YU Rongtai ¹, LIIU Jiancong ¹, MA Xiang ¹, XIE Zhipeng ², WANG Chang'an ²

(1. School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China; 2. School of

Materials Science and Engineering, Tsinghua University, Beijing 100084, China)

Abstract: Using glucose as a carbon source, hollow magnetic carbon microspheres were synthesized by hydrothermal method using magnetic assembly, cavity-plate was provided by ammonia with soft template, sodium dodecylbenzene sulfonate was used as an active agent;the adsorption efficiency of Pb²⁺ and Cd²⁺ ions were investigated. The results showed that the adsorption rate of Pb(OH)+and Pb(OH)₂ was higher than that of Pb²⁺ ions by hollow magnetic carbon microspheres; however, the adsorption rate of Cd²⁺ ions has nonlinear correlation with pH. When the dosage was 0.25 g/L, the removal rates of Pb²⁺ and Cd²⁺ ions were about 95% and 88.5%, respectively. The adsorption rates of Pb²⁺ and Cd²⁺ ions were not related to the dosage of magnetic fluid and the foaming agent of ammonia, but they had a weak positive correlation with the active agent.

Key words: carbon microspheres; magnetic fluid; hollow; heavy metal; adsorption