电助固相微萃取吸附苯酚、硝基苯的研究

范文编号:HG090  范文字数:9697,页数:24

摘要：本范文采用固相微萃取（SPME）—气象色谱法考查利用固相微萃取装置（石英纤维）吸附水中有机污染物（苯酚、硝基苯）的能力，讨论吸附时间、电压以及电解质等不同参数对吸附的影响。实验结果表明，不同取代基的苯衍生物，电吸附改变量也不同。在正极化作用下，石英纤维对苯酚的吸附效果更好。而正负极化对硝基苯的吸附没有很大的影响。在加入硫酸钠电解质后，苯酚、硝基苯的吸附量和吸附效率都有大幅度的增加。因此，利用这种方法，可以降低吸附工艺成本，使吸附处理更加经济有效。
关键词：固相微萃取技术；气象色谱；电解质溶液对吸附的影响

 The equipment of solid phase micro-extraction with voltage was used to absorb the phenol、nitrobenzene

Abstract: In this artical, the equipment of solid phase micro—extraction was used to adsorb the organic contaminants in the water.. And the adsorb time、voltage、electrolyte solution were considered to discuss whether they got the influence to the adsorbtion. According to the results, the adsorbance of the different benzene derivatives were adsorbed differently. The phenol was adsorbed better under positive voltage, but the nitrobenzene didn’t get so much influenced whether under positive voltage or negative voltage. After added the sodium sulphate solution, the phenol and nitrobenzene were adsorbed much better. So, the equipment can be used in the chemical industry to decrease the adsorbtion cost.
Keywords: the technology of solid phase micro—extraction; gas chromatography; the influence of the electrolyte solution

目    录
中文摘要 Ⅰ
英文摘要..Ⅱ
目录..Ⅲ
1. 绪论 .. .1
 1.1水中有机污染物前处理方法的研究1
 1.2固相微萃取技术.2
 1.3固相微萃取技术条件的选择..4
  1.4 固相微萃取技术的应用.5
 1.5国外固相微萃取技术的研究状况.6
 1.6固相微萃取技术的优势7
2. 实验部分.7
 2.1主要试剂、材料、仪器7
 2.2实验方法与步骤.8
3. 结果与讨论.10
 3.1不同电压、吸附时间对石英纤维吸附苯酚的影响10
 3.2.不同电压、吸附时间对石英纤维吸附硝基苯的影响12
 3.3石英纤维对苯酚的吸附实验.13
 3.4石英纤维对硝基苯的吸附实验14
 3.5不同电解质浓度和吸附时间下石英纤维对硝基苯的吸附量15
4. 实验总结16
 4.1实验结论..16
 4.2存在的不足与建议17
致谢.. 18
5. 参考文献19

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