view in publisher's site

Inhibited mechanism of carboxymethyl cellulose as a galena depressant in chalcopyrite and galena separation flotation

Highlights•CMC adsorbed much more easily to galena than chalcopyrite.•The adsorption kinetics of CMC on galena was best described using a pseudo-second-order model dominated by chemisorption.•74.4% of the electrochemical reaction sites on galena were inhibited by CMC and the resistance of the galena electrode surface film dramatically increased.AbstractCarboxymethyl cellulose (CMC) is a highly efficient, nontoxic, and biodegradable depressant in Cu-Pb separation. However, poor understanding of the interaction mechanism has hindered the application of CMC in this separation process. Herein, galena was entirely inhibited by 250 mg·L−1 CMC at pH above 10, with minor effects on chalcopyrite flotation. As confirmed in zeta potential tests, CMC adsorbed much more easily to galena than chalcopyrite. The adsorption kinetics of CMC on galena was best described using a pseudo-second-order model dominated by chemisorption. In the presence of CMC, 74.4% of the electrochemical reaction sites on galena were inhibited and the resistance of the galena electrode surface film dramatically increased from 3838.7 to 17547.5 Ω·cm2. The likely mechanism of CMC adsorption on galena is competitive adsorption between CMC and sulfate to Pb2+.


پر ارجاع‌ترین مقالات مرتبط:

  • مقاله General Chemistry
  • ترجمه مقاله General Chemistry
  • مقاله شیمی عمومی
  • ترجمه مقاله شیمی عمومی
  • مقاله Mechanical Engineering
  • ترجمه مقاله Mechanical Engineering
  • مقاله مهندسی مکانیک
  • ترجمه مقاله مهندسی مکانیک
  • مقاله Geotechnical Engineering and Engineering Geology
  • ترجمه مقاله Geotechnical Engineering and Engineering Geology
  • مقاله مهندسی ژئوتکنیکی و مهندسی زمین‌شناسی
  • ترجمه مقاله مهندسی ژئوتکنیکی و مهندسی زمین‌شناسی
  • مقاله Control and Systems Engineering
  • ترجمه مقاله Control and Systems Engineering
  • مقاله مهندسی کنترل و سیستم‌ها
  • ترجمه مقاله مهندسی کنترل و سیستم‌ها
سفارش ترجمه مقاله و کتاب - شروع کنید

95/12/18 - با استفاده از افزونه دانلود فایرفاکس و کروم٬ چکیده مقالات به صورت خودکار تشخیص داده شده و دکمه دانلود فری‌پیپر در صفحه چکیده نمایش داده می شود.