硝基酚类物质生物电化学还原规律研究
关键词 硝基酚 生物电化学 还原
毕业设计说明书（论文）外文摘要
Title Research on the Regulation of Bioelectroehemical Reduction of Nitrophenols
Abstract
Because of its high toxicity, high stability and carcinogenic，nitorphenols caused serious pollution to the environment. The paper aims to optimize the most appropriate reduction conditions of nitorphenols, analysis the reduction pathway of nitorphenols and to evaluate the bioelectrochemistry system by bioelectrochemistry technique. The results indicated that, the most appropriate reduction conditions of 3-NP with initial concentration of 100mg/L were the cathode potential of -700.00mV vs SHE, the hydraulic retention time of 3h. 3-AP was identified as the dominant product of 3-NP reduction at the abiotic graphite cathode of BESs. The maximal coulombic efficiencies for nitrobenzene removal and aniline formation were 44% and 42%. The maximal coulombic efficiency for acetate oxidation at the anode was 45%. The reductant usage ratio for 3-NP removal was 8.68 mol COD mol-1 3-NP removal. The conclusion provided a new way for the treatment of actual wastewater polluted by nitorphenols.
Keywords nitorphenols bioelectrochemistry reduction
目 录
1 引言 2
1.1 硝基酚类物质的定义、来源、危害 2
1.2 硝基酚类物质的难降解性分析 2
1.3 硝基酚类物质的处理方法 2
1.3.1 处理硝基酚类物质的物理法 3
1.3.2 处理硝基酚类物质的化学法 3
1.3.3 处理硝基酚类物质的生物法 6
1.4 应用生物电化学法处理硝基酚类物质 8
1.5 本课题研究的内容和意义 9
1.5.1 研究意义 9
1.5.2 研究内容 10
2 实验材料和方法 11
2.1 实验材料 11
2.1.1 实验所用主要仪器 11
2.1.3 实验所用菌种 12
2.2 实验方法 12
2.2.1实验设计思路 12
2.2.2实验装置 12
2.2.3阳极溶液的配制 13
2.2.4阴极溶液的配制 14
2.2.5 测定COD的实验室方法 14
2.2.6 3-NP和3-AP的检测方法 15
2.2.7 数据处理的相关方法 17
3 实验结果与讨论 19
3.1 硝基酚还原条件的优化 19
3.1.1阴极电位对硝基酚的还原条件优化 19
3.1.2 水力停留时间对硝基酚的还原条件优化 21
3.2 硝基酚还原途径的分析 23
3.2.1 3-NP还原产物的检测 23
3.2.2 3-NP去除率和3-AP生成率变化图的分析 25
3.3 生物电化学体系的评价 26
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