FN Archimer Export Format
PT J
TI The behavior of Al, Mn, Ba, Sr, REE and Th isotopes during in vitro degradation of large marine particles
BT 
AF ARRAES-MESCOFF, R
   ROY-BARMAN, M
   COPPOLA, L
   SOUHAUT, M
   TACHIKAWA, K
   JEANDEL, C
   SEMPERE, R
   YORO, C
AS 1:1;2:1;3:1;4:1;5:1;6:1;7:2;8:2;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 LEGOS/UMR 5566, 14 Avenue Edouard Belin, 31400 Toulouse, France
   LMM, CNRS/INSU, Campus de Luminy, F13288 Marseille Cedex 9, France
C2 LEGOS, FRANCE
   UNIV AIX MARSEILLE, FRANCE
IF 2.056
TC 50
UR https://archimer.ifremer.fr/doc/00300/41128/40316.pdf
LA English
DT Article
CR EIMETO 4
BO Professeur Georges Petit
DE ;marine particles;dissolution;trace elements;thorium isotopes;western Mediterranean Sea
AB m) concentrations of Al, Sr, Ba, Mn, Rare Earth Elements (REE) and Th isotopes were determined over time. We obtain percentages of dissolution in agreement with the general knowledge about the solubility of these tracers: Th approximate to Al < Heavy REE < Light REE < Mn < Ba < Sr. For Mn and Ce, precipitation/adsorption occurs at the end of the experiment probably due to their oxidation as insoluble oxides. Particulate residence time of the tracers ranged from less than 1 day to 10-14 days. During the experiment, biological activity has a control on the dissolution process through the remineralization of particulate organic carbon, In the 30 m experiment, the observed dissolution of aragonite indicates that the pH of the incubation solution significantly decreases in response to the CO2 respiration. Speciation calculations suggest that this pH shift leads to a decrease of the complexation of dissolved REE by carbonate ions. Th isotope data are consistent with an irreversible dissolution of Th and they do not support a rapid particle-solution chemical equilibrium. 
PY 2001
PD JAN
SO Marine Chemistry
SN 0304-4203
PU Elsevier Science Bv
VL 73
IS 1
UT 000166133300001
BP 1
EP 19
DI 10.1016/S0304-4203(00)00065-7
ID 41128
ER

EF