Abstract

Speciation of mercury compounds in environmental and biological samples requires different techniques and different approaches. This speciation is mandatory to explain the toxicity, the reactivity and the bioavailability of mercury. It is dominated by inorganic mercury species Hg(II) and Hg(0), and the organic mercury species CH3Hg and (CH3)2Hg. In this paper, some aspects of mercury speciation are presented in terms of: - mercury reactivity (Hg(II) complexation and reduction), - mercury species distribution in the main compartments of the environment La spéciation du mercure dans les échantillons environnementaux et biologiques nécessite différentes techniques et différentes approches. Cette spéciation permet d’expliquer la toxicité, la réactivité et la biodisponibilité du mercure. Elle est dominée par les espèces de mercure inorganique Hg(II) et Hg(0) et les espèces organiques CH3Hg et (CH3)2Hg. Dans cet article, quelques aspects de la spéciation du mercure sont présentés en termes de : - réactivité du mercure (complexation et réduction de Hg(II)), - distribution des espèces du mercure dans les principaux compartiments de l’environnement.

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