کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5354691 1503577 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Conformation evolution of oil contaminants onto aluminum oxide surface in aqueous solution: The effect of surface coverage
ترجمه فارسی عنوان
تکامل ترکیبات آلاینده های نفت بر روی سطح اکسید آلومینیوم در محلول آبی: اثر پوشش سطح
کلمات کلیدی
آلاینده های نفت، تغییر کنفورماسیونی، انتشار آب، شبیه سازی دینامیک مولکولی، پوشش سطح، کناره گیری،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
The microscopic conformational change process of oil contaminants adhered onto perfect α-Al2O3 (0001) surface in aqueous solution was investigated by using all-atom classic molecular dynamics simulations. The change in removal mechanism of oil contaminants induced by surface coverage (surface area per molecule) was emphatically explored. Our simulation results strongly reveal that the increase in oil surface coverage induces an evident difference in microscopic detachment processes of oil contaminants. At a low surface coverage, oil contaminants can be thoroughly detached from solid surface. The whole detachment process could be divided into multi stages, including conformational change of oil contaminants on solid surface, dynamic motion of those in bulk solution and rapid migration of those from bulk solution to air/water interface. With surface coverage increasing, water diffusion becomes the key to induce conformational change and promote the detachment of oil contaminants. When oil surface coverage exceeds a threshold value, oil contaminants also undertake an evident conformational change process exhibiting typical characteristics but an incomplete detachment process occurs. All findings of the present study are helpful for the interpretation of the removal mechanism of oil contaminants on solid surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 392, 15 January 2017, Pages 747-759
نویسندگان
, , , , ,