Computing the enthalpies of formation for alkali metal and alkaline earth metal oxides (M(x)O) and hydroxides [M(OH)(n)] using the Gaussian-n (Gn) and Weismann-n (Wn) ab initio model chemistries is difficult due to an improper treatment of core-valence electron correlation effects. Using a new model chemistry called the correlation consistent Composite Approach (ccCA), enthalpies of formation w...

A sample-pretreatment method using a chitosan-based chelating resin, ethylenediamine-N,N,N'-triacetate-type chitosan (EDTriA-type chitosan), was developed for the preconcentration of trace metals in seawater and separation of the seawater matrix prior to their determination by inductively coupled plasma-mass spectrometry (ICP-MS). The resin showed very good adsorption for transition metals and ...

Simulating sub-Milankovitch climate variations associated with vegetation dynamics E. Tuenter, S. L. Weber, F. J. Hilgen, and L. J. Lourens Royal Netherlands Meteorological Institute (KNMI), P.O. Box 201, 3730 AE De Bilt, The Netherlands Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, The Netherlands Received: 11 August 2006 – Accepted:...

In order to apply ionic liquids (ILs) to the separation of rare earth metals, liquid-liquid extraction of a series of rare earth elements into the ILs was investigated mainly using 1-octyl-3-methylimidazolium bis(trifluoromethyl sulfonyl) imide, [C8mim][Tf2N], with N,N-dioctyldiglycol amic acid (DODGAA) as the extractant. A higher selectivity was exhibited for the heavier rare earth elements as...

a Woods Hole Oceanographic Institution and Earth Sciences Department, University of California at Santa Cruz, United States b Pacific Geoscience Center, Geological Survey of Canada, Sydney, B.C., Canada, V8L 4B2 c Earth Sciences Department, University of California at Santa Cruz, United States d Earth and Environmental Sciences, University of Illinois at Chicago, United States e Department of G...

M. Hagens, C. P. Slomp, F. J. R. Meysman, D. Seitaj, J. Harlay, A. V. Borges, and J. J. Middelburg Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Utrecht, the Netherlands Department of Ecosystem Studies, Royal Netherlands Institute for Sea Research, Yerseke, the Netherlands Department of Analytical, Environmental and Geochemistry, Faculty of Science, Vrije Universitei...

a Faculty of Health, Engineering and Surveying and NCEA, University of Southern Queensland, Toowoomba, QLD, Australia b KTH Royal Institute of Technology, Stockholm, Sweden c KTH-International Groundwater Arsenic Research Group, Division of Land and Water Resources Engineering, Department of Sustainable Development, Environmental Sciences and Engineering, KTH Royal Institute of Technology, Stoc...

a Northern Centre for Isotopic and Elemental Tracing, Department of Earth Sciences, Durham University, South Road, Durham DH1 3LE, UK b Federal Institute for Geosciences and Natural Resources, Stilleweg 2, 30655, Hannover, Germany c Laboratoire de Minéralogie et Cosmochimie, Muséum National d'Histoire Naturelle and CNRS (UMR 7202), 61 rue Buffon, Paris 75005, France d Department of Geological S...