کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4989373 | 1455977 | 2017 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Passage of soft pathogens through microfiltration membranes scales with transmembrane pressure
ترجمه فارسی عنوان
عبور پاتوژن های نرم از طریق غشای میکروفیلتراسیون با فشار ترانسمیتر
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کلمات کلیدی
PESTSBATCCLRVTMPPSDNIPSASTMPVPNonsolvent-induced phase separationDLSAFMDeformation - تغییر شکلBacteria - باکتریDeformability - تغییر شکل پذیریParticle size distribution - توزیع اندازه ذراتAmerican society for testing and materials - جامعه آمریکایی برای آزمایش و موادtrypticase soy broth - سیب سویاPhages - فاژهاTransmembrane pressure - فشار مخروطیMycoplasma - مایکوپلاسماAmerican Type Culture Collection - مجموعه فرهنگی نوع آمریکاییYoung’s modulus - مدول یانگatomic force microscopy - میکروسکوپ نیروی اتمیMicrofiltration - میکروفیفتراسیونSoftness - نرمیRetention - نگهداریDynamic Light Scattering - پراکندگی نور دینامیکیpolyethersulfone - پلی اترسولفونpolyvinylpyrrolidone - پلی وینیل پیرولیدون
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
This experimental study elucidates the impact of transmembrane pressure and particle deformability on the retention of biological and non-biological particles by porous microfiltration polymer membranes in dead-end filtration processes. Bacteriophages, mycoplasma, common bacteria and polystyrene model particles, ranging from 0.02 µm to 1.5 µm in particle diameter, were chosen due to their industrial relevance as well as due to their expected differences in deformability. For each particle type, precipitation cast polyethersulfone membranes with a sponge-like structure were tailor-made in order to achieve two levels of retention for the respective particle type. The transmembrane pressure was varied from 10 to 950 kPa and the stiffness of the particles was measured with atomic force microscopy. A good correlation between particle stiffness on the one hand and the impact of transmembrane pressure on particle retention on the other hand was observed. The present study suggests that mycoplasma and Gram-negative bacteria are easily deformable at low forces, which explains that they are thus able to squeeze through membrane pores when transmembrane pressure is increased. In contrast, for the relatively stiff Gram-positive bacteria, much higher transmembrane pressures were needed to show a retention decrease. Bacteriophages and polystyrene beads did not show higher passage at the exerted transmembrane pressures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 522, 15 January 2017, Pages 292-302
Journal: Journal of Membrane Science - Volume 522, 15 January 2017, Pages 292-302
نویسندگان
Alexander Helling, Alexander Kubicka, Iwan A.T. Schaap, Milan Polakovic, Björn Hansmann, Holger Thiess, Jochen Strube, Volkmar Thom,