Cui Xiubin, Zhang Haitao, Qu Jianbo, Chao Mingzhen, Ma Shanghong, Hu Qingfei, Yu Xin
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; Faculty of Light Industry, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; Faculty of Light Industry, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
Int J Biol Macromol. 2025 Apr;301:140420. doi: 10.1016/j.ijbiomac.2025.140420. Epub 2025 Jan 28.
The development of green and cost-effective biomass adsorbents is necessary for removing large amounts of dyes from wastewater. In this study, polyurethane prepolymers were synthesized using polycaprolactone diol (OH-PCL-OH), isophorone diisocyanate, and 2,2-dihydroxymethylpropionic acid, which were subsequently dispersed in aqueous carboxymethyl chitosan (CMCS) solution to produce waterborne polyurethane (WPU)-CMCS porous materials. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FT-IR), thermogravimetric (TGA) and mercury intrusion porosimetry (MIP). The effects of pH, temperature, initial concentration and contact time on the adsorption properties of the adsorbents were investigated. The adsorption kinetics and isotherms were used to fit the adsorption data, and the reusability and biodegradability of the adsorbent were investigated. The results showed that the maximum adsorption capacity of WPU-CMCS was 222.65 mg·g and the adsorption process followed the Langmuir model. After four adsorption-resolution cycles, the removal of dyes remained at 70.36 %, whereas in the biodegradability test, the mass loss of WPU-CMCS reached 43.04 % after 25 weeks, indicating that the adsorbent had good reusability and biodegradability.
开发绿色且经济高效的生物质吸附剂对于从废水中去除大量染料而言是必要的。在本研究中，使用聚己内酯二醇（OH-PCL-OH）、异佛尔酮二异氰酸酯和2,2-二羟甲基丙酸合成了聚氨酯预聚物，随后将其分散在羧甲基壳聚糖（CMCS）水溶液中以制备水性聚氨酯（WPU）-CMCS多孔材料。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱仪（FT-IR）、热重分析（TGA）和压汞法（MIP）对吸附剂进行了表征。研究了pH、温度、初始浓度和接触时间对吸附剂吸附性能的影响。采用吸附动力学和等温线对吸附数据进行拟合，并研究了吸附剂的可重复使用性和生物降解性。结果表明，WPU-CMCS的最大吸附容量为222.65 mg·g ，吸附过程遵循朗缪尔模型。经过四个吸附-解吸循环后，染料去除率仍保持在70.36%，而在生物降解性测试中，25周后WPU-CMCS的质量损失达到43.04%，表明该吸附剂具有良好的可重复使用性和生物降解性。
