Behavior of KCl sorbent traps and KCl trapping solutions used for atmospheric mercury speciation: stability and specificity
نویسندگان
چکیده
Abstract. Atmospheric mercury speciation is of paramount importance for understanding the behavior once it emitted into atmosphere as gaseous elemental (GEM), oxidized (GOM) and particulate-bound (PBM). GOM PBM can also be formed in atmosphere; their sampling most problematic step atmospheric speciation. with traps composed KCl sorbent materials trapping solutions are commonly used methods, although research conducted them at ambient air concentrations limited. The results specificity test demonstrated that highly specific when using new traps, while drops dramatically they reused. stability indicated highest Hg2+ losses (up to 5.5 % loss) occur low amounts (< 1 ng) loaded, due a reduction Hg0. have been considered selective media samples. A dimensionless Henry law constant was experimentally derived calculate solubility Hg solution. degree GEM oxidation established by purging calibration gas solution determining trapped aqueous-phase propylation liquid–liquid extraction chromatography–atomic fluorescence spectrometry (GC-AFS) measurement. positive bias observed solutions, strongly suggesting this approach unsuitable measurements.
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ژورنال
عنوان ژورنال: Atmospheric Measurement Techniques
سال: 2021
ISSN: ['1867-1381', '1867-8548']
DOI: https://doi.org/10.5194/amt-14-6619-2021