کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
623413 1455343 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Direct detection of calcium carbonate scaling via a pre-calcified sensitive area of a quartz crystal microbalance
ترجمه فارسی عنوان
تشخیص مستقیم پوسته شدن کربنات کلسیم از طریق یک منطقه حساس قبل از کلسیفیه از میکروبازار کریستال کوارتز
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی


• A microbalance with a pre-calcified sensitive electrode was developed.
• This gravimetric sensor can be used as an adsorption layer for carbonate nuclei.
• It was successfully applied to evaluate the scaling propensity of waters.
• This sensor can be used to assess the efficiency of humic substances towards scaling.

In an industrial cooling circuit supplied with raw river water, the scaling phenomenon can reduce cooling efficiency and even lead to the shutdown of the power plant. During the last twenty years, various methods have been developed in order to estimate the scaling propensity of natural waters, which involve the precipitation of calcium carbonate (CaCO3), the main component of scale. FCP (Fast Controlled Precipitation) is a non-electrochemical method which consists in CO2 degassing from water by moderate stirring. FCP allows quantifying the scaling propensity of natural water. However, FCP is not well adapted in the case of waters with low scaling propensities, or for in situ measurements.In this study, a quartz crystal microbalance with a pre-calcified sensitive electrode surface or SQCM (Scaling Quartz Crystal Microbalance) was developed. The sensitive surface of this gravimetric sensor could be used as an adsorption layer for calcium carbonate nuclei present in water. Thus, the SQCM method is able to detect the phenomenon of scaling, even if the water does not precipitate, due to its high gravimetric sensitivity. This method is described in details in this paper, and was successfully applied to evaluate the scaling propensity of synthetic waters. The SQCM could be used in situ to assess the efficiency of humic substances in synthetic water towards scaling.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 352, 3 November 2014, Pages 103–108
نویسندگان
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