Other Trace elements Sample Clauses

Other Trace elements. V, Mn, Ni, Cr, Co, Cu, Zn, Pb, Cd, U 97 3.4.3. Geochemistry and size fractionation of Rare Earth Elements 98 3.4.4. Proportion of colloidal fraction 99 3.4.5. Partition coefficient Kd 101 3.5. Conclusions and prospectives for climate warming 102 References 104 Tables 109 Figures 114 Аnnex A 124 Electronic Annex 132 CHAPTER 4 Stable (Cu, Mg) and radiogenic (Sr, Nd) isotope fractionation in colloids of boreal organic- xxxx xxxxxx 139 Keywords 141 Abstract 141 4.1. Introduction 142 4.2. Study sites 144 4.3. Materials and methods 146 4.3.1. Sampling and filtration 146 4.3.2. Chemical analysis 147
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Other Trace elements. V, Mn, Ni, Cr, Co, Cu, Zn, Pb, Cd, U The change of V, Ni, Cr, Co, Cu, and Mn concentration along the watershed of Vostochniy stream is rather similar: they decrease by 30-80 % from OR-9 to OR-6 and then remain constant until the stream mouth (OR-1), finally decreasing towards the terminal lakes OR-8, thus generally following the behavior of Fe. The uranium concentration systematically increases, by a factor of 8 along the profile of Vostochniy stream, from soil solution to terminal lake. Concentrations of Cd, Zn, Co, Mn and Pb do not exhibit any systematic variations along the Vostochniy watershed profile. Other metal micronutrients or biologically relevant elements (V, Ni, Cr, Cu, Zn) exhibit rather small evolution of total dissolved concentration. For the Palojoki watershed, U concentration significantly increases, by a factor of 4 where as Cd, Co, Mn and Pb do not exhibit any systematic trend ranging by a factor of 5 to 100 among different landscape components of the Palojoki river.
Other Trace elements. V, Mn, Ni, Cr, Co, Cu, Zn, Pb, Cd, U In filtrates and ultrafiltrates, Mn, Co and V are much better correlated with Fe compared to DOC. Cr, Ni, Cu, Zn, Cu, Cd do not exhibit any significant correlation with Fe or DOC. A link between Fe and Pb can be evidenced for the feeding bog of Palojoki river (KAR-2) as well as in soil solution and Vostochniy stream and the lake (OR-1, OR-8, OR-9). Vanadium is also linked to Fe in samples OR-1, OR-6, OR-9 which do not exhibit any connection to DOC concentration in filtrates and ultrafiltrates. Similar to numerous previous works (Xxxxxxxxx et al., 1998; Xxx et al., 2000; Xxxxxxxxx and Xxxxxx, 2002), uranium is strongly correlated with Fe but in less degree with OC in all samples of Palojoki watershed.

Related to Other Trace elements

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