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Zeolites and mercury Pt II
Quinta_Essentia Views: 15,178
Published: 12 years ago
This is a reply to # 1,354,871

Zeolites and mercury Pt II

interesting, found this study which does indeed show that some zeolites do take up mercury in solution. but how much they took up depended on the specific type of zeolite.

Species sensitivity of zeolite minerals for uptake of mercury solutes
L. S. Campbell1,*, A. Chimedtsogzol2,{dagger} and A. Dyer2

The uptake of inorganic Hg2+ and organometallic CH3Hg+ from aqueous solutions by 11 different natural zeolites has been investigated using a batch distribution coefficient (Kd) method and supported by a preliminary voltammetric study. The effect of mercury concentration on the Kd response is shown over an environmentally appropriate concentration range of 0.1–5 ppm inorganic and organometallic Hg using a batch factor of 100 ml g–1 and 20 h equilibration. Analcime and a Na-chabazite displayed the greatest methylmercury uptakes (Kd values at 1.5 ppm of 4023 and 3456, respectively), with mordenite as the smallest at 578. All uptake responses were greater for methylmercury than for the inorganic mercuric nitrate solutions, suggesting a distinctive sensitivity of zeolites to reaction with different types of solute species. It is likely that this sensitivity is attributable to the precise nature of the resultant Hg-zeolite bonds. Additionally, both the Si-Al ratio and the Na content of the initial natural zeolite samples are shown to influence the Kd responses, with positive correlations between Kd and Na content for all zeolites excluding mordenite.

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