Performance evaluation and application of oxygen enriched waste rubber tire adsorbent for the removal of hazardous aniline derivatives from waste water
Performance evaluation and application of oxygen enriched waste rubber tire adsorbent for the removal of hazardous aniline derivatives from waste water
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DOI：
10.1016/j.cej.2012.07.051
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发表时间：
2012-09-01
影响因子：
15.1
通讯作者：
Agarwal, Shilpi
中科院分区：
文献类型：
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作者：
Gupta, Vinod Kumar;Nayak, Arunima;Agarwal, Shilpi
以苯胺、对氯苯胺、对甲苯胺和对茴香胺为吸附剂，研究了不同结构和表面化学性质的橡胶轮胎活性炭对苯胺、对氯苯胺、对甲苯胺和对茴香胺的液相吸附性能，探讨了表面化学性质对吸附性能的影响，并对具体的废水处理系统进行了设计和分析。开发了具有高比表面积和良好结构特性的橡胶轮胎活性炭，其具有富氧官能团（RTAC（ox））和不具有富氧官能团（RTAC），并且将它们的吸附能力与纯微孔商业炭进行了比较。孔结构和吸附质的大小对RTAC和CAC的吸附有影响，其趋势为：苯胺>对甲苯胺>对茴香胺>对氯苯胺。RTAC（ox）的上级性能归因于具有较大中孔体积的氧官能团沿着。RTAC（ox）吸附对氨基苯甲醚>对甲苯胺>苯胺>对氯苯胺的趋势与所研究吸附物的碱性有很好的相关性。批平衡和热力学研究证实了这一结果。用真实的废水进行的柱实验确立了所开发系统的实用性。再生和重复使用而不显著的效率损失是高级吸附剂在RTAC（ox）中用于废水处理的重要标准。(C)2012爱思唯尔有限公司版权所有。
Liquid-phase adsorption of aniline, p-Cl-aniline, p-toluidine and p-anisidine onto rubber tire activated carbons with different textural and surface chemistry was conducted to explore not only the influence of the surface chemical characteristics on the adsorption capacity but also in designing and analyzing the specific studied system for waste water treatment. Rubber tire activated carbons having high surface area and favorable textural properties with oxygen enriched functional groups (RTAC(ox)) and without (RTAC) were developed and their adsorption capacity compared with a purely microporous commercial carbon. The pore structure and the adsorbate size played an influencing role in the adsorption of RTAC and CAC, the trend followed being: aniline > p-toluidine > p-anisidine > p-chloro aniline. Superior performance of RTAC(ox) was attributed to the oxygen functional groups along with larger mesopore volume. Uptake trend of p-anisidine > p-toluidine > aniline > p-chloro aniline by RTAC(ox) correlated well with the basicity of the studied adsorbates. Such results were corroborated by the batch equilibrium and thermodynamic studies. Column experiments with real waste water established the practicality of the developed system. The regeneration and reuse without significant loss in efficiency showed an important criterion of advanced adsorbent in RTAC(ox) for waste water treatment. (C) 2012 Elsevier B.V. All rights reserved.