A. Faghihi-Zarandi, Mohammad Reza Rezaei Kahkha, Mohammad Bagher Aghebatbekheir, Nasser Hasheminejad
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引用次数: 0
摘要
苯对人体有致癌作用,从空气中吸附是控制它的最好方法。本研究以钽金属-有机骨架(Ta-MOF)为基础,采用气-固相相互作用(GF-SPI)对空气中的苯蒸汽进行脱除。研究了室温下Ta-MOF对苯的静态和动态吸附。采用气相色谱法(GC-FID)分析苯的浓度。对苯的初始浓度、吸附剂用量、暴露时间、流速、温度等因素对脱苯效率的影响进行了研究和优化。结果表明,Ta-MOF在静态和动态体系中对苯的吸附量范围分别为90 ~ 160 mg g-1和65 ~ 135 mg g-1。在45℃,67.5 mg L-1苯浓度,0.5 g Ta-MOF, 250 mL min-1的动态系统流速下,去除率达到95%以上。通过动力系统,苯在腔室中生成,储存在袋中,然后在Ta-MOF表面移动。通过气相色谱-质谱联用和实际样品峰化验证了GF-SPI方法的有效性。
Removal of benzene vapor from the air based on novel tantalum metal-organic framework (Ta-MOF) adsorbent by gas flow solid-phase interaction before determination by gas chromatography
Benzene has a carcinogenic effect on the human body and adsorption from the air is the best way to control it. By this research, benzene vapor was removed from the air based on a tantalum metal-organic framework (Ta-MOF) by gas flow solid-phase interaction (GF-SPI). Benzene adsorption with Ta-MOF was studied in the static and dynamic systems at room temperature. The benzene concentration was analyzed by gas chromatography equipped with an FID detector (GC-FID). The factors affecting benzene removal efficiency like initial concentration of benzene, amount of adsorbent, exposure time, flow rate, and temperature were studied and optimized. The results showed us, the adsorption capacities range of Ta-MOF for benzene in the static and dynamic system were obtained between 90-160 mg g-1 and 65-135 mg g-1, respectively. Also, the high removal efficiency was achieved by more than 95% at 45°C, 67.5 mg L-1 benzene concentration, 0.5 g of Ta-MOF, and the flow rate of 250 mL min-1 for a dynamic system. By dynamic system, the benzene is generated in the chamber, stored in a bag, and then moved on the surface of Ta-MOF. The GF-SPI method was validated by GC-MS and spiking real samples.