A BROWNIAN-PUMPING MODEL FOR OCEANIC TRACE-METAL SCAVENGING - EVIDENCE FROM TH-ISOTOPES
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abstract
Two observed characteristics of Th isotope and stable metal sorption in natural aquatic systems are seemingly at odds with physico-chemical adsorption theory: 1) characteristic sorption times of days to weeks and 2) Kds which are inversely related in magnitude to particle concentrations. Proposes that these metal sorption characteristics have the same underlying physical process in common: the coagulation of colloidal (nonfilterable) particles onto larger (filterable) particles. -from Authors