Biosorption and biodegradation of BDE-47 by Pseudomonas stutzier. (March 2016)

• Record Type: Journal Article
• Authors: Sun, Shiying; Zhang, Zhen; Chen, Yuancai; Hu, Yongyou
• Is Part Of: International biodeterioration & biodegradation. Volume 108(2016)
• Page Start: 16
• Page End: 23
• Publication Date: 2016-03
• Subjects: Biosorption -- Biodegradation -- 2, 2, 4, 4-Tetrabromodiphenyl ether (BDE-47) -- Hydrophobicity -- Rhamnolipids; Biodegradation -- Periodicals; Bioremediation -- Periodicals; Biodegradation -- Periodicals; Biodégradation -- Périodiques; Biorestauration -- Périodiques; Electronic journals; 620.11223
• DOI: 10.1016/j.ibiod.2015.11.005
• Languages: English
• ISSNs: 0964-8305

Abstract

Abstract: The biosorption and biodegradation in the removal process of 2, 2, 4, 4-tetrabromodiphenyl ether (BDE-47) by Pseudomonas stutzier KS0013 ( Ps ) were investigated to elucidate the bio-dissipation mechanism with the influences of glucose and rhamnolipids. The sorption capacity of live Ps (1.163 mg g −1 ) was significantly larger than that of heat-killed Ps (0.845 mg g −1 ), indicating biosorption of BDE-47 was metabolically mediated. The BDE-47 was rapidly adsorbed by Ps at the initial stage, and degradation was observed only after 4 h. Based on the Kp values, the BDE-47 was more likely to dissolve in water rather than adsorb on the Ps . Furthermore, cell surface hydrophobicity of Ps was significantly enhanced with additional rhamnolipids. Meanwhile, rhamnolipids was adsorbed on BDE-47 binding sites and subsequently blocked BDE-47 biosorption, therefore posed an adverse effect on biodegradation. Highlights: Relationship between biosorption and biodegradation of BDE-47 by Ps was evaluated. Biodegradation of BDE-47 under the influences of glucose and rhamnolipids were studied. Based on a comparison of Kp values, the removal process of BDE-47 was discussed. The influence of rhamnolipids were analyzed through the bio-removal of BDE-47 and the cell surface hydrophobicity of Ps .