Li Najun, Jiang Jun, Chen Dongyun, Xu Qingfeng, Li Hua, Lu Jianmei
State Key Laboratory of Treatments and Recycling for Organic Effluents by Adsorption in Petroleum and Chemical Industry, College of Chemistry, Chemical Engineering and Materials Science, Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou. 215123, China.
Sci Rep. 2015 Mar 3;5:8628. doi: 10.1038/srep08628.
Bacteria-mediated degradation of toxins has been reported as a practical technique for the innocuous removal of toxic organic compounds from water. Specifically, immobilized and pre-acclimatized Pseudomonas putida has been shown to clear low levels of contaminants (less than 2000 mg/L) from wastewater, wherein the bacteria consumes toxic aromatic compounds as the only source of carbon and energy. Here we report the preparation of a high-capacity composite adsorbent as an immobilization matrix for pre-acclimatized P. putida that is capable of complete degradation of 5000 mg/L of phenol within 80 hours. The composite adsorbent, a n-Butyl acrylate (BA)-resin evenly coated on polyester fiber (PF), can quickly reduce the phenol concentration to a level that is suitable for the immobilized bacteria to start the biodegradation process. Furthermore, the composite adsorbent (PF-BA) is regenerated during the biodegradation process without any additional manipulations, therefore it is reusable. As a whole, we provide a general strategy for more efficient biodegradation for phenol, which can be generalized to other water-soluble toxic organics removal for waste water treatment.
细菌介导的毒素降解已被报道为一种从水中无害去除有毒有机化合物的实用技术。具体而言，固定化且预先驯化的恶臭假单胞菌已被证明能够从废水中清除低水平的污染物（低于2000毫克/升），其中细菌将有毒芳香化合物作为唯一的碳和能量来源。在此，我们报告了一种高容量复合吸附剂的制备，作为预先驯化的恶臭假单胞菌的固定化基质，该基质能够在80小时内完全降解5000毫克/升的苯酚。这种复合吸附剂是一种均匀涂覆在聚酯纤维（PF）上的丙烯酸正丁酯（BA）树脂，它能迅速将苯酚浓度降低到适合固定化细菌启动生物降解过程的水平。此外，复合吸附剂（PF-BA）在生物降解过程中无需任何额外操作即可再生，因此可重复使用。总体而言，我们提供了一种更高效降解苯酚的通用策略，该策略可推广到其他用于废水处理的水溶性有毒有机物的去除。
