Mechanistic Studies and Tool Development

Slide presentation describing 2008 field and lab studies on mercury behavior in the South River. Topics include hyporheic sampling at Basic Park gravel bars, characterization of reactive Hg(II) in surface waters, and methylmercury desorption kinetics from sediments. Results show elevated hyporheic total Hg, shallow MeHg peaks, Hg(II) tracking filter‑passing Hg, and rapid desorption (first‑order, t1/2 ≈1–2 hr).