摘要
采用胶晶模板法,以正硅酸乙酯为硅源,以聚苯乙烯(PS)为模板剂,以三甲氧基硅烷为巯基功能化接枝剂,制备了多级孔结构的巯基功能化SH-SiO_2材料.以此为吸附剂探究了间歇式动态吸附条件下吸附剂用量、吸附时间及pH值对水中Hg^(2+)去除效果的影响.并采用TEM、SEM、FTIR、N_2-物理吸附、压汞及ED对材料进行结构和组份分析表征.结果表明,所制备的多级孔SH-SiO_2空间形貌呈有序的大孔(～200 nm)、介孔(3～20 nm)及微孔(<5 nm)多级孔结构.间歇式动态吸附方式表明,当吸附剂中S含量为8.52%,用量为10mg,吸附时间为70min,溶液的pH值为7.5～8时,水中Hg^(2+)吸附率可达90%以上.
The thiol function of multi-stage pore structure was prepared by using the colloidal template method,using tetraethyl orthosilicate as the silicon source,polystyrene(PS)as the template and trimethoxysilane as the thiol functional grafting agent.The SH-SiO2 material was used as the adsorbent to investigate the effect of adsorbent dosage,adsorption time and p H on the removal of Hg2+ in water under intermittent dynamic adsorption conditions.The structure and composition of the materials were characterized by TEM,SEM,FTIR,N2-physical adsorption,mercury intrusion and ED.The results show that the spatial morphology of the prepared multi-stage pore SH-SiO2 is ordered by several pores(~200 nm),mesopores(3~20 nm)and micropores(<5 nm).Intermittent dynamic adsorption mode when the S content in the adsorbent is 8.52%,the dosage is 10 mg,the adsorption time is70 min,and the pH of the solution is 7.5~8,the adsorption rate of Hg2+ in water can reach over 90%.
作者
张钰
姜惠烨
张楠
王倩
田景芝
ZHANG Yu;JIANG Hui-ye;ZHANG Nan;WANG Qian;TIAN Jing-zhi(School of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China)
出处
《高师理科学刊》
2019年第3期57-63,共7页
Journal of Science of Teachers＇College and University
基金
齐齐哈尔大学大学生创新创业项目(201810232070)
