کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1694966 1519087 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ion exchange in amorphous alkali-activated aluminosilicates: Potassium based geopolymers
ترجمه فارسی عنوان
مبادله یون در آلومینوسیلیکات های فعال با قلیایی غیر آلی: پتاسیم مبتنی بر پتاسیم
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی


• Cation exchange properties were determined for K based geopolymer.
• Aqueous treatment of geopolymer causes alteration of textural properties.
• Cationic selectivity of geopolymer for K over Cs has been shown.

Ion exchange properties of pure potassium-based geopolymer (pure K-GP) formulated with Si/Al = 2.1 and K/Al = 1.0 ± 0.02 atomic ratios have been studied. For pure K-GP, the maximum ion-exchange level of K+ with respect to Na+ and Cs+ is 77 and 61%, respectively, as determined by exhausted exchange with 1 M solutions of appropriate nitrates at 22 ± 2 °C. The geopolymer shows a slight preference for K+ over Cs+ as indicated by the normalized Cs/K-GP isotherm obtained under noncompetitive exchange. Parent geopolymer yields a pure geopolymer when it is extensively washed with deionized water until neutral pH is obtained and equilibrated with aqueous solution of KNO3 resulting in changing in composition and textural properties. As calculated from N2 sorption–desorption isotherms, surface specific area and cumulative pore volume for parent K-GP are 5.5 m2 g− 1 and 0.01 cm3 g− 1, respectively, whereas for pure K-GP surface specific area and cumulative pore volume are 270 m2 g− 1 and 0.4 cm3 g− 1, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volume 87, January 2014, Pages 205–211
نویسندگان
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