吡啶缺氧生物降解特性及其降解产物

发布时间：2018-04-17 05:21

本文选题：吡啶 + 缺氧　；参考：《环境工程学报》2016年12期

【摘要】：吡啶是焦化废水中较为典型的含氮杂环化合物,难以被生物降解。通过研究吡啶的缺氧生物降解特性,并对其降解产物进行鉴定,以期为实际生产提供理论依据和为今后进一步研究做出铺垫。结果表明,吡啶在本实验条件下的最佳降解浓度为80 mg·L~(-1),对于后期测定降解中间产物,该浓度和其降解周期均较为合适;戊二醛为吡啶在缺氧反硝化降解过程中的一个重要中间产物,其浓度在反应进行32 h时积累达到最大值。在上述实验基础上,在底物中加入40 mg·L~(-1)苯酚,其对吡啶的降解产生抑制作用,戊二醛浓度最大值出现在反应进行40 h处,由此推断苯酚对吡啶降解的抑制作用可能产生于吡啶开环脱氮阶段。
[Abstract]:Pyridine is a typical nitrogen-containing heterocyclic compound in coking wastewater, which is difficult to biodegrade.The characteristics of anoxic biodegradation of pyridine were studied and its degradation products were identified in order to provide theoretical basis for practical production and pave the way for further research.The results showed that the optimum degradation concentration of pyridine was 80 mg / L ~ (-1), which was suitable for the later determination of the intermediate product.Glutaraldehyde is an important intermediate product of pyridine in the process of anoxic denitrification and the concentration of glutaraldehyde accumulates to a maximum at 32 h.On the basis of the above experiments, the degradation of pyridine was inhibited by adding 40 mg / L of phenol to the substrate, and the maximum concentration of glutaraldehyde appeared at the reaction time of 40 h.It is concluded that the inhibition of phenol on the degradation of pyridine may occur at the stage of denitrification of pyridine.
【作者单位】：太原理工大学环境科学与工程学院;
【基金】：国家自然科学基金资助项目(51408396,51378330) 山西省高等学校科技创新项目(2016146) 山西省回国留学人员科研资助项目(2016-034)
【分类号】：X784

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