氨基修饰二氧化硅对Cr^3+和直接桃红B12的吸附  

Effect of Amino Modified Silica on Adsorption of Cr 3+and Direct Pink B12

作　　者：李琼[1] 胡育[1] 宋连香[1] 刘素君[1] 王应红[1] LI Qiong;HU Yu;SONG Lian-xiang;LIU Su-jun;WANG Ying-hong(College of Chemistry,Leshan Normal University,Leshan 614000,China)

机构地区：[1]乐山师范学院化学学院,四川乐山614000

出　　处：《中国沼气》2020年第1期49-52,共4页China Biogas

基　　金：四川省科技厅重点研发项目(2017GZ0136);四川省教育厅项目(17ZA197)。

摘　　要：该试验以硅烷偶联剂KH-550为改性剂,乙醇为溶剂合成氨基二氧化硅。利用红外光谱、扫描电镜、原子吸收光谱、可见分光光度法对改性前后SiO 2进行表征,研究其对铬离子及染料直接桃红B12的吸附情况。结果表明:25℃恒温振荡20 min,改性SiO 2吸附重金属离子Cr^3+效果明显,当其用量为0.04 g时,吸附率达99.01%,而相同条件下未改性SiO 2对Cr^3+吸附率只有25.13%;将其用于染料直接桃红B12的吸附,改性后SiO 2吸附率达91.97%,相同条件下未改性SiO 2的吸附率仅为34.23%。Amino silica was synthesized with silane coupling agent KH-550 as modifier and ethanol as solvent.The SiO 2 modified before and after were characterized by infrared spectroscopy,scanning electron microscopy,atomic absorption spectroscopy and visible spectrophotometry,and its adsorption properties to Cr^3+and direct pink B12 were studied.The results showed that the adsorption properties of Cr 3+and direct pink B12 were significantly improved.The adsorption rate of Cr^3+on amino silica reached 99.01%after 20 min of oscillation at 25℃,which was only 25.13%before modification.The adsorption rate of direct pink B12 on amino silica was reached 91.97%,which was only 34.23%before modification.

关 键 词：二氧化硅 KH-550 重金属Cr 3+ 直接桃红 吸附 

分 类 号：O611.4[理学—无机化学]