کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5361524 1388274 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanocrystallization of CaCO3 at solid/liquid interfaces in magnetic field: A quantum approach
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Nanocrystallization of CaCO3 at solid/liquid interfaces in magnetic field: A quantum approach
چکیده انگلیسی
With the application of 1.2 T external magnetic field, 90% of CaCO3 soluble molecules in water flow precipitate on stainless steel 316 solid/liquid interface in the form of aragonite/vaterite. The magnetic field increases locally the thermodynamic potentials at interface, favoring the formation of aragonite than calcite, despite the fact that the field-free ground electronic state of aragonite is situated higher than of calcite. A quantum mechanical model predicts that magnetic fluctuations inside the liquid can be amplified by exchanging energy with an external magnetic field through the angular momentum of the water molecular rotors and with the macroscopic angular momentum of the turbulent flow. The theoretical model predicts that the gain is higher when the magnetic field is in resonance with the rotational frequencies of the molecular rotors or/and the low frequencies of the turbulent flow and that aragonite concentration is increasing at 0.4 T in agreement with the experimental results. Contrary to calcite, aragonite binds weakly on flow surfaces; and hence the process has significant industrial, environmental and biological impact.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 254, Issue 21, 30 August 2008, Pages 6715-6724
نویسندگان
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