Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 239-246 | DOI: 10.11118/actaun201058050239

NANOTEXTILNÍ MEMBRÁNY PRO ZACHYCENÍ BAKTERIÍ Escherichia coli

Jaroslav Lev1, Libor Kalhotka2, Michal Černý1
1 Ústav techniky a automobilové dopravy, Mendelova univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika
2 Ústav agrochemie, půdoznalství, mikrobiologie a výživy rostlin, Mendelova univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika

Práce popisuje experimentální práci zabývající se možností využití nanotextilních materiálů pro filtraci mikrobiologicky znečištěné vody nanotextilií. Cílem práce bylo ověřit filtrační schopností vybraných nanotextilních materiálů vyrobených metodou elektrospinningu a zhodnotit možnosti využití v praxi. Pro experiment byly použity nanotextilní vzorky z PA a PUR s rozdílnými materiálovými parametry a na různých nosných materiálech. Vzorky byly označeny (materiál nanovláken / nosná textilie) PA612/viskóza, PUR1/PP spunbond, PUR2/PP spunbond, PUR3/viskóza. Přes vzorky kruhového průřezu o průměru 48 mm (funkční průměr 38 mm) bylo filtrováno pomocí filtračního zařízení 100 ml mikrobiologicky znečištěné vody za přetlaku 105 Pa (1Bar). Pro simulaci mikrobiologického znečištění byly použity bakterie E. coli. Po filtraci byly vzorky inkubovány 72 hod při teplotě 37 °C. Po inkubaci byl proveden mikrobiologický rozbor vzorků před a po filtraci. Všechny nanotextilní materiály vykazovaly filtrační účinnost nad 94 %. Konkrétněji tři vrstvy PA612-99,580 %, PUR1-94,866 %, PUR2-99,996 %, PUR3-98,965 %. Podle výsledků nemá nosné médium podstatný vliv na účinnost filtrace, vzhledem k lepší adhezi nanotextilní vrstvy lze pro filtraci kapalin doporučit materiál nosného média z viskózy. Výsledky experimentu jsou dobrým předpokladem pro další experimenty s nanotextilním materiály pro filtraci kapalin a naznačují možné reálné použití membrán z nanotextilních materiálů pro úpravu vody v praxi.

nanotextilie, čištění vody, zachycení bakterií

Nanotextile membranes for bacteria Escherichia coli capturing

The article describes an experimental study dealing with the possibility of nanotextile materials usage for microbiologically contaminated water filtration. The aim of the study is to verify filtration ability of different nanotextile materials and evaluate the possibilities of practical usage. Good detention ability of these materials in the air filtration is the presumption for nanotextile to be used for bacteria filtration from a liquid. High nanotextile porosity with the nanotextile pores dimensions smaller than a bacteria size predicates the possibility of a successful usage of these materials. For the experiment were used materials made from electrospinning nanofibres under the label PA612, PUR1, PUR2 s PUR3 on the supporting unwoven textiles (viscose and PP). As a model simulation of the microbial contamination, bacteria Escherichia coli was chosen. Contaminated water was filtered during the overpressure activity of 105Pa on the input side of the filter from the mentioned material. After three-day incubation on the nutrient medium, cultures found in the samples before and after filtration were compared. In the filtrated water, bacteria E. coli were indicated, which did not verify the theoretical presumptions about an absolut bacteria detention. However, used materials caught at least 94% of bacteria in case of material PUR1 and up to 99,996% in case of material PUR2. These results predict the possibility of producing effective nanotextile filters for microbiologically contaminated water filtration.
Recommendation: For the production of materials with better filtrating qualities, experiments need to be done, enabling better understanding of the bacteria detention mechanisms on the nanotextile material, and parameters of the used materials that influence the filtrating abilities need to be verified.

Keywords: nanotextile membranes, water purification, bacteria capturing
Grants and funding:

Příspěvek byl financován s podporou Interní grantové agentury Mendelovy univerzity v Brně - Agronomické fakulty č. 2102/IG290161.

Received: March 15, 2010; Published: August 6, 2014  Show citation

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Lev, J., Kalhotka, L., & Černý, M. (2010). Nanotextile membranes for bacteria Escherichia coli capturing. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 58(5), 239-246. doi: 10.11118/actaun201058050239
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