Adsorption Ability Of Magnetic Carbon Nanotubes Composite Materials For Metal Ions And Phenol

With the development of modernization construction in China, in many parts of the environment and water appeared different degree of pollution, drinking water and industrial water content of metal ions and organic pollutants in significantly increased, the water quality security seriously affect the healthy development of human beings. Lead and zinc, the nature of metal elements and phenol is common in industrial organic matter, their extensive use has increased the content of metal ions and phenol in water environment.Previous studies have shown that even after treatment of wastewater, the water still contains a small amount of metal ion and phenol organic pollutants, such as its content is less but can not meet the discharge standards, the traditional methods are difficult to clean. In this paper, has the very high specific surface area of carbon nanotubes(MWCNTs) as raw materials, using a magnetic metal oxides and metal ions, and phenol organic pollutants with high adsorption activity of the amine and thiol group modification, the method of preparation of the N2H4-SH-Fe3O4/O-MWCNTs composite material, and studied it for lead ions, zinc ions and phenol adsorption and adsorption mechanism.In this paper, using the hydrothermal method will ferroferric oxide uniform load to the surface of carbon nanotubes, then put the amine and thiol group coated to the surface of the magnetic carbon nanotubes. Ferroferric oxide is obtained by analysis of composite materials characterization of uniform load to the surface of carbon nanotubes, amino and thiol group coated on the surface of the magnetic carbon nanotubes.The lead ions, zinc ions and phenol in water of static adsorption experiment, studies the N2H4-SH-Fe3O4/O-MWCNTs composite material of metal ions and phenol adsorption performance, and studied the pH value, adsorption time, temperature, the influence of the static adsorption process. The results showed that the pH is 6, composite materials for lead ions and zinc ions maximum adsorption capacity can reach 199.6 mg/g and 179.2 mg/g, the maximum number of adsorption of phenol can be up to 56.2 mg/g. I′s still in the pH of 6 cases, study the different adsorption time of lead ions, zinc ions and phenol adsorption capacity, the influence of the experiments show that in the 30 min adsorption equilibrium, equilibrium adsorption quantity respectively is 196 mg/g, 170 mg/g and 37 mg/g. I′s obtained by thermodynamics research, carbon nanotube composite materials for metal ions and phenol adsorption belongs to a spontaneous endothermic process; This research also studied the kinetics of adsorption process, the results show that carbon nanotubes composite materials for metal ions and phenol adsorption conforms to the secondary kinetic rate equation; According to adsorption isotherm adsorption process in accordance with the Freundlich model, adsorption belongs to successive multilayer adsorption;Through the overflow and regeneration experiments, it shows that composite material has good stability and reutilization. Overall research results show that the N2H4-SH-Fe3O4/O-MWCNTs composite material for metal ions and phenol has good adsorption effect, compared with the traditional adsorbent, has a high remove rate, can effectively remove the trace metal ions in the water and phenol and other organic matter, this study for dealing with the trace harmful substances in the water provides a good method.