Modeled Trace Element Concentrations and Partitioning in the San

Jul 12, 2010 - Concentrations of several trace elements are high enough to adversely affect biota within San Francisco Bay (1, 2), while high levels o...
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Environ. Sci. Technol. 2010, 44, 5956–5963

Modeled Trace Element Concentrations and Partitioning in the San Francisco Estuary, Based on Suspended Solids Concentration MICHELLE D. BENOIT,† R A P H A E L M . K U D E L A , * ,† A N D A. RUSSELL FLEGAL‡ Department of Ocean Sciences, University of California, Santa Cruz California 95064, and Institute of Marine Science, University of California, Santa Cruz, Santa Cruz California 95064

Received February 2, 2010. Revised manuscript received June 15, 2010. Accepted June 29, 2010.

Although trace element (Ag, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Se, and Zn) and methylmercury (MeHg) concentrations have been systematically sampled 1-3 times per year throughout the San Francisco Bay estuary for more than two decades, those collections do not capture episodic events that may govern the biogeochemical cycles of these elements in the Bay and adjacent Pacific coastal waters. Analyses of the partitioning of in situ elemental concentrations between particulate and total dissolved (