کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
633943 | 1456045 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Non-microbial indicators for monitoring virus removal by ultrafiltration membranes
ترجمه فارسی عنوان
شاخص های غیر میکروبی برای نظارت بر حذف ویروس توسط غشاهای اولترافیلتراسیون
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
نظارت جامع، اعتبار سنجی غشاء، نانوذرات نقره، بازیافت آب،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
The integrity of 0.04 µm polyvinylidene fluoride hollow fibre ultrafiltration (UF) membranes was assessed by challenge tests with citrate stabilised silver nanoparticles. Spherical, zerovalent, nanosilver particles maintained a net negative surface charge (â25±4 mV) and narrow size distribution (60±10 nm) in aqueous suspension for 72 h. Nanoparticle challenge testing of intact UF hollow fibre membranes demonstrated rejection efficiency as high as 2.9 log removal value (LRV), without affecting the hydraulic performance of the membranes. Challenge testing of deliberately compromised membranes through a sequence of breaches indicated that the nanoparticles can detect a loss of integrity in the filtration area of 3Ã10â5%, equivalent to 3 damaged fibres in 100,000 fibres. The LRV decreased from 2.8 to 1.3 with one pin hole of 100 μm thickness. Membranes were exposed to hypochlorite in order to mimic membrane ageing; exposure to 2500 and 5000 mg Lâ1 h of hypochlorite decreased the rejection efficiency of the particles by 0.2% and 0.9% with a corresponding loss in the intrinsic membrane resistance of 19% and 38%, respectively. Deliberate membrane compromise through chemical exposure was useful for generating membrane degradation that represented the initial stages of membrane failure due to routine chemical exposure. Considering the practical limitations of incorporating challenge testing with MS2 bacteriophage in full scale plants, silver nanoparticles have the potential to be an alternative indicator for challenging UF membranes for validation purposes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 454, 15 March 2014, Pages 193-199
Journal: Journal of Membrane Science - Volume 454, 15 March 2014, Pages 193-199
نویسندگان
Alice Antony, Judy Blackbeard, Mark Angles, Greg Leslie,