Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

Keskin, Nalan Oya San; Çelebioğlu, Aslı; Sarioglu, Omer Faruk; Özkan, Alper D.; Uyar, Tamer; Tekinay, Turgay

doi:10.1039/c5ra15601g

Cited by 37 publications

(25 citation statements)

References 36 publications

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“…23 In the present study, we focused on anionic surfactant bioremediation and therefore produced novel biocomposite webs by immobilization of two different SDS degrading bacterial strains on electrospun nCA and pCA webs. It was observed that, bacterial cells strongly immobilized on nCA and pCA brous surfaces, the bacteria immobilized webs exhibited similar biodegradation performances with free STB3 and STB4 cells and can be reused for several cycles of SDS biodegradation with recovery capabilities.…”

Section: Reusability and Applicability Of Stb3/pca And Stb4/ Pca Biocmentioning

confidence: 99%

Evaluation of contact time and fiber morphology on bacterial immobilization for development of novel surfactant degrading nanofibrous webs

et al. 2015

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Novel electrospun fibrous biocomposites were developed by immobilizing two different sodium dodecyl sulfate (SDS) biodegrading bacterial strains, Serratia proteamaculans STB3 and Achromobacter xylosoxidans STB4 on electrospun non-porous cellulose acetate (nCA) and porous cellulose acetate (pCA) webs. The required contact time for bacterial immobilization was determined by SEM imaging and viable cell counting of the immobilized bacteria, and bacterial attachment was ended at day 25 based on these results. SDS biodegradation capabilities of bacteria immobilized webs were evaluated at different concentrations of SDS, and found to be highly efficient at concentrations up to 100 mg L À1 . It was observed that SDS remediation capabilities of bacteria immobilized webs were primarily based on the bacterial existence and very similar to the free-bacterial cells. A reusability test was applied on the two most efficient webs (STB3/pCA and STB4/pCA) at 100 mg L À1 SDS, and the results suggest that the webs are potentially reusable and improvable for SDS remediation in water. SEM images of bacteria immobilized webs after the reusability test demonstrate strong bacterial adhesion onto the fibrous surfaces, which was also supported by the viable cell counting results. Our results are highly promising and suggest that bacteria immobilized electrospun fibrous webs have the potential to be used effectively and continually for remediation of SDS from aqueous environments.

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Section: Reusability and Applicability Of Stb3/pca And Stb4/ Pca Biocmentioning

confidence: 99%

Evaluation of contact time and fiber morphology on bacterial immobilization for development of novel surfactant degrading nanofibrous webs

et al. 2015

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“…The Lysinibacillus sp. NOSK culture isolated from wastewater treatment system [35] was routinely maintained in Nutrient Broth (NB) medium. The working bacterial culture was prepared from the stock culture stored at −20 • C in 70% (v/v) sterile glycerol.…”

Section: Cultivation Of Bacterium In Nutrient Broth (Nb)mentioning

confidence: 99%

“…Adsorption coefficients were estimated via seven isotherm models (Langmuir, Langmuir with linear partitioning, Freundlich, Freundlich with linear partitioning, Generalized Langmuir-Freundlich, Toth, Linear) using the isotherm parameter fitting software IsoFit [35]. The mean of three individual determinations was used to calculate cell counts.…”

Section: Adsorption Isotherms and Kinetics Studiesmentioning

confidence: 99%

Encapsulation of living bacteria in electrospun cyclodextrin ultrathin fibers for bioremediation of heavy metals and reactive dye from wastewater

Keskin

Çelebioğlu

Sarioglu

et al. 2018

Colloids and Surfaces B: Biointerfaces

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Cyclodextrins (CD) are cyclic oligosaccharides produced from the enzymatic degradation of starch as a white powder form; on the other hand, they can be transformed into ultrathin electrospun fiber form by electrospinning technique. The electrospun cyclodextrin fibers (CD-F) can be quite attractive materials to encapsulate bacteria for bioremediation purposes. For instance, CD-F not only serve as a carrier matrix but also it serves as a feeding source for the encapsulated bacteria. In the present study, we demonstrate a facile approach by encapsulation of bacteria into CD-F matrix for wastewater treatment application. The natural and non-toxic properties of CD-F render a better bacterial viability for fibrous biocomposite. The encapsulated bacteria in CD-F exhibit cell viability for more than 7days at 4°C storage condition. Furthermore, we have tested the bioremediation capability of bacteria/CD-F biocomposite for the treatment of heavy metals (Nickel(II) and Chromium(VI)) and textile dye (Reactive Black 5, RB5). The bacteria/CD-F biocomposite has shown removal efficiency of Ni(II), Cr(VI) and RB5 as 70±0.2%, 58±1.4% and 82±0.8, respectively. As anticipated, the pollutants removal capabilities of the bacteria/CD-F was higher compare to free bacteria since bacteria can use CD as an extra carbon source which promotes their growth rate. This study demonstrates that CD-F are suitable platforms for the encapsulation of bacterial cells to develop novel biocomposites that have bioremediation capabilities for wastewater treatment.

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“…This is also possible in case of organic materials, which in addition can be processed in an easier way than the inorganic ones, are more flexible for modifications in terms of specific 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 3 process needs, and are available at moderate cost 8 . In this regard, electrospun organic fibers have become an alternative as microorganism carriers in water bioremediation studies [9][10][11][12][13] . The attention received by this type of synthetic materials has been mainly due to their analogy with natural nanofibrous protein networks (morphology, mechanics and surface chemistry), and their high biocompatibility with human cells 14 , which makes them suitable to be used in human healthcare applications.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Polycaprolactone Microfibers as Biofilm Carriers for Biotechnologically Relevant Bacteria

Tamayo-Ramos

Rumbo

Caso³

et al. 2018

ACS Appl. Mater. Interfaces

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Polymeric electrospun fibers are becoming popular in microbial biotechnology because of their exceptional physicochemical characteristics, biodegradability, surface-to-volume ratio, and compatibility with biological systems, which give them a great potential as microbial supports to be used in production processes or environmental applications. In this work, we analyzed and compared the ability of Escherichia coli, Pseudomonas putida, Brevundimonas diminuta, and Sphingobium fuliginis to develop biofilms on different types of polycaprolactone (PCL) microfibers. These bacterial species are relevant in the production of biobased chemicals, enzymes, and proteins for therapeutic use and bioremediation. The obtained results demonstrated that all selected species were able to attach efficiently to the PCL microfibers. Also, the ability of pure cultures of S. fuliginis (former Flavobacterium sp. ATCC 27551, a very relevant strain in the bioremediation of organophosphorus compounds) to form dense biofilms was observed for the first time, opening the possibility of new applications for this microorganism. This material showed to have a high microbial loading capacity, regardless of the mesh density and fiber diameter. A comparative analysis between PCL and polylactic acid (PLA) electrospun microfibers indicated that both surfaces have a similar bacterial loading capacity, but the former material showed higher resistance to microbial degradation than PLA.

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Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

Cited by 37 publications

References 36 publications

Evaluation of contact time and fiber morphology on bacterial immobilization for development of novel surfactant degrading nanofibrous webs

Evaluation of contact time and fiber morphology on bacterial immobilization for development of novel surfactant degrading nanofibrous webs

Encapsulation of living bacteria in electrospun cyclodextrin ultrathin fibers for bioremediation of heavy metals and reactive dye from wastewater

Analysis of Polycaprolactone Microfibers as Biofilm Carriers for Biotechnologically Relevant Bacteria

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