کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8046429 1519037 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of methylene blue adsorption on bentonite measured using the spot and colorimetric methods
ترجمه فارسی عنوان
مقایسه جذب متیلن آبی با بنتونیت با استفاده از روش های نقطه و رنگ سنجی اندازه گیری شد
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی
The maximum amount of methylene blue (MB) adsorbed on montmorillonite in bentonite can be determined using a spot or colorimetric method to evaluate the quality of bentonite. The spot method differs from the colorimetric method in terms of the procedure used to add MB solution to a bentonite dispersion and the procedure to determine the maximum amount of MB. In the spot method, MB solution is added in a step-by-step process and the maximum amount is determined by observing a spot of MB and bentonite on filter paper. In the colorimetric method, MB is added only once and the maximum amount is determined using a spectrophotometer. This study revealed that the maximum amount of MB adsorbed onto bentonite measured using the spot method differs from that measured using the colorimetric method. The maximum amount measured using the colorimetric method can be estimated by multiplying the amount measured using the spot method by 0.937. To ascertain why the maximum amounts measured using the two methods differ, we examined bentonites using a newly proposed method (a step-by-step colorimetric method), in which MB is added in a step-by-step manner and the maximum amount is determined using a spectrophotometer. The maximum amount measured using the step-by-step colorimetric method showed that step-by-step addition of MB decreases the maximum amount. The decrease can be explained by the re-flocculation of montmorillonite particles in bentonite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volume 151, January 2018, Pages 140-147
نویسندگان
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