Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou, 350116, China.
Key Laboratory of National Forestry & Grassland Bureau for Plant Fiber Functional Materials, College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China.
J Hazard Mater. 2021 Feb 5;403:123666. doi: 10.1016/j.jhazmat.2020.123666. Epub 2020 Aug 14.
A porous β-cyclodextrin modified cellulose nano-fiber membrane (CA-P-CDP) was fabricated and employed to treat the trace bisphenol pollutants (bisphenol A (BPA), bisphenol S (BPS), and bisphenol F (BPF)) in water. The characterization highlighted the porous structure, stable crystal structure, good thermal stability of the obtained CA-P-CDP, as well as abundant functional groups, which could greatly improve the adsorption of bisphenol pollutants and recovery. During the static adsorption process, the adsorbents dosage, temperature and pH showed significant influence on the adsorption performance. At the selected conditions (25 °C, 7.0 of pH and 0.1 g L of CA-P-CDP dosage), the BPA/BPS/BPF adsorption on CA-P-CDP could rapidly reached the equilibrium in 15 min by following the pseudo-second-order kinetic model, and the maximum adsorption capacities were 50.37, 48.52 and 47.25 mg g, respectively, according to Liu isotherm model. The mechanisms between the bisphenol pollutants and CA-P-CDP mainly involved the synergism of hydrophobic effects, hydrogen-bonding interactions and π-π stacking interactions. Besides, the dynamic adsorption data showed that the volume of treated water for CA-P-CDP (0.58 L) was 14.5 times larger than that of pristine cellulose membrane (0.04 L), revealing satisfactory adsorption performance of trace BPA in water. Furthermore, during the treatment of real water samples (lake water and river water) with trace bisphenol pollutants, the complete removal of the pollutants were evidently observed, which strongly verified the possibility of CA-P-CDP for the practical application.
一种多孔β-环糊精修饰的纤维素纳米纤维膜（CA-P-CDP）被制备并用于处理水中痕量双酚污染物（双酚 A（BPA）、双酚 S（BPS）和双酚 F（BPF））。该特性突出了所获得的 CA-P-CDP 的多孔结构、稳定的晶体结构、良好的热稳定性以及丰富的功能基团，这极大地提高了双酚污染物的吸附和回收性能。在静态吸附过程中，吸附剂用量、温度和 pH 对吸附性能有显著影响。在选定的条件（25°C，pH 值为 7.0 和 CA-P-CDP 用量为 0.1 g·L）下，BPA/BPS/BPF 在 CA-P-CDP 上的吸附可在 15 min 内迅速达到平衡，符合准二级动力学模型，最大吸附容量分别为 50.37、48.52 和 47.25 mg·g。根据 Liu 等温线模型，双酚污染物与 CA-P-CDP 之间的相互作用机制主要涉及疏水作用、氢键相互作用和π-π堆积相互作用的协同作用。此外，动态吸附数据表明，CA-P-CDP（0.58 L）处理水的体积是原纤维素膜（0.04 L）的 14.5 倍，表明 CA-P-CDP 在水中对痕量 BPA 具有良好的吸附性能。此外，在处理实际水样（湖水和河水）中的痕量双酚污染物时，明显观察到污染物的完全去除，这有力地验证了 CA-P-CDP 用于实际应用的可能性。
