کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5746594 | 1618803 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Solidification/stabilization of chromite ore processing residue using alkali-activated composite cementitious materials
ترجمه فارسی عنوان
جامد سازی / تثبیت باقی مانده از پردازش کرومیت سنگ معدن با استفاده از مواد سیمانی کامپوزیت فعال قلیایی
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کلمات کلیدی
جامد سازی / تثبیت، کرومیت سنگ معدن پردازش، سرباره کوره انفجار، خاکستر پرواز قلیایی فعال،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
Chromite Ore Processing Residue (COPR) produced in chromium salt production process causes a great health and environmental risk with Cr(VI) leaching. The solidification/stabilization (S/S) of COPR using alkali-activated blast furnace slag (BFS) and fly ash (FA) based cementitious material was investigated in this study. The optimum percentage of BFS and FA for preparing the alkali-activated BFS-FA binder had been studied. COPR was used to replace the amount of BFS-FA or ordinary Portland cement (OPC) for the preparation of the cementitious materials, respectively. The immobilization effect of the alkali-activated BFS-FA binder on COPR was much better than that of OPC based cementitious material. The potential for reusing the final treatment product as a readily available construction material was evaluated. X-ray diffraction (XRD), Fourier transform infrared spectrometry (FTIR) and scanning electron microscope with energy dispersive spectrometer (SEM-EDS) analysis indicated that COPR had been effectively immobilized. The solidification mechanism is the combined effect of reduction, ion exchange, precipitation, adsorption and physical fixation in the alkali-activated composite cementitious material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 168, February 2017, Pages 300-308
Journal: Chemosphere - Volume 168, February 2017, Pages 300-308
نویسندگان
Xiao Huang, RanLiang Zhuang, Faheem Muhammad, Lin Yu, YanChyuan Shiau, Dongwei Li,