Abstract

The purpose of this study was to investigate the mechanism of adsorption reaction between heterocyclic organic compounds with different number of ring atoms and different atoms replacing carbon atoms and carbon nanotubes with different surface functional groups. Based on the current situation of research on adsorption of carbon nanomaterials adsorbing organic pollutants, the existing problems and limitations were analyzed by studying the properties and characterization of single-walled carbon nanotubes, oxidized single-walled carbon nanotubes and non-porous graphite powder, such as elemental analysis, transmission electron micrograph, zero charge point, etc. The three adsorption materials were investigated by batch experiment. Six compounds of thiophene, pyrimidine, benzene, aniline, 2-aminopyrimidine and 4,6-diaminopyrimidine were selected as the adsorbate for detecting adsorption capacity. The results showed that the affinity of different adsorbents on different adsorbents varied greatly. The adsorption capacity of heterocyclic compounds containing N and S was greatly enhanced by non-hydrophobic action. And the degree of oxidation of the adsorbent and the ph of the solution determined the adsorption capacity of the adsorbent for nitrogen-containing heterocyclic compounds. Therefore, in the ecological environment, the migration of hydrophilic organic pollutants in the environment can be reduced by the preparation of appropriate carbon nanotubes.

摘要

本研究的目的是研究具有不同环原子数和不同原子取代碳原子的杂环有机化合物与具有不同表面官能团的碳纳米管之间的吸附反应机理。在研究碳纳米材料吸附有机污染物的研究现状的基础上，通过研究单壁碳纳米管，氧化单壁碳纳米管和无孔石墨粉等的性质和表征，分析了存在的问题和局限性。通过分批实验研究了三种吸附材料。噻吩，嘧啶，苯，苯胺，2-氨基嘧啶和4种化合物 选择6-二氨基嘧啶作为吸附剂以检测吸附能力。结果表明，不同吸附剂对不同吸附剂的亲和力差异很大。非疏水作用极大地提高了含氮和硫杂环化合物的吸附能力。吸附剂的氧化程度和溶液的酸碱度决定了吸附剂对含氮杂环化合物的吸附能力。因此，在生态环境中，可以通过制备适当的碳纳米管来减少亲水性有机污染物在环境中的迁移。非疏水作用极大地提高了含氮和硫杂环化合物的吸附能力。吸附剂的氧化程度和溶液的酸碱度决定了吸附剂对含氮杂环化合物的吸附能力。因此，在生态环境中，可以通过制备适当的碳纳米管来减少亲水性有机污染物在环境中的迁移。非疏水作用极大地提高了含氮和硫杂环化合物的吸附能力。吸附剂的氧化程度和溶液的酸碱度决定了吸附剂对含氮杂环化合物的吸附能力。因此，在生态环境中，可以通过制备适当的碳纳米管来减少亲水性有机污染物在环境中的迁移。