Itiswellknowntha tth etoxicityandenvironmenta lfateofmercurystronglydependsonitschemicalforms. Undervariousnaturalconditionsinorganic mercurymaybeconvertedt overytoxicmonomethylmercury (CH 3HG+abbreviatedt omethylmercury Hợp chất MeHg), whichten dt obioaccumulatein th eaquaticand/o rterrestria lfoodchain. Itisestimatedtha t40-50% ofth eHg ° cyclingthroug hth e atmosphereisinitiallyofanthropogenicoriginlargely song ca oth ecombustionofcoal, miningandsmeltingores (particularlyinCuandZnsmelting), industria lproductionprocesses (particularlyinth eHgcell chloroalkaliprocessforproductionofgaseouschlorine andsodiumhydroxide
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