کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7077545 | 1459979 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of arsenic on nitrification of simulated mining water
ترجمه فارسی عنوان
اثر آرسنیک بر نیتریفیسیون آب معدنی شبیه سازی شده
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Mining and mineral processing of gold-bearing ores often release arsenic to the environment. Ammonium is released when N-based explosives or cyanide are used. Nitrification of simulated As-rich mining waters was investigated in batch bioassays using nitrifying cultures enriched in a fluidized-bed reactor (FBR). Nitrification was maintained at 100Â mg AsTOT/L. In batch assays, ammonium was totally oxidized by the FBR enrichment in 48Â h. As(III) oxidation to As(V) occurred during the first 3Â h attenuating arsenic toxicity to nitrification. At 150 and 200Â mg AsTOT/L, nitrification was inhibited by 25%. Candidatus Nitrospira defluvii and other nitrifying species mainly colonized the FBR. In conclusion, the FBR enriched cultures of municipal activated sludge origins tolerated high As concentrations making nitrification a potent process for mining water treatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 164, July 2014, Pages 149-154
Journal: Bioresource Technology - Volume 164, July 2014, Pages 149-154
نویسندگان
S. Papirio, G. Zou, A. Ylinen, F. Di Capua, F. Pirozzi, J.A. Puhakka,