The transformation mechanism of nitrobenzene in the present of a species of cyanobacteria Microcystis aeruginosa.
The transformation mechanism of nitrobenzene in the present of a species of cyanobacteria Microcystis aeruginosa.
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DOI：
10.1016/j.chemosphere.2013.08.083
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发表时间：
2014
期刊：
影响因子：
8.8
通讯作者：
Zhiquan Liu;F. Cui;Hua Ma;Zhenqiang Fan;Zhiwei Zhao;Z. Hou;Dongmei Liu
中科院分区：
文献类型：
--
作者：
Zhiquan Liu;F. Cui;Hua Ma;Zhenqiang Fan;Zhiwei Zhao;Z. Hou;Dongmei Liu
通过一系列实验室规模的实验，研究了微囊藻对硝基苯的转化机理。结果表明，只有一小部分NB能被M吸附。铜绿。吸附是NB转化为M的主要原因。但不是主要原因。细胞活力和光照的变化影响NB与M的转化。aeruginosa，表明M.好氧微生物具有生物降解NB的能力。代谢中间产物分析表明，M.铜绿假单胞菌能将NB还原为苯胺（AN），NB诱导的NB还原酶是还原过程中的关键酶。厌氧微生物不能进一步降解AN，并可能阻止AN的挥发，导致AN在溶液中积累长达3天。在48 h内，只有一小部分AN（小于5%）可被光解为乙醛和丙酮。含氮芳香族化合物的总浓度在72 h内基本不变，然后通过吸附、生物降解、挥发和光解等复杂过程逐渐降低。
The transformation mechanism of nitrobenzene (NB) withMicrocystis aeruginosawas investigated by a series of laboratory-scale experiments. The result showed only a small fraction of NB can be adsorbed byM. aeruginosa. The adsorption was responsible to the transformation of NB inM. aeruginosasolution but was not the primary cause. The variation of cell activity and illumination could affect the transformation of NB withM. aeruginosa, which indicated thatM. aeruginosahave the ability to biodegrade NB. Metabolic intermediate products analysis indicated thatM. aeruginosacan reduce NB to aniline (AN), and NB reductase, induced by NB, was the key enzyme during the reduction process.M. aeruginosacannot further degrade AN and may prevent the volatilization of AN, causing the accumulation of AN in the solution for up to 3 days. Only a small proportion of AN (less than 5%) can be degraded to acetaldehyde and acetone by photolysis in 48 h. The total concentration of nitrogen aromatic compounds is invariant at first, and then decreases after 72 h incubation via a complex process including adsorption, biodegradation, volatilization and photolysis processes.