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通过静态吸附实验,研究了聚乙烯吡啶树脂(PVP)对富马酸的吸附性能。结果表明,该树脂对富马酸的吸附等温线同时满足Langmuir和Freundlich等温吸附方程;在无机盐存在下,与大孔强碱性树脂D204、弱碱树脂D308相比,PVP吸附富马酸的性能几乎不受无机盐的影响。D204树脂吸附富马酸是离子交换作用,D308树脂通过Lewis作用和静电作用吸附富马酸,而PVP树脂对富马酸的吸附行为是氢键所致,吸附为放热过程且能够自发进行。
The adsorption of fumaric acid by polyvinyl pyridine resin (PVP) was studied by static adsorption experiments. The results showed that the sorption isotherms of fumaric acid satisfy the Langmuir and Freundlich adsorption isotherms at the same time. Compared with the macroporous strong basic resin D204 and the weak basic resin D308, PVP adsorbed fumaric acid in the presence of inorganic salts Performance is hardly affected by inorganic salts. D204 resin adsorbed fumaric acid is ion exchange. D308 resin adsorbed fumaric acid through Lewis action and electrostatic interaction. However, the adsorption behavior of fumaric acid by PVP resin was hydrogen bond. The adsorption was exothermic and spontaneous.