Absorption is an effective way to control volatile organic compound (VOC) industrial air pollution, and the key variable in this process is the selection of suitable liquid absorbents to absorb as many organic pollutants as possible. The objective of this study was to prepare a series of high-efficiency absorbents with different proportions of vegetal oil, mineral oil, and waste engine oil, which can be used for toluene absorption. The absorption efficiency (AE), saturated absorption (SA), and effective absorption time (EAT) of various absorbents were systematically analyzed. The results showed that when the inlet concentration of toluene was 8000 mg/m³ and the inlet flow was 1 L/min, the SA capability of vegetal oil, mineral oil, and waste engine oil was 7.15, 12.43, and 18.16 mg/g, respectively. With the 4000 mg/m³ inlet concentration, the SA of the absorber which was made in the ratio of 2:3:1 was increased to 50.93 mg/g. According to the thermodynamic equilibrium and absorption results, it is proved that the influence of the composition of the absorbent on absorption is greater than viscosity. It is also to be noted that the AE of the composite absorbent can still reach more than 80% after three times of heating and air purification.

吸收是控制挥发性有机化合物（VOC）工业大气污染的有效途径，该过程中的关键变量是选择合适的液体吸收剂，以吸收尽可能多的有机污染物。本研究的目的是制备一系列不同比例的植物油、矿物油和废机油的高效吸收剂，可用于甲苯吸收。系统分析了各种吸收剂的吸收效率（AE）、饱和吸收（SA）和有效吸收时间（EAT）。结果表明，当甲苯入口浓度为 8000 mg/m ^{3 时}入口流量为1 L/min，植物油、矿物油和废机油的SA能力分别为7.15、12.43和18.16 mg/g。当入口浓度为 4000 mg/m ^{3 时}，按 2:3:1 比例制备的吸收器的 SA 增加到 50.93 mg/g。根据热力学平衡和吸收结果，证明吸收剂的组成对吸收的影响大于粘度。还需要注意的是，经过3次加热和空气净化后，复合吸收剂的AE仍然可以达到80%以上。