空气污染分析:多壁碳纳米管镍浆作为新型空气中汞的吸附剂

A. Ebrahimi, Ahmad Salarifar
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引用次数: 16

摘要

汞是一种危害人类健康的有害物质。在本研究中,镍包覆在多壁碳纳米管(Ni-MWCNTs)上作为一种新型吸附剂去除空气中的汞蒸汽。采用固气相脱除法(SGPR)实现了汞与Ni-MWCNTs的汞齐化。在实验装置中,汞蒸汽以优化的流速产生并移动到吸附剂中。Ni-MWCNTs在200℃下热解吸后,汞蒸气与氩气一起流入石英玻璃池,采用冷蒸汽原子吸收光谱仪技术(CV-AAS)进行测定。在优化条件下,分别使用25 mg Ni-MWCNTs和30-100nm不同尺寸的MWCNTs。吸附剂吸附量分别为194 mg g-1和64 mg g-1。在温度25 ~ 40℃、流速200 mL min-1的优化条件下,获得了较好的回收率。因此,Ni-MWCNTs具有良好的去除空气中汞蒸汽的潜力,可作为工业工作场所低成本高效的吸附剂使用
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Air pollution Analysis: Nickel paste on Multi-walled carbon nanotubes as novel adsorbent for the mercury removal from air
Mercury as a hazardous material caused health problem in humans.In this study,mercury vapor removed from air by nickel-coated on multi-walled carbon nanotubes(Ni-MWCNTs)as a novel sorbent.Amalgamation of mercury with Ni-MWCNTs was achieved by solid-gas phase removal method(SGPR).In bench scale set up, the mercury vapor generated and moved to sorbent at optimized flow rate.After thermal desorption of Ni-MWCNTs at 200oC, the mercury vapor flowed to quartz glass cell with argon gas and determined by cold vapor atomic absorption spectrometer technique(CV-AAS).In optimized conditions,25 mg of Ni-MWCNTs and MWCNTs with different size from 30-100nm was used.The adsorption capacity of sorbents was obtained 194 mg g-1 and 64 mg g-1,respectively.The efficient recovery was obtained at optimized conditions such as, temperature of 25-40 and flow rate of 200 mL min-1.So, Ni-MWCNTs had good potential for removal of mercury vapor from the air and can be used as a low cost and efficient sorbent in industrial workplace
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