化工进展 ›› 2023, Vol. 42 ›› Issue (11): 6064-6075.DOI: 10.16085/j.issn.1000-6613.2022-2370

• 资源与环境化工 • 上一篇    

SiO2-CTAB复合材料的制备及其对PNP的吸附性能

田月(), 董晓涵, 苏毅()   

  1. 昆明理工大学化学工程学院,云南 昆明 650500
  • 收稿日期:2022-12-28 修回日期:2023-02-19 出版日期:2023-11-20 发布日期:2023-12-15
  • 通讯作者: 苏毅
  • 作者简介:田月(1996—),女,硕士研究生,研究方向为资源综合利用。E-mail:1561388678@qq.com
  • 基金资助:
    国家自然科学基金(21666015)

Preparation of the SiO2-CTAB composite material and its adsorption properties for PNP

TIAN Yue(), DONG Xiaohan, SU Yi()   

  1. School of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China
  • Received:2022-12-28 Revised:2023-02-19 Online:2023-11-20 Published:2023-12-15
  • Contact: SU Yi

摘要:

以黄磷炉渣为硅源,十六烷基三甲基溴化铵(CTAB)为负载剂,制备二氧化硅基复合吸附剂(SiO2-CTAB)并研究其对废水中对硝基苯酚(PNP)的吸附性能。考察吸附过程中吸附温度、溶液pH、吸附剂投入量、PNP初始浓度和吸附时间对吸附效果的影响;探究吸附过程动力学、热力学及吸附剂再生性能并采用扫描电子显微镜、能量色散光谱仪、X射线光电子能谱、傅里叶变换红外光谱仪等手段对相关物质进行表征。结果表明:在实验研究范围内,最佳吸附条件为温度20℃、pH=6、吸附剂投入量1.5g/L。该条件下,对PNP最大吸附容量为157.2mg/g;对50mg/L的PNP模拟废水去除率可达96.95%。该吸附剂对PNP的吸附过程符合拟二级动力学模型,Langmuir吸附等温线模型能很好地描述该吸附行为。

关键词: 二氧化硅, 十六烷基三甲基溴化铵, 吸附材料, 对硝基苯酚, 黄磷炉渣

Abstract:

Using yellow phosphorus slag as silicon source and cetyltrimethyl ammonium bromide (CTAB) as a supporting agent, the SiO2-based composite adsorbent (SiO2-CTAB) was prepared and its adsorption performance for p-nitrophenol (PNP) in wastewater was studied. Effects of adsorption temperature, solution pH, adsorbent input, initial concentration of PNP and adsorption time on the adsorption performance were investigated. The adsorption kinetics, thermodynamics and adsorbent regeneration properties were analyzed, and the related substances were characterized by SEM, EDS, XPS, FTIR and other means. The results showed that the optimum adsorption conditions were temperature 20℃, pH=6 and the amount of adsorbent 1.5g/L. Under these conditions, the removal rate of 50mg/L PNP simulated wastewater can reach 96.95% and the maximum adsorption capacity of PNP was 157.2mg/g. The adsorption process of PNP by this adsorbent conformed to the pseudo-second-order kinetic model, and the Langmuir adsorption isotherm model can well describe the adsorption process.

Key words: silica, cetyltrimethyl ammonium bromide, adsorption material, p-nitrophenol, yellow phosphorus slag

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn