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LMWOAs对溶解态菲和甲基菲生物降解过程的影响研究
发表时间：2017-09-30 浏览量：1851 下载量：302
| 全部作者： | 杜兰，朱亚先，张勇 |
| 作者单位： | 厦门大学环境与生态学院近海海洋环境科学国家重点实验室；厦门大学化学化工学院 |
| 摘 要： | 利用同步荧光法研究小分子量有机酸（low molecular weight organic acids，LMWOAs）——草酸（Oxalic acid）、柠檬酸（Citric acid）和酒石酸（Tartaric acid）对新鞘氨醇杆菌US6-1降解溶解态菲（phenanthrene，Phe）、3-甲基菲（3-methylphenanthrene，3-MPhe）和9-甲基菲（3-methylphenanthrene，9-MPhe）的影响。结果表明，当上述LMWOAs浓度为0.2 mmol/L时，均促进US6-1对Phe的降解，但Oxalic acid抑制了3-MPhe及9-MPhe的降解，Citric acid和Tartaric acid则表现为促进作用。2.0 mmol/L的Oxalic acid促进了Phe、3-MPhe及9-MPhe的降解，而2.0 mmol/L的Tartaric acid抑制了上述多环芳烃（polycyclic aromatic hydrocarbon，PAHs）的降解。两种浓度条件下的LMWOAs中，Oxalic acid均能使US6-1表面疏水性提高。双因素方差分析结果表明，LMWOAs的种类、浓度及二者之间的交互作用在Phe及3-MPhe的降解过程中起主要作用（P＞0.05）。 |
| 关 键 词： | 环境化学；生物降解；小分子量有机酸；菲；甲基菲；疏水性 |
| Title： | Influences of LMWOAs on the biodegradation of dissolved phenanthrene and methylphenanthrene |
| Author： | DU Lan, ZHU Yaxian, ZHANG Yong |
| Organization： | State Key Laboratory of Marine Environmental Science of China, College of the Environment and Ecology, Xiamen University; College of Chemistry and Chemical Engineering, Xiamen University |
| Abstract： | Influences of low molecular weight organic acids (LMWOAs): Oxalic acid, Citric acid and Tartaric acid on the biodegradation of dissolved phenanthrene (Phe), 3-methylphenanthrene (3-MPhe) and 9-methylphenanthrene (9-MPhe) by bacterium Novosphing pentaromativorans US6-1 were individually studied using synchronous fluorescence. Results showed that 0.2 mmol/L LMWOAs promoted the biodegradation of Phe. 0.2 mmol/L Oxalic acid inhibited the biodegradation of 3-MPhe and 9-MPhe, while 0.2 mmol/L Tartaric acid or Citric acid promoted these processes. The 2.0 mmol/L Oxalic acid promoted the degradation of the 3 kinds of polycyclic aromatic hydrocarbon (PAHs), but 2.0 mmol/L Tartaric acid inhibited these processes. Oxalic acid of two concentrations, i.e. 0.2 mmol/L and 2.0 mmol/L improved the cell surface hydrophobicity of US6-1. For Phe and 3-MPhe, the results of two-factor variance analysis showed that the types, concentration of LMWOAs and the interaction of these 2 factors played the main roles during the biodegradation processes of Phe and 3-MPhe (P＞0.05). |
| Key words： | environmental chemistry; biodegradation;LMWOAs; Phe; MPhe; surface hydrophobicity |
| 发表期数： | 2017年9月第18期 |
| 引用格式： | 杜兰，朱亚先，张勇. LMWOAs对溶解态菲和甲基菲生物降解过程的影响研究[J]. 中国科技论文在线精品论文，2017，10（18）：2020-2026. |
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