Fumigant methyl iodide can methylate inorganic mercury species in natural waters

Mechanistic steps in the photoreduction of mercury in natural waters

Elemental mercury accounts for 10-50% of the dissolved mercury in lakes but plays a vital role in the cycling of this element in lacustrine environments. The view is advanced that a large fraction of the Hg(0) is generated by photochemical reactions in the surface waters. Possible mechanisms for the Hg(0) production are discussed including homogeneous photolysis of dissolved Hg species and phot...

Mercury speciation in natural waters: Measurement of dissolved gaseous mercury with a field analyzer

Mercury evasion from water is commonly modeled using measurements of dissolved gaseous mercury (DGM). We developed a method using a recently available automated field-ready mercury vapor analyzer to rapidly measure the concentrations of DGM in surface waters. We summarize here results of laboratory tests of the method, field intercomparisons with a manual method, and selected data from recent s...

Releasing Hormone Following Inorganic Iodide

Eight euthyroid subjects were administered 500ƒÊg of thyrotropin-releasing hormone intravenously before and after the administration of 10mg potassium iodide daily for 7 days. Basal serum concentrations of TSH and the response of TSH to TRH were significantly increased following iodide treatment, while serum levels of T4 and T3 did not differ significantly. It is suggested that the administrati...

Methyl iodide poisoning.

Methyl mercury and inorganic mercury in Swedish pregnant women and in cord blood: influence of fish consumption.

We studied exposure to methyl mercury (MeHg) in Swedish pregnant women (total mercury [T-Hg] in hair) and their fetuses (MeHg in cord blood) in relation to fish intake. The women were recruited at antenatal care clinics in late pregnancy to participate in an exposure study of environmental pollutants. Fish consumption was evaluated using food frequency questionnaires including detailed question...