Innovative, ecofriendly biosorbent-biodegrading biofilms for bioremediation of oil- contaminated water,New Biotechnology

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Innovative, ecofriendly biosorbent-biodegrading biofilms for bioremediation of oil- contaminated water
New Biotechnology ( IF 4.5 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.nbt.2020.04.001
Valentina Catania ₁ , Francesco Lopresti ₂ , Simone Cappello ₃ , Roberto Scaffaro ₂ , Paola Quatrini ₁

Affiliation

Immobilization of microorganisms capable of degrading specific contaminants significantly promotes bioremediation processes. In this study, innovative and ecofriendly biosorbent-biodegrading biofilms have been developed in order to remediate oil-contaminated water. This was achieved by immobilizing hydrocarbon-degrading gammaproteobacteria and actinobacteria on biodegradable oil-adsorbing carriers, based on polylactic acid and polycaprolactone electrospun membranes. High capacities for adhesion and proliferation of bacterial cells were observed by scanning electron microscopy. The bioremediation efficiency of the systems, tested on crude oil and quantified by gas chromatography, showed that immobilization increased hydrocarbon biodegradation by up to 23 % compared with free living bacteria. The resulting biosorbent biodegrading biofilms simultaneously adsorbed 100 % of spilled oil and biodegraded more than 66 % over 10 days, with limited environmental dispersion of cells. Biofilm-mediated bioremediation, using eco-friendly supports, is a low-cost, low-impact, versatile tool for bioremediation of aquatic systems.

中文翻译：

用于油污染水生物修复的创新、环保的生物吸附剂生物降解生物膜

能够降解特定污染物的微生物的固定化显着促进了生物修复过程。在这项研究中，开发了创新和生态友好的生物吸附剂生物降解生物膜，以修复受油污染的水。这是通过将碳氢化合物降解 γproteobacteria 和放线菌固定在基于聚乳酸和聚己内酯电纺膜的可生物降解的吸油载体上来实现的。通过扫描电子显微镜观察到细菌细胞的高粘附和增殖能力。该系统的生物修复效率在原油上进行测试并通过气相色谱法进行量化，结果表明与游离的活细菌相比，固定化可将碳氢化合物的生物降解提高多达 23%。由此产生的生物吸附剂生物降解生物膜在 10 天内同时吸附了 100% 的溢油和生物降解超过 66%，细胞在环境中的分散有限。生物膜介导的生物修复使用环保支持，是一种低成本、低影响、多功能的水生系统生物修复工具。

更新日期：2020-09-01

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