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00649419

    Articles: DFG German National Licenses
  6. 6
    Elliott, H. A. ; Brown, G. A.
    Springer
    Published 1989
    Staff View
    ISSN:
    1573-2932
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract Nitrilotriacetic acid (NTA) and ethylenediaminetetraacetic acid (EDTA) were compared for their ability to solubilize Pb from a highly-contaminated (PbT 21%) soil collected from a battery recycling facility. For chelant concentrations below 0.04 M (representing a 1:1 chelant-to-PbT molar ratio), EDTA released 10 to 30% more Pb than NTA. NTA-to-Pb T ratios greater than 1:1 reduced Pb recovery because of readsorption of Pb(NTA)2 4− onto positively-charged oxide soil components at pH 〈 8.5. For the EDTA system, however, complexation completely bound all coordination sites of Pb and EDTA, leaving no functional groups available for surface adsorption. Thus, Pb recovery progressively increased with higher EDTA concentrations, although the additional Pb release with each EDTA increment became smaller. For pH 〈 5 and EDTA/Pb of 2:1, Pb recovery exceeded 90%. The addition of 0.5 M NaC1O4 enhanced Pb recovery by EDTA for pH 5 to 12, but substantially suppressed recovery by NTA for pH 〈 11. Because Pb release by NTA was diminished by high ionic strength and chelant-to-metal ratios, NTA may be limited as a soil washing reagent. Stronger complexation and consistent Pb desorption behavior by EDTA favors its use.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00283464

    Articles: DFG German National Licenses
  7. 7
    Linn, J. H. ; Elliott, H. A.
    Springer
    Published 1988
    Staff View
    ISSN:
    1573-2932
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract Batch and upflow column leaching experiments were used to evaluate the nature and extent of Cu and Zn solubilization from contaminated soil by nitrilotriacetic acid (NTA) in 0.025 M NaClO4. In batch soil suspensions, NTA levels of 10−5 to 10−3 M substantially promoted Cu and Zn release from the metal-enriched soil. The ability of NTA to enhance Cu and Zn solubility decreased with increasing solution acidity probably due to competitive binding of NTA by protons and Fe released by hydrous oxide dissolution. However, in the pH range typically encountered in northeastern U.S. soils, soluble metal levels were nearly constant for a given NTA concentration. Leaching soil columns with NTA solutions enhanced Cu release more than Zn, as the enrichment ratio (cumulative metal leached by NTA compared to the 0.025 M NaClO4 control leachate) after 85 pore volumes displacements was 23.6 and 4.3 for Cu and Zn, respectively. While Cu release by 0.01 M CaCl2 differed little from the control, 0.01 M CaCl2 was substantially more effective than 10−5 M NTA in displacing bound Zn. The data reflect different retention mechanisms for Cu and Zn in this soil.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00192954

    Articles: DFG German National Licenses
  8. 8
    Elliott, H. A. ; Shastri, N. L.
    Springer
    Published 1999
    Staff View
    ISSN:
    1573-2932
    Keywords:
    EDTA ; metal-contaminated soils ; oxalate ; soil washing
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract Oxalate (Ox) was investigated as an extractant for decontaminating two metal-polluted soils, one with elevated total zinc (ZnT = 2700 mg kg-1) from the Palmerton, Pennsylvania smelter site and the other from a grossly contaminated (PbT = 210 000 mg kg-1) automobile battery recycling facility in Indiana. Metal retention within the soils was substantially different as shown by sequential fractionation experiments. High Zn removal (〉80%) was achieved with 1.0 M Ox when Zn existed predominantly in non-detrital metal fractions. However, Ox was an unsuitable Pb extractant due to the sparing solubility of PbOx(s). Despite the dramatically higher stability of ZnEDTA2- (log K = 16.5) compared to ZnOx° (log K = 3.4), Ox released more Zn than EDTA from the Palmerton soil because 40% of ZnT was associated with the oxide fraction. Extract analysis indicated that Ox, but nor EDTA, dissolved soil Fe oxides in the 24 hr extraction period. When contaminating metals are associated with soil oxides, Ox may be a superior extractant to powerful chelants like EDTA. It is essential to establish thoroughly metal solution chemistry and fixation behavior within the soil when extractive decontamination is proposed for site remediation.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1023/A:1005067404259

    Articles: DFG German National Licenses