کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8046326 1519036 2018 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel study on the influence of cork waste residue on metakaolin-zeolite based geopolymers
ترجمه فارسی عنوان
یک مطالعه جدید در مورد تاثیر ضایعات چوب پنبه بر ژئوپلیمرهای مبتنی بر متاکائولین زئولیت
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی
The effect of industrial waste from the cork industry on the strength and adsorption properties of zeolite-metakaolin based geopolymers has been studied. Cork residue 20% by weight was added to geopolymers that contained 0%, 25%, 50%, 75% replacement of metakaolin by zeolite in the structure. The SiO2/Al2O3 and Na2O/Al2O3 molar ratios were kept at 1 to reduce the environmental impact of sodium silicate and sodium hydroxide to the minimum. The compressive strength evolution after 1, 14 and 28 days in water and the heavy metals (Cd2+, Cr3+, Cu2+, Pb2+, and Zn2+) adsorption of the geopolymers were determined. It was found that addition of zeolite and cork residue in minor amounts concurrently aided in increasing the compressive strength of geopolymers. The adsorption properties, however, were dominated by the presence of cork residue and metakaolin which resulted in increasing adsorption of all heavy metal cations with increasing metakaolin in the structure. The adsorption was well fitted by the Langmuir model with R2 > 0.98 and the trend of adsorption was found to be Pb2+ > Cd2+ > Cu2+, Zn2+ > Cr3+. The significant improvement in compressive strength, as well as adsorption capacity observed with the addition of cork waste residue, connotes that it can be efficient as filler in geopolymers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volume 152, February 2018, Pages 196-210
نویسندگان
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