|本期目录/Table of Contents|

[1]韩璐,叶杰铭,杨玉琼,等.水相单层氨基改性二氧化硅的制备及Pb2+ 吸附效果[J].石化技术与应用,2024,5:324-329.
 HAN Lu,YE Jie-ming,YANG Yu-qiong,et al.Preparation of monolayer amino-modified silica by aqueous phase and effect on adsorption of Pb2+[J].Petrochemical technology & application,2024,5:324-329.
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水相单层氨基改性二氧化硅的制备及Pb2+ 吸附效果(PDF)

《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]

期数:
2024年5期
页码:
324-329
栏目:
出版日期:
2024-09-10

文章信息/Info

Title:
Preparation of monolayer amino-modified silica by aqueous phase and effect on adsorption of Pb2+
文章编号:
1009-0045(2024)05-0324-06
作者:
韩璐1叶杰铭2杨玉琼3王景元3*肖海成3
(1.中国石化燕山石化公司 合成树脂厂,北京 102500;2.中国石化北京化工研究院,北京 100013;3.中国石油石油化工研究院,北京 102206)
Author(s):
HAN Lu1 YE Jie-ming2 YANG Yu-qiong3 WANG Jing-yuan3 XIAO Hai-cheng3
(1.Synthetic Resin Factory of Yanshan Petrochemical Company,SINOPEC,Beijing 102500,China;2.Beijing Research Institute of Chemical Industry,SINOPEC,Beijing 100013,China;3.Petrochemical Research Institute, PetroChina,Beijing 102206,China)
关键词:
二氧化硅硅烷偶联剂氨基改性铅离子(Pb2+)吸附效果
Keywords:
silicasilane coupling agentamino modificationlead ion (Pb2+)adsorption effect
分类号:
TQ 127.2
DOI:
DOI:10.19909/j.cnki.ISSN1009-0045.2024.05.0324
文献标识码:
B
摘要:
采用硅烷偶联剂γ-氨丙基三乙氧硅烷(APTES)和(β-氨乙基)-γ-氨丙基三甲氧基硅烷(AEAPTMS),通过水相工艺分别制备出单层氨基改性二氧化硅(SiO2-APTES和SiO2-AEAPTMS,用作吸附剂),采用透射电子显微镜、红外光谱分析仪、热重-差热分析仪、元素分析仪等仪器对其进行了表征,考察了Pb2+ 吸附效果的影响因素,确定了最佳吸附条件。结果表明:当偶联剂添加量(质量分数)小于15%时,可实现二氧化硅的单层氨基改性;在初始Pb2+质量浓度为200 mg/L,pH值为6,吸附时间为60 min的优化条件下,SiO2-APTES和SiO2-AEAPTMS对Pb2+的最大吸附量分别达到18.48,34.75 mg/g;吸附过程均符合拟二级动力学模型和Langmuir吸附模型,均为单分子层的化学吸附过程;吸附剂重复使用5次后,Pb2+吸附量仍超过最大吸附量的90%,具有良好的循环使用性能。
Abstract:
Monolayer amino-modified silica (SiO2-APTES and SiO2-AEAPTMS, used as adsorbents) was prepared by aqueous phase process by using silane coupling agents γ-aminopropyltriethoxysilane(APTES) and(β-aminoethyl) -γ- aminopropyltrimethoxysilane(AEAPTMS), which was characterized by using transmission electron microscopy, infrared spectroscopy analyzer, thermogravimetric differential thermal analyzer, elemental analyzer, and other instruments. The influence factors of Pb2+ adsorption effect was investigated, and the optimal adsorption conditions were determined. The results showed that when the additive amount of coupling agent(mass fraction) was less than 15%, the monolayer amino modification of silica could be achieved. The maximum adsorption capacity of SiO2-APTES and SiO2-AEAPTMS for Pb2+ reached 18.48,34.75 mg/g, respectively,under the optimized conditions of an initial Pb2+ mass concentration of 200 mg/L, pH value of 6, and adsorption time of 60 min. The adsorption process conforms to the pseudo second-order kinetic model and Langmuir adsorption model, both of which were monolayer chemical adsorption process. The adsorption capacity of Pb2+ still exceeded 90% of the maximum adsorption capacity after the adsorbent repeated for 5 times, indicating the good cyclic performance.

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备注/Memo

备注/Memo:
中国石油重大科技专项资助项目(项目编号:2020 E-2802 GF)
更新日期/Last Update: 2024-09-10