Ding Chuyuan, He Jun, Xu Mengxia, Wang Chengjun
College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China E-mail:
Natural Resources and Environment Research Group, Department of Chemical and Environmental Engineering, The University of Nottingham Ningbo China, Ningbo 315100, China.
Water Sci Technol. 2018 Oct;78(5-6):1001-1009. doi: 10.2166/wst.2018.257.
In this work, the novel β-cyclodextrin modified mesostructured silica coated multi-walled carbon nanotubes (MWCNTs) composites were synthesized and applied for the removal of parabens in aqueous solution. The prepared MWCNTs/SiO/β-CD composites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and thermogravimetric analysis. The effects of the amount of adsorbent, pH and elution solvents on the removal efficiency of parabens from water solutions were investigated. Under the optimized conditions, over 95% removal efficiency was achieved by using 40 mg of MWCNTs/SiO/β-CD adsorbents to absorb the parabens from 60 mL of 0.5 μg/mL parabens solutions. The solution pH in the range from 5 to 9 has no influence on the removal efficiency and the parabens sorption capacity of the prepared adsorbents were around 0.75 μg/mg. Furthermore, the stability and reusability studies demonstrated that the prepared MWCNTs/SiO/β-CD composites are cost-effective adsorbents for the removal of parabens from water with high regeneration efficiency. The composites fabricated in this study could become an attractive candidate for water purification.
在本研究中，合成了新型β-环糊精修饰的介孔二氧化硅包覆多壁碳纳米管（MWCNTs）复合材料，并将其用于去除水溶液中的对羟基苯甲酸酯。通过傅里叶变换红外光谱、X射线衍射、扫描电子显微镜和热重分析对制备的MWCNTs/SiO/β-CD复合材料进行了表征。研究了吸附剂用量、pH值和洗脱溶剂对水溶液中对羟基苯甲酸酯去除效率的影响。在优化条件下，使用40mg的MWCNTs/SiO/β-CD吸附剂从60mL 0.5μg/mL的对羟基苯甲酸酯溶液中吸附对羟基苯甲酸酯，去除效率超过95%。溶液pH值在5至9范围内对去除效率没有影响，制备的吸附剂对对羟基苯甲酸酯的吸附容量约为0.75μg/mg。此外，稳定性和可重复使用性研究表明，制备的MWCNTs/SiO/β-CD复合材料是一种具有成本效益的吸附剂，用于从水中去除对羟基苯甲酸酯，再生效率高。本研究中制备的复合材料有望成为水净化的理想材料。
