Preparation of Porous Carbon Spheres and Its Adsorption Characteristics of Organic Dyes in Wastewater
Porous carbon spheres were prepared by hydrothermal carbonization with anhy-drous glucose as raw material and used to adsorb methylene blue,rhodamine B and other or-ganic dyes in wastewater.The porous carbon spheres were characterized by specific surface area and pore size analysis,SEM,FT-IR and Zeta potential.The results show that the pre-pared porous carbon spheres are mesoporous materials with various functional groups on the surface.Their tiny size and spherical shape make them have enough mechanical strength to maintain water flow.Their high surface area,negative electric property and low resistance diffusion path of pollutants are beneficial to their adsorption of cationic dyes.Through ad-sorption experiments,it is found that Langmuir isothermal adsorption model and pseudo-second-order kinetic equation could well reflect the adsorption process of methylene blue and rhodamine B by the porous carbon spheres.The theoretical removal capacity of the porous carbon spheres for rhodamine B and methylene blue is 56.793 and 89.378 mg·g-1.The fea-sibility,easy operation,high efficiency and good circulation of this material make it a more promising adsorbent in actual sewage treatment.
NETL
NSTL
万方数据
