Abstract Benzene is one of the most harmful VOCs pollutions which its control emission is a vital purpose in industries and environment. A new and efficient method based on solid phase gas extraction (SPGE) with Schiff base immobilized on MWCNTs (TerphApm@MWCNTs) as a novel sorbent was used for benzene removal from artificial air after loaded in Robson quartz tubes (RGT). The TerphApm@MWCNTs were synthesized and purified via heat treatment at 60 °C as a new heterogeneous sorbent. In bench scale set up, a system was designed and developed for standard gas generation of benzene in air with difference concentrations, and then was passed through RGT by SKC pump at optimized flow rate. Benzene volatile was absorbed on the TerphApm@MWCNTs and desorbed from it at 80 °C before determined by GC/FID. The important factors such as, temperature, humidity, benzene concentration, amount of adsorbent and flow rate were optimized. The recovery and capacity of benzene capture with 20 mg of TerphApm@MWCNTs were obtained 98% and 492 mg g−1 (25 °C). The flow rate and temperature had highly impact on the removal efficiency and adsorption capacity. According to results, the unique characterization of TerphApm@MWCNTs can be considered as a best adsorbent for benzene removal from air as compare to MWCNTs, SWCNTs, and NAC.

中文翻译：

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空气污染控制：评估 TerphApm@MWCNTs 作为一种新型多相吸附剂，用于通过固相气体萃取从空气中去除苯

摘要 苯是危害最大的VOCs污染物之一，其控制排放在工业和环境中具有重要意义。一种基于固相气体萃取（SPGE）的新型高效方法，将希夫碱固定在多壁碳纳米管上（TerphApm@MWCNTs）作为一种新型吸附剂，用于在装载到罗布森石英管（RGT）后从人造空气中去除苯。TerphApm@MWCNTs 是通过在 60 °C 下热处理合成和纯化的，作为一种新的非均相吸附剂。在实验室规模设置中，设计和开发了一个系统，用于在空气中生成不同浓度的苯标准气体，然后通过 SKC 泵以优化的流速通过 RGT。苯挥发物被吸收在 TerphApm@MWCNTs 上并在 80°C 下从其中解吸，然后由 GC/FID 测定。温度、湿度等重要因素 对苯浓度、吸附剂用量和流速进行了优化。用 20 mg TerphApm@MWCNTs 捕获苯的回收率和容量分别为 98% 和 492 mg g-1 (25 °C)。流速和温度对去除效率和吸附容量有很大影响。根据结果​​，与 MWCNTs、SWCNTs 和 NAC 相比，TerphApm@MWCNTs 的独特特性可以被认为是从空气中去除苯的最佳吸附剂。