کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5021440 1469373 2017 46 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Immobilization of hexavalent chromium by fly ash-based geopolymers
ترجمه فارسی عنوان
امولسیون کروم شش ظرفیتی توسط ژئوپلیمرهای مبتنی بر خاکستر
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
In this paper the immobilization of hexavalent chromium (Cr (VI)) by fly ash (FA)-based geopolymers was investigated, depending on FA characteristics, mechanical activation of FA, geopolymer synthesis conditions and concentration of Cr added. The effectiveness of Cr immobilization was determined via investigation of geopolymer compressive strength and Cr leaching. Structural changes of geopolymers during the Cr immobilization were assessed by means of gas adsorption, XRD, and NMR analysis. FA reactivity was a key factor determining both physical-mechanical and immobilizing properties of geopolymers. Mechanical activation of FA caused an increase of both geopolymer strength and effectiveness of Cr immobilization. The presence of Cr induced physical-mechanical and structural changes in geopolymers. The correlation between concentration of Cr leached and geopolymer physical-mechanical and structural parameters was established.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 112, 1 March 2017, Pages 213-223
نویسندگان
, , , , ,