Pyromorphite formation from montmorillonite adsorbed lead

• Autorzy: Bajda T. , Marchlewski T. , Manecki M.

Identyfikatory

DOI

10.2478/v10002-011-0008-5

• Języki publikacji: EN

Abstrakty

EN

The reaction of Pb-adsorbed montmorillonite with aqueous solutions of PO4 and Cl ions results in the decrease in phosphate concentration associated with the formation of a new phase – pyromorphite Pb5(PO4)3Cl. Pyromorphite crystals range in size from hundreds of nm to several tens of μm, depending on the PO4, K, and Ca concentrations in the reacting system. A strong ion-exchange effect of K+ and Ca2+ cations on desorption of Pb2+ from Pb-adsorbed montmorillonite was observed. Also, a high concentration of cations leads to a rapid desorption of Pb and the formation of fine pyromorphite crystals. In contrast, low PO4, K and Ca concentrations result in the formation of relatively large euhedral crystals. Final Pb concentrations are much lower in experimental sets than in control experiments with no phosphate present.

Słowa kluczowe

EN

sorption; desorption; immobilization; crystallization; apatite; smectite

• Wydawca: Mineralogical Society of Poland
• Czasopismo: Mineralogia
• Rocznik: 2011
• Tom: Vol. 42, iss. 2/3
• Strony: 75--91
• Opis fizyczny: Bibliogr. 32 poz., rys., tab., wykr.

Twórcy

autor

Bajda T.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30, 30–059 Krakow, Poland

autor

Marchlewski T.

• Department of Geological Sciences, Miami University, Oxford, Ohio, USA

autor

Manecki M.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30, 30–059 Krakow, Poland

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