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Reusable bacteria immobilized electrospun nanofibrous webs for decolorization of methylene blue dye in wastewater treatment

机译：可重复使用的固定化静电纺丝纳米纤维网的细菌，用于废水处理中亚甲基蓝染料的脱色

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摘要

In our study, an electrospun cellulose acetate nanofibrous web (CA-NFW) was found to be quite effective in immobilizing bacterial cells. Here, decolorization of methylene blue (MB) dye in aqueous medium was achieved by using three types of bacteria (Aeromonas eucrenophila, Clavibacter michiganensis and Pseudomonas aeruginosa) immobilized on the CA-NFW. The decolorization time (0-48 h) and different MB dye concentrations (20-500 mg L-1) were studied to elucidate the maximum MB dye removal by the bacteria immobilized CA-NFWs. The effective dye decolorization was achieved within 24 hours and MB dye removal was ∼95%. Interestingly, MB dye decolorization performance of bacteria immobilized CA-NFWs was quite close to that of free bacteria. We have also tested the reusability of bacteria immobilized NFWs after four cycles and ∼45% of the dye decolorization capacity was obtained at the end of the 4th cycle. These results are quite promising and therefore suggest that bacteria immobilized electrospun NFWs could be quite applicable for the decolorization of dyes in wastewater due to their versatility and reusability. © the Partner Organisations 2014.
机译：在我们的研究中，发现静电纺丝醋酸纤维素纳米纤维网（CA-NFW）在固定细菌细胞方面非常有效。在此，通过使用固定在CA-NFW上的三种类型的细菌（嗜酸气单胞菌，密闭性棒状杆菌和铜绿假单胞菌）实现水介质中亚甲基蓝（MB）染料的脱色。研究了脱色时间（0-48小时）和不同的MB染料浓度（20-500 mg L-1），以阐明固定化CA-NFW的细菌去除MB染料的最大量。在24小时内可实现有效的染料脱色，MB染料的去除率约为95％。有趣的是，固定化CA-NFW的细菌的MB染料脱色性能与游离细菌相当。我们还测试了四个循环后固定化细菌的NFW的可重复使用性，并且在第四个循环结束时获得了约45％的染料脱色能力。这些结果是非常有希望的，因此，由于其多功能性和可重复使用性，固定化细菌的静电纺丝NFW可以非常适用于废水中染料的脱色。 ©合作伙伴组织2014。

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