Fabrication of novel nanocomposite nanofibrous matrices retaining high concentration of microbial cells for heavy crude oil biodegradation

eXPRESS Polymer Letters

A. Partovinia¹ 

关键词: polymer composites;    electrospinning;    halloysite nanotubes;    nanocomposites;    reinforcements;   

DOI  :  10.3144/expresspolymlett.2019.40

学科分类：生物科学（综合）

来源: eXPRESS Polymer Letters

【 摘 要 】

Microbial cells immobilized in porous carriers as an effective technique has been recently studied and applied invarious applications including wastewater treatment. High mechanical stability and large specific surface area are the keyadvantages of an ideal porous carrier. Immobilization of microbial cells in novel nanocomposite nanofibrous webs (NCNFWs)for use in bioremediation of heavy crude oil as sole carbon and energy sources in aqueous phase was the main focusof this study. Polyvinyl alcohol (PVA) and alginate (ALG) were selected as the polymer matrices for the electrospinning ofnanofibrous webs (NFWs). In this study, preparation and application of PVA/ALG webs that were reinforced by halloysitenanotubes (HNTs) followed by cross-linking with glyoxal (GO) are described for the first time. The synthesized NFWs werecharacterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), scanning electron microscopy(SEM) and tensile tests. Results showed that NC-NFWs have a great potential for bioremediation of crude oil, andremoval performances were higher in immobilized systems (85 and 64%) compared to freely suspended cell system (48%)after 14 days. Also, maximal bacterial growth in culture containing 500 ppm crude oil was achieved by PVA/ALG/GO/HNT7.5% which was almost 1.4 and 2.4 times higher than PVA/ALG/GO/HNT5% and free cell system at same inoculumconcentration, respectively.

【 授权许可】

CC BY