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1 de nov. de 2020 · In the determination of mercury species like MeHg, EtHg, and In-Hg, several parameters like flow rate, sample volume, eluent type and pH have a direct effect on the sensitivity of measurements [36]. Therefore, optimisation is still required before using this method, especially with different mercury speciation.
- A critical review of mercury speciation ... - ScienceDirect
Różański et al. (2016) found a low mobility and availability...
- A critical review of mercury speciation ... - ScienceDirect
1 de may. de 2019 · They added Hg 0 and HgCl 2 to three surface soil samples of pH 5.6–5.8 containing 1.6–2.7% OM and monitored the Hg transformation via thermodesorption. After maintaining the samples in ambient temperature or low temperature (4 °C) dark conditions a large portion of Hg 0 was oxidized to Hg 2+ (~36–88%).
7 de sept. de 2016 · The quantity of accumulated mercury in aquatic organisms is affected by such factors as the level in the trophic chain (the higher level in the trophic chain it is, the more mercury is stored in it), the age of organisms, the microbial activity, the mercury concentration in the sediment layer, the content of the soluble fraction of organic matter, salinity, pH, and the redox potential (Kamman ...
4 de mar. de 2015 · This study suggests that abiotic and dark Hg(II) reduction depends on the pH and salinity of aqueous medium. At lower pH (∼4.0) and lower salinity (≤5.0 PSU), the reduction of Hg(II) to elemental mercury (Hg0) was comparatively rapid.
29 de mar. de 2016 · Chen et al. [Citation 25], reported “green” and rapid separation method for Hg 2+, MeHg, EtHg, and PhHg species in which the separation was carried out with two consecutive 12.5 mm strong cation exchange guard columns, with 2.0 mM L-cysteine or thiourea (pH 2.0) as the mobile phase, coupled to ICP-MS for detection.
3 de ago. de 2017 · Conceptual schema of the interactions of biofilms with mercury species. Specific zooms are on (a) the chemical speciation in the ambient water, (b) the extracellular matrix composition, and (c) the processes in the vicinity of the microorganisms embedded in the biofilm matrix.(d) Depth profile of light, O 2, CO 2, and MeHg at the microorganism–biofilm matrix interface at day and night.
