The design and application of sequential extractions for mercury, Part 2. Resorption of mercury onto the sample during leaching

Sorption and stability of mercury on activated carbon for emission control

“…The details of the GSC sequential extraction procedure for determining which phases contain Hg are given by Hall and Pelchat [10]. The successive solutions used were (1) The concentrations in the extracted liquids from both procedures were sufficiently high that the Hg could be analysed by inductively coupled plasma optical emission spectrometry (ICP-OES).…”

“…A variety of methods of sequential extraction for Hg have been reported [9] although none have been applied to mercury captured on activated carbon sorbents. The scheme chosen for this study was that used by the Geological Survey of Canada (GSC) because a detailed investigation aimed at optimising the distinction between the sulfide forms of Hg and the non-sulfide phases was successfully concluded [10]. Since it is thought that much of the mercury captured by sulfurimpregnated activated carbon is in the form of particles of HgS, it is essential to be able to reliably distinguish this phase from elemental Hg either physically adsorbed or chemisorbed onto the surface of the carbon.…”

Mineralogical and geochemical alteration of Hitura sulphide mine tailings with emphasis on nickel mobility and retention

“…precipitation) caused by remnants of previous reagents or sample losses during filtrations, which may decrease the recovery in later steps of the procedure (e.g. Hall and Pelchat, 2005;Alakangas and Öhlander, 2006). In a non-sequential extraction scheme, separate subsamples are leached with extractive solutions of increasing aggressivity, assuming that the stronger extractants dissolve also the phases leached with the weaker solutions.…”

Effect of Inorganic Carbonate in Thermal Treatment of Mercury-contaminated Soil

“…A six-step sequential extraction proposed by Hall and Pelchat (2005) was conducted for Hg extraction from contaminated soils, which included soluble and exchangeable (step 1), labile organic components (Step 2), amorphous oxide-bound (Step 3), crystalline oxide-bound (Step 4), non-labile organic and elemental (Step 5), and sul de-bound and residual (Step 6) fractions. A detailed description of the sequential extraction procedure used in this study is summarized in Table S1.…”