کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4910168 | 1427601 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparative column testing of three reactive mixtures for the bio-chemical treatment of iron-rich acid mine drainage
ترجمه فارسی عنوان
تست مقایسه مقادیر سه مخلوط واکنش پذیر برای درمان بیولوژیکی زهکشی اسید معدن غنی از آهن
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The reactors were operated with hydraulic retention times (HRTs) of 1 to 5 d over a period of 16-63Â days. In the WA-DAS reactors, results showed that a minimum HRT of 2 d was required to remove 33-62% of Fe in AMD with 2500Â mg/L Fe. The calcite-DAS showed limited Fe removal (<10%) in AMD at >1500Â mg/L Fe, but was around 40% at <1500Â mg/L Fe, over a 7-day period, at 2 d of HRT. Slight increase of the PBRs efficiency was found (77% and 91%), at initial Fe concentration of 500Â mg/L, when the HRT was doubled (from 2.5 d to 5 d). All reactors removed other metals (37-99.9% for Al, Zn, and Pb; 20-98% for Ni, except in C20) and SO42â (5-37%). Evolution of the hydraulic parameters of all reactors showed insignificant variation of the initial porosity of 0.68-0.74 and ksat around 10â2Â cm/s, indicating no evidence of clogging throughout the testing period, even at 5 d of HRT. Nonetheless, Fe removal was HRT-dependent. Therefore, water quality, especially Fe concentration, should be among the design criteria for a long-term satisfactory treatment of Fe-rich AMD.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Minerals Engineering - Volume 111, September 2017, Pages 79-89
Journal: Minerals Engineering - Volume 111, September 2017, Pages 79-89
نویسندگان
Tsiverihasina V. Rakotonimaro, Carmen M. Neculita, Bruno Bussière, Gérald J. Zagury,