Environmental pollution reducing strategy for scouring of undegummed sisal fibers using xylanase and pectinase enzymes
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Environmental pollution reducing strategy for scouring of undegummed sisal fibers using xylanase and pectinase enzymes Avtar Singh1,2 · Libin Mathew Varghese1 · Bindu Battan1 · Arun Kumar Patra3 · Rishi Pal Mandhan1 · Ritu Mahajan1 Received: 29 August 2019 / Accepted: 25 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract This study was undertaken to investigate the potential of bioscouring in the processing of undegummed sisal fibers, using xylano-pectinolytic enzymes. Optimum bioscouring was obtained at pH 8.5 and 50 mM buffer molarity, using xylanase (10 IU) and pectinase (8 IU), with a material to liquor proportion of 1:25 (g:ml), EDTA (2 mM) and Tween 80 (0.5%), at 50 °C temperature with agitation rate of 55 rpm and treatment period of 60 min. Enzymatic treatment of sisal fibers enhanced the brightness and whiteness by 11.52 and 6.83%, respectively, and reduced the yellowness by 7.14% in comparison to control. The use of xylanase and pectinase enzymes completely replaced the chemical scouring method for removing noncellulosic impurities. Thus, enzymatic scouring is energy saving and ecofriendly, since it completely eliminated the use of toxic chemicals used in alkaline scouring. An increase of 23.75% and 11.58% in brightness and whiteness of enzymatically scoured cum bleached fibers, as compared to chemically scoured cum bleached fibers was finally obtained, along with reduction in yellowness by 27.99%. This is the first report demonstrating environmentally sustainable enzymatic approach for scouring of undegummed sisal fibers, using enzymes, simultaneously produced from a bacterial isolate. Keywords Alkaline scouring · Bioscouring · Bleaching · Brightness · Whiteness · Yellowness
Introduction The current scenario in the developed and developing nation is progressively becoming environment-conscious and promoting organic based lifestyles. There is a strong inclination towards environmental-friendly, organic textile material option and also the search for more novel plant fibers is on top priority. The increasing awareness about damaging environmental conditions has resulted to the growth of environmentally sustainable and carbon neutral fibers in the everexpanding world of textile fibers. Being environment safe, these materials do not present the problems of poisonous waste disposal, connected with some of the synthetic fibers.
* Ritu Mahajan [email protected] 1
Department of Biotechnology, Kurukshetra University, Kurukshetra, Haryana 136119, India
2
Present Address: Department of Biological Sciences, Indian Institute of Science Education and Research, Mohali, Punjab 140306, India
3
U.P. Textile Technology Institute, Kanpur, India
Sisal (Agave sisalana) has a broad range of conventional applications in textile sector and can also be molded into carpets, mattresses and numerous crafts [19]. Worldwide, sisal fiber production reached 246,900 tons in 2015, of which 91,100 tons were produced by Brazil, as the biggest producing nation.
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