【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-SiO₂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Hg²⁺去除效果的影响.并采用TEM、SEM、FTIR、N₂-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-SiO₂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Hg²⁺吸附率可达90%以上.更多还原

【Abstract】 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%.更多还原