Due to the active physicochemical properties of Hg, the mass difference between isotopes (7amu) is large and the volatility is strong. At present, it is known that various physical, chemical and biological processes related to Hg may cause isotope dynamic fractionation, and almost all the products of kinetic reactions are enriched in the light isotope of Hg (i.e., δ 202hg is negative), while the remaining reactants are rich in the same weight Morpheme<br>
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