Effects of carbon nanomaterials on the migration and fate of organic pollutants in the ecological environment

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.

Keywords:

• Carbon nanomaterials
• ecological environment
• organic pollution
• absorbent material

Additional information

Funding

This work was supported by the Science and Technology Research Program of Chongqing Municipal Education Commission (No. KJQN201802101, No. KJZD-K201802101); Doctoral high school talent training project (No. BYJS2016003); Chongqing Graduate Scientific Research Innovation Project (No. CYB17131); National Natural Science Foundation of China under grants (No. 71473074); Program for Innovative Research Team of Jilin engineering normal University.