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首页> 外文期刊>Environmental research >Competitive adsorption of gaseous aromatic hydrocarbons in a binary mixture on nanoporous covalent organic polymers at various partial pressures
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Competitive adsorption of gaseous aromatic hydrocarbons in a binary mixture on nanoporous covalent organic polymers at various partial pressures

机译：在不同分压下，二元混合物中的气态芳烃在纳米多孔共价有机聚合物上的竞争性吸附

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摘要

Covalent-organic polymers (COPs) are recognized for their great potential for treating diverse pollutants via adsorption. In this study, the sorption behavior of benzene and toluene was investigated both individually and in a binary mixture against two types of COPs possessing different -NH2 functionalities. Namely, the potential of COPs was tested against benzene and toluene in a low inlet partial pressure range (0.5-20 Pa) using carbonyl-incorporated aromatic polymer (CBAP)-1-based diethylenediamine (EDA) [CD] and ethylenetriamine (DETA) [CE]. The maximum adsorption capacity and breakthrough values of both COPs showed dynamic changes with increases in the partial pressures of benzene and toluene. The maximum adsorption capacities (A(max)) of benzene (as the sole component in N-2 under atmospheric conditions) on CD and CE were in the range of 24-36 and 33-75 mg g(-1), respectively. In contrast, with benzene and toluene in a binary mixture, the benzene A(max) decreased more than two-fold (range of 2.7-15 and 6-39 mg g(-1), respectively) due to competition with toluene for sorption sites. In contrast, the toluene A(max) values remained consistent, reflecting its competitive dominance over benzene. The adsorption behavior of the targeted compounds (i.e., benzene and toluene) was explained by fitting the adsorption data by diverse isotherm models (e.g., Langmuir, Freundlich, Elovich, and Dubinin-Radushkevich). The current research would be helpful for acquiring a better understanding of the factors affecting competitive adsorption between different VOCs in relation to a given sorbent and across varying partial pressures.
机译：共价有机聚合物（COPs）因其通过吸附处理各种污染物的巨大潜力而​​闻名。在这项研究中，分别研究了苯和甲苯在二元混合物中对两种具有不同-NH2官能度的COP的吸附行为。即，使用结合有羰基的芳族聚合物（CBAP）-1-基二乙二胺（EDA）[CD]和乙撑三胺（DETA）在低入口分压范围（0.5-20 Pa）中测试了COPs对抗苯和甲苯的潜力。 [CE]。两种COP的最大吸附容量和突破值均随苯和甲苯分压的增加而发生动态变化。苯（作为大气中N-2的唯一组分）在CD和CE上的最大吸附容量（A（max））分别在24-36和33-75 mg g（-1）范围内。相反，在二元混合物中使用苯和甲苯时，苯A（max）下降两倍以上（分别在2.7-15和6-39 mg g（-1）范围内），原因是与甲苯竞争吸附网站。相比之下，甲苯A（max）值保持一致，反映出其对苯的竞争优势。通过用各种等温模型（例如Langmuir，Freundlich，Elovich和Dubinin-Radushkevich）拟合吸附数据来说明目标化合物（即苯和甲苯）的吸附行为。当前的研究将有助于更好地理解与给定的吸附剂有关的和不同的分压下影响不同VOC之间竞争性吸附的因素。

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  • 来源
    《Environmental research》 |2019年第6期|1-11|共11页
  • 作者

    Maitlo Hubdar Ali; Kim Ki-Hyun; Khan Azmatullah; Szulejko Jan E.; Kim Jo Chun; Song Hee Nam; Ahn Wha-Seung;

  • 作者单位

    Hanyang Univ, Dept Civil & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea;

    Hanyang Univ, Dept Civil & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea;

    Hanyang Univ, Dept Civil & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea|Balochistan Univ Informat Technol Engn & Manageme, Dept Civil Engn, Quetta, Pakistan;

    Hanyang Univ, Dept Civil & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea;

    Konkuk Univ, Dept Environm Engn, 120 Neungdong Ro, Seoul 05029, South Korea;

    ACEN Co Ltd, Dukyong Dearo 1556-16, Suwon 16670, Gyeonggi Do, South Korea;

    Inha Univ, Dept Chem & Chem Engn, Incheon 22212, South Korea;

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  • 正文语种 eng
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  • 关键词

    Benzene; Toluene; Covalent organic polymers; Isotherm models; Adsorption;

    机译：苯甲苯共价有机聚合物等温模型吸附;

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