Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Walter Lund"'
Publikováno v:
Geochemistry: Exploration, Environment, Analysis. 11:225-231
Metallophytes have the ability to grow in metal-rich soils without showing signs of toxicity. It is believed that chelating of metals to organic ligands is a mechanism that metal-tolerant plants use for detoxification. To obtain information about met
Autor:
Harald Justnes, Erik Stoltenberg-Hansson, Hans A. van der Sloot, Grethe Wibetoe, Christian J. Engelsen, Walter Lund
Publikováno v:
Cement and Concrete Research. 40:1639-1649
The pH dependent release of Cd, Cr, Cu, Mn, Mo, Ni, Pb, V and Zn from different recycled concrete aggregate samples was determined. Geochemical speciation modelling was applied on the concentrations of Cu, Cr, Mo and Ni in the leachates in order to p
Publikováno v:
Talanta. 82:158-163
Solid phase extraction (SPE) methods based on multiple extractions have been developed to overcome matrix interferences in the charge-based fractionation analysis of As, Cr, Mo, Sb, Se and V leached from cement-based materials. Disposable SPE tubes p
Publikováno v:
J. Anal. At. Spectrom.. 25:169-177
A solid phase extraction (SPE) method has been developed for the separation of As(III), Sb(III) and Se(IV) from As(V), Sb(V) and Se(VI) in leachates of cementitious construction materials. The leachates were treated with ammonium pyrrolidine dithioca
Autor:
Erik Stoltenberg-Hansson, Hans A. van der Sloot, Grethe Wibetoe, Gordana Petkovic, Christian J. Engelsen, Walter Lund
Publikováno v:
Cement and Concrete Research. 39:446-459
The pH dependent leaching characteristics were assessed for different types of recycled concrete aggregates, including real construction debris and crushed fresh concrete samples prepared in laboratory. Carbonation effects were identified from the ch
Publikováno v:
Geochemistry: Exploration, Environment, Analysis. 7:49-56
A multi-element study was performed for metal-tolerant plants and the associated soils collected from four mineralized areas in Botswana using ICP-AES and ICP-MS. The elements were determined in the roots, stems and leaves of the three metallophytes,
Publikováno v:
Journal of Geochemical Exploration. 86:130-142
Plant species that accumulate high levels of metals in proportion to the metal content in the soil are of considerable interest in biogeochemical and biogeobotanical prospecting. This study was aimed at investigating copper and nickel accumulation in
Publikováno v:
Environmental Science & Technology. 36:5421-5425
The use of commercially available solid phase extraction (SPE) cartridges for the fractionation of Al and Fe in soil water is described. The quantitative determination was done by inductively coupled plasma atomic emission spectrometry (ICP-AES). Dif
Autor:
Hilde Th. Uggerud, Walter Lund
Publikováno v:
Fresenius' Journal of Analytical Chemistry. 368:162-165
A comparison is made of four sample introduction techniques for the determination of As by inductively coupled plasma mass spectrometry. The techniques studied were 1) flow injection with pneumatic nebulization (FIA-PN), 2) direct electrothermal vapo
Autor:
Anders Tangen, Walter Lund
Publikováno v:
Journal of Chromatography A. 891:129-138
A modified microconcentric nebulizer (MCN-100) has been used to construct an improved interface with minimised liquid and gas phase dead volumes for the coupling of capillary electrophoresis (CE) and inductively coupled plasma mass spectrometry (ICP-