کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4769469 | 1425778 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Integrated acid mine drainage treatment using Mg(OH)2 or Mg(HCO3)2 and Ca(OH)2: Implications for separate removal of metals and sulphate
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, the influence of mole ratio dosage of Mg(OH)2 and Mg(HCO3)2 to that of Fe2Â + and factors influencing the rate of Fe2Â + oxidation were studied using simulated AMD. In addition, the consequence of AMD treatment first with Mg(OH)2/Mg(HCO3)2 and then Ca(OH)2 were evaluated. The optimised method was applied to real AMD. The result shows mole ratio of Mg(OH)2/Mg(HCO3)2 to Fe2Â + 2:1 in which aeration accompanied with stirring was found the best proportion for complete removal of Fe2Â + and other metals in the form of metal hydroxide precipitate in <Â 30Â min. Unlike the conventional method, pre-treatment of AMD either with Mg(OH)2 or Mg(HCO3)2 prevent gypsum precipitation along with metal hydroxides. Thus, the metal hydroxide and gypsum were obtained from AMD treatment separately. The metal hydroxides and gypsum could be used for different industrial applications. Furthermore, the possibilities of recovery and reuse of magnesium hydroxide from the sludge were also developed. Generally, the analysis results confirmed the importance of treatment order and possibility of applying the optimised method at the plant scale.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mineral Processing - Volume 155, 10 October 2016, Pages 83-90
Journal: International Journal of Mineral Processing - Volume 155, 10 October 2016, Pages 83-90
نویسندگان
Vhahangwele Akinwekomi, Kebede K. Kefeni, Jannie P. Maree, Titus A.M. Msagati,