3-氨基丙基三乙氧基硅烷(3-APTES)改性粘土岩的制备及其对铀U(Ⅵ)的吸附  

Preparation of 3-APTES modified clay rock and its adsorption for U(Ⅵ)

作　　者：阳刚 潘跃龙 刘羽 冷阳春[3] 王彦惠 李东瑞 YANG Gang;PAN Yuelong;LIU Yu;LENG Yangchun;WANG Yanhui;LI Dongrui(Chengdu University of Technology,Chengdu,610059,China;China Nuclear Power Engineering Co.,Ltd,Shenzhen,518000,China;Southwest University of Science and Technology,Mianyang,621010,China)

机构地区：[1]成都理工大学,成都610059 [2]中广核工程有限公司,深圳518000 [3]西南科技大学,绵阳621010

出　　处：《环境化学》2021年第11期3590-3597,共8页Environmental Chemistry

基　　金：国家自然科学基金(41630646)资助。

摘　　要：本文用3-氨基丙基三乙氧基硅烷(3-APTES)改性粘土岩,并通过X射线荧光光谱分析(XRF)、红外光谱仪(FT-IR)和扫描电子显微镜(SEM)对其进行了表征.结果显示,3-APTES改性粘土岩没有固定的表面结构,多为呈不规则多边型的薄片状晶体.以3-APTES改性粘土岩为吸附介质,探讨了反应时间、初始浓度、水相pH值、固液比、实验温度和离子种类等对该材料吸附U(Ⅵ)的影响.实验结果表明,pH为5、U(Ⅵ)初始浓度为50μg·mL^(-1)、固液比为1:200时,经过120 min 3-APTES改性粘土岩对U(Ⅵ)的吸附达到平衡,吸附效果最佳.升温有助于提高其吸附性能;溶液中Ca^(2+)、HCO_(3)^(-)、CO_(3)^(2-)等3种离子极大的抑制了3-APTES改性粘土岩的吸附性能.3-aminopropyltriethoxysilane(3-APTES)modified clay rock was characterized by X-ray fluorescence spectrometry(XRF),infrared spectrometer(FT-IR)and scanning electron microscope(SEM).The characterization results showed that 3-APTES modified clay rock had no fixed surface structure and was mostly lamellar crystal with irregular polygonal shape.Using 3-APTES modified clay rock as the adsorption medium,the effect of reaction time,initial concentration,aqueous phase pH value,solid-liquid ratio,experimental temperature and ionic species on absorption of U(Ⅵ)were explored.The experimental results showed that when the pH was 5,the initial concentration of U(Ⅵ)was 50μg·mL^(-1),and the solid-liquid ratio was 1:200,the adsorption of U(Ⅵ)on the 3-APTES modified clay rock reached equilibrium after 120 minutes.The adsorption effect was the best.Warming helps to improve its adsorption performance;Ca^(2+),HCO_(3)^(-) and CO_(3)^(2-) ions in the solution greatly inhibited the adsorption performance of 3-APTES modified clay rock.

关 键 词：3-氨基丙基三乙氧基硅烷(3-APTES) 改性 粘土岩 吸附 U(Ⅵ) 

分 类 号：TQ424[化学工程] X771[环境科学与工程—环境工程]