LIANGJian-jun,HUChun-yan,CHENShu-li,et al.Performance of Molecularly Imprinted Modified MIL100(Fe) for Bisphenol S Removal[J].China Water & Wastewater,2024,40(21):87-94.
分子印迹改性MIL100(Fe)去除双酚S的性能研究
- Title:
- Performance of Molecularly Imprinted Modified MIL100(Fe) for Bisphenol S Removal
- 关键词:
- 双酚S; 吸附; 分子印迹; MIL100(Fe)
- Keywords:
- bisphenol S; adsorption; molecular imprinting; MIL100(Fe)
- 摘要:
- 通过分子印迹改性MIL100（Fe）制得材料BPS-MIP@MIL，以便选择性地去除水中双酚S（BPS）。采用扫描电子显微镜（SEM）、X射线衍射仪（XRD）和傅里叶红外光谱仪（FTIR）对BPS-MIP@MIL进行表征，并考察了吸附剂投加量、BPS初始浓度、接触时间、溶液pH和环境温度对其吸附BPS的影响。结果表明，当吸附剂投加量为0.875 mg/mL、BPS初始浓度为10 mg/L、接触时间为10 min、溶液pH为6和环境温度为15 ℃时，BPS-MIP@MIL对BPS的平均去除率可达90.60%，吸附量可达10.35 mg/g，选择吸附和循环利用性能良好。该吸附过程更符合准二级动力学模型和Freundlich等温线模型，属于自发放热过程。BPS-MIP@MIL通过与双酚S结构匹配的印迹空腔对其产生选择吸附性，氢键的形成有助于增强印迹位点的官能团识别作用。
- Abstract:
- The BPS-MIP@MIL material was prepared by molecular imprinting modification of MIL100(Fe) to selectively remove bisphenol S (BPS) from water. The BPS-MIP@MIL was characterized through scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The influences of adsorbent dosage, initial concentration of BPS, contact time, pH of the solution, and ambient temperature on the adsorption of BPS were examined. When the dosage of the adsorbent was 0.875 mg/mL, the initial concentration of BPS was 10 mg/L, the contact time was 10 min, the pH of the solution was 6, and the ambient temperature was 15 ℃, the average BPS removal efficiency and adsorption capacity of BPS-MIP@MIL reached 90.60% and 10.35 mg/g, respectively, suggesting excellent adsorption and recycling performance. The adsorption process was more in line with the pseudo-second-order kinetic model and Freundlich isotherm model, and it belonged to the spontaneous exothermic process. The selective adsorption of BPS on BPS-MIP@MIL was attributed to the imprinted cavity matching the structure of BPS, and the formation of hydrogen bonds contributed to enhancing the functional group recognition of the imprinted site.
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