کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
213850 1425788 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Cu2 + activation on interfacial water structure at the sphalerite surface as studied by molecular dynamics simulation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Effect of Cu2 + activation on interfacial water structure at the sphalerite surface as studied by molecular dynamics simulation
چکیده انگلیسی


• A fresh sphalerite surface has modest hydrophobicity.
• Contact angles reveal the increased hydrophobicity of Cu2 + activated sphalerite.
• MDS reasonably predicts the contact angles for fresh/Cu2 + activated sphalerite.
• Interfacial water analysis shows weaker interaction at copper sulfide surfaces.
• Copper sulfide surfaces have increased hydrophobicity compared to ZnS.

In the first part of this paper, an experimental contact angle study of fresh and Cu2 + activated sphalerite-ZnS surfaces as well as the covellite-CuS (001) surface is reported describing the increased hydrophobic character of the surface during Cu2 + activation. In addition to these experimental results, fresh sphalerite-ZnS (110), copper-zinc sulfide-CuZnS2 (110), villamaninite-CuS2 (100), and covellite-CuS (001) surfaces were examined using Molecular Dynamics Simulation (MDS). Our MDS results on the behavior of interfacial water at the fresh sphalerite-ZnS (110), copper-zinc sulfide-CuZnS2 (110), villamaninite-CuS2 (100), and covellite-CuS (001) surfaces include simulated contact angles, water number density distribution, water dipole orientation, water residence time, and hydrogen-bonding considerations. The copper content at the Cu2 + activated sphalerite surface seems to account for the increased hydrophobicity as revealed by both experimental and MD simulated contact angle measurements. The relatively greater hydrophobic character developed at the Cu2 + activated sphalerite surface and at the copper sulfide surfaces has been described by MDS, based on the structure of interfacial water and its dynamic properties.

Interfacial water at the fresh sphalerite-ZnS (110), copper-zinc sulfide-CuZnS2 (110), villamaninite-CuS2 (100) and covellite-CuS (001) surfaces.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mineral Processing - Volume 145, 10 December 2015, Pages 66–76
نویسندگان
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