College of Material Science and Art Design, Laboratory of Fibrosis and Energy Utilisation of Shrubby Resources in Inner Mongolia Autonomous Region, Inner Mongolia Agricultural University, Hohhot, People's Republic of China.
Environ Technol. 2023 Nov;44(25):3777-3790. doi: 10.1080/09593330.2022.2071644. Epub 2022 May 9.
(SPPM) with high adsorption capacity and good cycle adsorption performance was prepared by wet spinning technology. The SPPM was characterised by the scanning electron microscope (SEM), specific surface area test (BET), energy dispersive spectrum (EDS) thermal gravimetric analysis (TGA), fourier transform infrared spectroscopy (FT-IR), and x-ray photoelectron spectroscopy (XPS). The results showed that the surface of SPPM is rough and porous, with good pore structure and thermal stability, and mercury ions (Hg(II)) have been successfully adsorbed on SPPM. At the same time, the effects of adsorption conditions (Hg(II) initial concentration, pH, adsorption time, and temperature) on the adsorption performance of SPPM were studied. Results from the adsorption experiment showed that the adsorption capacity of SPPM for Hg(II) can reach 426 mg/g. After four adsorption and desorption experiments, the adsorption capacity can reach 375 mg/g, which indicates that SPPM has good cycle adsorption performance. The adsorption kinetics was better described by the Pseudo-second-order kinetic, and their adsorption isotherms were fitted for the Langmuir model. The obtained results showed that SPPM is an available, economical adsorbent and was found suitable for removing Hg(II) from an aqueous solution.
采用湿法纺丝技术制备了具有高吸附容量和良好循环吸附性能的 SPPM。通过扫描电子显微镜 (SEM)、比表面积测试 (BET)、能谱 (EDS)、热重分析 (TGA)、傅里叶变换红外光谱 (FT-IR) 和 X 射线光电子能谱 (XPS) 对 SPPM 进行了表征。结果表明，SPPM 的表面粗糙多孔，具有良好的孔结构和热稳定性，汞离子 (Hg(II)) 已成功吸附在 SPPM 上。同时，研究了吸附条件（Hg(II)初始浓度、pH 值、吸附时间和温度）对 SPPM 吸附性能的影响。吸附实验结果表明，SPPM 对 Hg(II)的吸附容量可达 426mg/g。经过四次吸附和解吸实验后，吸附容量可达 375mg/g，表明 SPPM 具有良好的循环吸附性能。吸附动力学较好地符合准二级动力学模型，其吸附等温线拟合 Langmuir 模型。结果表明，SPPM 是一种可用且经济的吸附剂，适用于从水溶液中去除 Hg(II)。
