吸附
聚氨酯
环己烷
傅里叶变换红外光谱
氯苯
材料科学
辛烷值
扫描电子显微镜
化学工程
核化学
化学
有机化学
复合材料
催化作用
工程类
作者
Zeyu Wang,Liyong Hu,Min Zhao,Luyao Dai,Dzmitry Hrynsphan,Tatsiana Savitskaya,Jun Chen
出处
期刊:Biochar
[Springer Nature]
日期:2022-05-24
卷期号:4 (1)
被引量:85
标识
DOI:10.1007/s42773-022-00153-2
摘要
Abstract The development of a multifunctional oil adsorbing material which could effectively and quickly separate oily wastewater is one of the focuses in water environment restoration. In this study, bamboo charcoal (BC) was used as an improver to modify polyurethane (PU) foam. The results of scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR) revealed that the addition of BC could effectively improve the mechanical properties of PU. The adsorption data exhibited that the BC-loaded PU (BC/PU) foam composites effectively removed seven organic solvents (OSs, including octane, petroleum ether, soybean oil, chlorobenzene, 1,2-dichloroethane, n-hexane, cyclohexane), and the maximum adsorption capacity of BC/PU was 23.6 g g −1 when BC content was 5%. The order of pseudo-second-order kinetic constants and maximum adsorption capacity of seven OSs was octane < petroleum ether < soybean oil < chlorobenzene < 1, 2-dichloroethane < cyclohexane < n -hexane. Based on the experimental data and density functional theory (DFT) simulation, the adsorption mechanism of OSs on BC/PU-5 was discussed. The E HOMO and μ of OSs calculated by DFT were highly correlated with absorption affinity (K 2 , Q e and Q max ). Hence, the contribution of OSs to the adsorption efficiency of BC/PU-5 may be mainly due to electron donor–acceptor (EDA) interaction and non-hydrophobic interaction. In addition, the adsorption capacity did not change significantly after repeated recycling 5 times. Overall, the prepared BC/PU foam composites could be used as a potential candidate for separating OSs in engineering applications. Graphical Abstract
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