کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6972385 | 1453099 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Toxicity assessment of inorganic nanoparticles to acetoclastic and hydrogenotrophic methanogenic activity in anaerobic granular sludge
ترجمه فارسی عنوان
ارزیابی سمی بودن نانوذرات معدنی به فعالیت متانوژنز استاتولوژیک و هیدروتروفیف در لجن گرانول بی هوازی
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
چکیده انگلیسی
Release of engineered nanoparticles (NPs) to municipal wastewater from industrial and residential sources could impact biological systems in wastewater treatment plants. Methanogenic inhibition can cause failure of anaerobic waste(water) treatment. This study investigated the inhibitory effect of a wide array of inorganic NPs (Ag0, Al2O3, CeO2, Cu0, CuO, Fe0, Fe2O3, Mn2O3, SiO2, TiO2, and ZnO supplied up to 1500 mg Lâ1) to acetoclastic and hydrogenotrophic methanogenic activity of anaerobic granular sludge. Of all the NPs tested, only Cu0 and ZnO caused severe methanogenic inhibition. The 50% inhibiting concentrations determined towards acetoclastic and hydrogenotrophic methanogens were 62 and 68 mg Lâ1 for Cu0 NP; and 87 and 250 mg Lâ1 for ZnO NP, respectively. CuO NPs also caused inhibition of acetoclastic methanogens. Cu2+ and Zn2+ salts caused similar levels of inhibition as Cu0 and ZnO NPs based on equilibrium soluble metal concentrations measured during the assays, suggesting that the toxicity was due to the release of metal ions by NP-corrosion. A commercial dispersant, Dispex, intended to increase NP stability did not affect the inhibitory impact of the NPs. The results taken as a whole suggest that Zn- and Cu-containing NPs can release metal ions that are inhibitory for methanogenesis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 260, 15 September 2013, Pages 278-285
Journal: Journal of Hazardous Materials - Volume 260, 15 September 2013, Pages 278-285
نویسندگان
Jorge Gonzalez-Estrella, Reyes Sierra-Alvarez, James A. Field,