硅烷偶联剂改性硅藻土及其去除水中As(Ⅴ)的研究

硅酸盐通报 ›› 2018, Vol. 37 ›› Issue (4): 1160-1166.

硅烷偶联剂改性硅藻土及其去除水中As(Ⅴ)的研究

李聪;解庆林;陈南春;钟溢健;梁效铭

桂林理工大学环境科学与工程学院,桂林,541004

出版日期:2018-04-15 发布日期:2021-01-18
基金资助:
国家自然科学基金(41662005,51564008)%广西环境污染控制理论与技术重点实验室研究基金(001102216078)%广西科技攻关项目(桂科攻14124004-5-5)

Modified Diatomite with Silane Coupling Agent and As(V)Removal

LI Cong;XIE Qing-lin;CHEN Nan-chun;ZHON Yi-jian;LIANG Xiao-ming

Online:2018-04-15 Published:2021-01-18

摘要/Abstract

摘要： 以硅藻土为基体,γ-氨丙基三甲氧基硅烷(APES)作为改性剂,对硅藻土表面进行修饰,制备了针对As(V)吸附材料.采用单因素试验法,得到改性的最佳条件为:硅藻土为3 g,γ-氨丙基三甲氧基硅烷(APES)为4 mL,pH值为11,反应时间6 h,反应温度为30 ℃,该材料对As(V)的去除率可以达到87.11%.用扫描电镜(SEM)和傅里叶红外光谱仪(FT-IR)对材料进行表征,显示:改性前后的硅藻整体结构不发生变化;硅藻经改性后活性羟基峰消失,表面生成新的-NH2吸收峰.用Freundlich吸附模型能更好的描述吸附行为,吸附过程符合准二级动力学方程.

关键词: γ-氨丙基三甲氧基硅烷;硅藻土;As(V);吸附

Abstract: The adsorbent for As(V)ion removal was prepared by using diatomite as matrix, γ-propylalkoxysilane(APES)as the modifier.The highest removal rate of 87.11% was observed at the optimal modification conditions: modified diatomite 3 g, APES 4 mL, pH =11, reaction time 6 h, reaction temperature 30 ℃.The scanning electron microscopy(SEM)observation showed that the diatomite matrix did not change before and after modification.The Fourier transform infrared spectroscopy (FT-IR)analysis proved the disappearance of hydroxyl group and the appearance of-NH2.Besides,the adsorption of As(V)ions on adsorbent obeys the Freundlich model and the pseudo second-order equation.

Key words: γ-propylalkoxysilane;diatomite;As(V);adsorption

中图分类号:

X505

李聪;解庆林;陈南春;钟溢健;梁效铭. 硅烷偶联剂改性硅藻土及其去除水中As(Ⅴ)的研究[J]. 硅酸盐通报, 2018, 37(4): 1160-1166.

LI Cong;XIE Qing-lin;CHEN Nan-chun;ZHON Yi-jian;LIANG Xiao-ming. Modified Diatomite with Silane Coupling Agent and As(V)Removal[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2018, 37(4): 1160-1166.