【作者】 郑典模； 许婷； 潘鹤政； 兰倩倩； 温爱鹏；

【Author】 Zheng Dianmo;Xu Ting;Pan Hezheng;Lan Qianqian;Wen Aipeng;School of Resources and Environment and Chemical Engineering,Nanchang University;Jiangxi Hengxingyuan Chemical Co.,Ltd.;

【机构】 南昌大学资源环境与化工学院； 江西恒兴源化工有限公司；

【摘要】 探讨制备活性硅胶,并与氯丙基三氯硅烷改性得氯丙基三氯硅烷改性硅胶（CP-硅胶）,后再用硫氢化钠进行巯基化得到巯基改性硅胶（SH-硅胶）。实验发现CP-硅胶、SH-硅胶总有机碳含量分别为8.98%（wt,质量分数,下同）、7.03%,SH-硅胶含硫量为4.99%,巯基转化率约80%。由SH-硅胶对硝酸汞(Hg²⁺)吸附实验发现,SH-硅胶吸附平衡需12 h,对Hg²⁺的去除率达到95%以上,饱和吸附量为230 mg/g。吸附平衡时间随Hg²⁺浓度增大而变长,溶液pH值越高（pH≤7）,对Hg²⁺去除率愈高。更多还原

【Abstract】 Discussed the preparation of active silica gel,and then reacted with chloropropyl trichlorosilane to get chloropropthylpropyl trichlorosilane modified silica gel（CP-silica gel）.Then reacted with NaHS to get sul fur-hydrogenmodified silica gel（SH-sil ica gel）.It was showed that the TOC contents of CP-silica gel and SHsilica gel were 8.98%,7.03%,repectively,the sul fur content of SH-silica gel was 4.99%.The conversion rate of sul fur was about 80%.It was found that the adsorption of mercury nitrate by SH-sil ica gel reached the adsorption equil ibrium after 12 hours,and Hg²⁺ adsorption efficiency can above 95%,the saturated adsorption capacity was 230mg/g.Increased mercury nitrate concentration and adsorption equil ibrium time became longer.Mercury nitrate solution concentration was higher,the higher the pHvalue（pH≤7）of solution,the higher the Hg²⁺ removal rate.更多还原