Speciation of mercury in soils and sediments by thermal evaporation and cold vapor atomic absorption

Sustainable remediation of mercury contaminated soils by thermal desorption

“…Authors mentioned above Bombach et al 1994;Palmieri et al 2006;Windmoller et al 1996) gave theoretical values of temperature at which some Hg forms are desorbed from soils. The results obtained in the present work are discussed according to them.…”

“…The furnace was opened to take samples at each temperature waiting until the temperature was below 40°C due to the nature of volatile compounds. Both the ramp rate to reach each target temperature and the corresponding hold time were 1 h. This ramp of temperature was chosen considering the literature which shows the thermal desorption curves of standard Hg compounds and the theoretical desorption temperatures for Hg associated to different fractions Bombach et al 1994;Palmieri et al 2006;Windmoller et al 1996).…”

Non-chromatographic atomic spectrometric methods in speciation analysis: A review

“…Analysis of samples from different, Hg-contaminated sites shows that it is possible to distinguish different Hg-binding forms in soils and sediments, by their thermal release characteristics [149]. Recently this behavior was used to speciate Hg in contaminated soil and sediment samples [150,151].…”

Mercury characterization in soil collected nearby the Department of Energy Oak Ridge reservation

“…Since different Hg species present in solid samples are expected to be released at different temperatures (Bombach et al, 1994;Windm3ller et al, 1996), thermal desorption may provide some information on Hg species present in soils. It has been reported that Hg , Hg 2 Cl 2 , HgCl 2 , HgS, and Hg associated with organic matter could be released at <150, 170, 220-250, 300-400, and 200-300 0 C, respectively (Biester et al, 2000;Bombach et al, 1994;Windm5ller et al, 1996). Therefore, it can be assumed that thermal desorption with temperature lower than 180 C adopted in the present study would primarily release Hg 0 and Hg 2 Cl 2 , and probably a small portion of other forms of Hg such as HgCl 2 , Hg(NO 3 ) 2 , HgO (WindmSller et al, 1996).…”

“…Thermal desorption analysis has also been used for Hg species in solid samples. It offers the advantages of being simple, fast, and cost-effective (Bombach et al, 1994). Spectroscopic techniques, such as X-ray absorption fine structure spectroscopy or X-ray microprobe spectroscopy, can provide a direct observation of Hg speciation.…”