| 硅烷偶联剂改性硅藻土及其去除水中As(Ⅴ)的研究 |
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| 引用本文： | 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. |
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| 作者姓名： | 李聪 解庆林 陈南春 钟溢健 梁效铭 |
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| 作者单位： | 桂林理工大学环境科学与工程学院,桂林,541004 |
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| 基金项目： | 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) |
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| 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.
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| 关 键 词： | γ-氨丙基三甲氧基硅烷 硅藻土 As(V) 吸附 |
Modified Diatomite with Silane Coupling Agent and As(V)Removal |
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| 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. |
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| Authors: | LI Cong XIE Qing-lin CHEN Nan-chun ZHON Yi-jian LIANG Xiao-ming |
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| 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. |
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| Keywords: | γ-propylalkoxysilane diatomite As(V) adsorption |
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