HR: 0830h
AN: B51C-0971    [PDF]
TI: Hydrophillic Thiols in the Porewaters of Coastal Marine Sediments
AU: * Kalnejais, L
EM: lkalnejais@whoi.edu
AF: MIT-WHOI Joint Program in Oceanography, Woods Hole Oceanographic Institution Marine Chemistry and Geochemistry 260 Woods Hole Rd, Woods Hole, MA 02543 United States
AU: Martin, W R
EM: wmartin@whoi.edu
AF: Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry 260 Woods Hole Rd, Woods Hole, MA 02543 United States
AU: Moffett, J W
EM: jmoffett@whoi.edu
AF: Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry 260 Woods Hole Rd, Woods Hole, MA 02543 United States
AU: Nelson, R K
EM: rnelson@whoi.edu
AF: Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry 260 Woods Hole Rd, Woods Hole, MA 02543 United States
AU: Francois, R
EM: rfrancois@whoi.edu
AF: Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry 260 Woods Hole Rd, Woods Hole, MA 02543 United States
AB: Porewater profiles of thiolic compounds have been determined at a strongly reducing site in Boston Harbor, Massachusetts. Derivatization with monobromobimane followed by reverse phase high performance liquid chromatography and fluorescence detection have been used to detect at least six thiols in the porewaters. Maximum individual thiol concentrations of up to 10 $\mu$M (glutathione equivalents) were either coincident with the sulfide maximum or showed an increase with depth. The profiles of at least two thiols indicate a flux to the overlying water. Samples from a benthic chamber have detected glutathione and several of the unidentified thiols in the oxygenated water overlying these sediments. Silver, copper, and lead porewater profiles have also been determined so that the importance of the metal-RS complexation in porewaters can be considered.
DE: 4802 Anoxic environments
DE: 4804 Benthic processes/benthos
DE: 4805 Biogeochemical cycles (1615)
DE: 4807 Chemical speciation and complexation
DE: 4857 Pollution
SC: Biogeosciences [B]
MN: 2003 Fall Meeting