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首页> 外文期刊>Journal of environmental sciences >Adsorptive removal of hydrophobic organic compounds by carbonaceous adsorbents: A comparative study of waste-polymer-based, coal-based activated carbon, and carbon nanotubes
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Adsorptive removal of hydrophobic organic compounds by carbonaceous adsorbents: A comparative study of waste-polymer-based, coal-based activated carbon, and carbon nanotubes

机译：含碳吸附剂对疏水性有机化合物的吸附去除：废聚合物基，煤基活性炭和碳纳米管的比较研究

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摘要

Adsorption of the hydrophobic organic compounds (HOCs) trichloroethylene (TCE), 1,3-dichlorobenzene (DCB), 1,3-dinitrobenzene (DNB) and γ-hexachlorocyclohexane (HCH) on five different carbonaceous materials was compared. The adsorbents included three polymer-based activated carbons, one coal-based activated carbon (F400) and multiwalled carbon nanotubes (MWNT). The polymer-based activated carbons were prepared using KOH activation from waste polymers: polyvinyl chloride (PVC), polyethyleneterephthalate (PET) and tire rubber (TR). Compared with F400 and MWNT, activated carbons derived from PVC and PET exhibited fast adsorption kinetics and high adsorption capacity toward the HOCs, attributed to their extremely large hydrophobic surface area (2700 m~2/g) and highly mesoporous structures. Adsorption of small-sized TCE was stronger on the tire-rubber-based carbon and F400 resulting from the pore-filling effect. In contrast, due to the molecular sieving effect, their adsorption on HCH was lower. MWNT exhibited the lowest adsorption capacity toward HOCs because of its low surface area and characteristic of aggregating in aqueous solution.
机译：比较了疏水有机化合物（HOC），三氯乙烯（TCE），1,3-二氯苯（DCB），1,3-二硝基苯（DNB）和γ-六氯环己烷（HCH）在五种不同碳质材料上的吸附能力。吸附剂包括三种基于聚合物的活性炭，一种基于煤的活性炭（F400）和多壁碳纳米管（MWNT）。使用KOH活化法从废聚合物：聚氯乙烯（PVC），聚对苯二甲酸乙二醇酯（PET）和轮胎橡胶（TR）制备基于聚合物的活性炭。与F40​​0和MWNT相比，源自PVC和PET的活性炭表现出快速的吸附动力学和对HOC的高吸附能力，这归因于它们的疏水表面积（2700 m〜2 / g）非常大且介孔结构高度。由于孔隙填充效应，小尺寸三氯乙烯对轮胎橡胶基碳和F400的吸附更强。相反，由于分子筛作用，它们在六氯环己烷上的吸附较低。 MWNT由于其低表面积和在水溶液中聚集的特性而表现出对HOC的最低吸附能力。

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