کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1569942 1514272 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sorption of silicon on magnetite and other corrosion products of iron
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Sorption of silicon on magnetite and other corrosion products of iron
چکیده انگلیسی

The sorption of Si on various iron corrosion products of nuclear waste canisters (magnetite Fe3O4, goethite α-FeOOH, and siderite FeCO3) and pyrite FeS2 was evidenced in the presence of a background electrolyte (NaCl or NaClO4). For magnetite, goethite and siderite, Si sorption increased with pH in the 3–7 pH range. It reached a plateau, and finally it decreased at pH more than 9. Sorption capacities were determined for magnetite (19×10-6molSigmagnetite-1), goethite (79×10-6molSiggoethite-1) and siderite (20×10-6molSigsiderite-1), while it could be neglected for pyrite since it is almost zero. Sorption data on magnetite was modelled using a surface complexation model with the bidentate surface complex (≡ XO)2Si(OH)2 and logKcomplexation=8.6logKcomplexation=8.6. Influence of magnetite on glass lifetime was evaluated and it was estimated negligible.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 348, Issues 1–2, 1 January 2006, Pages 60–69
نویسندگان
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