FN Archimer Export Format
PT J
TI Speciation of dissolved copper within an active hydrothermal edifice on the Lucky Strike vent field (MAR, 37 degrees N)
BT 
AF SARRADIN, Pierre-Marie
   WAELES, M
   BERNAGOUT, Solene
   LE GALL, Christian
   SARRAZIN, Jozee
   RISO, R
AS 1:1;2:2,3;3:1;4:1;5:1;6:2,3;
FF 1:PDG-DOP-DCB-EEP-LEP;2:;3:PDG-DOP-DCB-EEP-LEP;4:PDG-DOP-DCB-EEP-LEP;5:PDG-DOP-DCB-EEP-LEP;6:;
C1 Ifremer Ctr Brest, Dept Etud Ecosyst Profonds, F-29280 Plouzane, France.
   UBO, Lab Chim Marine, F-29280 Plouzane, France.
   CNRS, UMR 7144, F-29280 Plouzane, France.
C2 IFREMER, FRANCE
   UBO, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-DOP-DCB-EEP-LEP
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.905
TC 35
TU Centre national de la recherche scientifique
   Université Pierre et Marie Curie
UR https://archimer.ifremer.fr/doc/2009/publication-5301.pdf
LA English
DT Article
CR MOMARETO
BO Unknown
DE ;Mid Atlantic Ridge;Hydrothermal vent;Speciation;Dissolved copper
AB The objective of this study was to deter-mine the concentrations of different fractions of dissolved copper (after filtration at 0.45 mu m) along the cold part of the hydrothermal fluid-seawater mixing zone on the Tour Eiffel edifice (MAR). Dissolved copper was analyzed by stripping chronopotentiometry (SCP) after chromatographic C-18 extraction. Levels of total dissolved copper (0.03 to 5.15 mu M) are much higher than those reported for deep-sea oceanic waters but in accordance with data previously obtained in this area. Speciation measurements show that the hydrophobic organic fraction (C18Cu) is very low (2 +/- 1%). Dissolved copper is present mainly as inorganic and hydrophilic organic complexes (nonC(18)CU). The distribution of copper along the pH gradient shows the same pattern for each fraction. Copper concentrations increase from pH 5.6 to 6.5 and then remain relatively constant at pH>6.5. Concentrations of oxygen and total sulphides demonstrate that the copper anomaly corresponds to the transition between suboxic and oxic waters. The increase of dissolved copper should correspond to the oxidative redissolution of copper sulphide particles formed in the vicinity of the fluid exit. The presence of such a secondary dissolved copper source, associated with the accumulation of metal sulphide particles, could play a significant role in the distribution of fauna in the different habitats available at vents.
PY 2009
SO Science of The Total Environment
SN 0048-9697
PU Elsevier
VL 407
IS 2
UT 000262076100014
BP 869
EP 878
DI 10.1016/j.scitotenv.2008.09.056
ID 5301
ER

EF