Abstract Impregnated activated carbons (IACs) have been prepared successfully from aqueous solution of copper, zinc, silver and molybdenum for the removal of toxic gases from air. First, the activated carbon was impregnated by imbibing limit method with single metal, then a combination of 2 to 4 metals was used. The aim of this study was to access the adsorption capability of raw activated carbons (RAC) and IACs for SO2 and NO2 gases. Different techniques such as XRD, TEM, SEM, EDX mapping, AAS and BET surface area analyzer were used for characterization of materials. Results indicate that IACs provided satisfactory protection against challenge gases. Using the FTIR based gas analyzer, a significant increase in breakthrough time of all IACs was observed as compared to RAC. The maximum breakthrough time was achieved with four metals (Cu, Zn, Ag and Mo) impregnated on activated carbon i.e. 120.5 min for SO2 and 139.0 min for NO2, which were 13 and 25 times high respectively, in comparison with RAC. Adsorption capacity was found to be 320 mg SO2/g-C and 380 mg NO2/g-C. In comparison with RAC, ASZM2 carbon showed enhanced adsorption capability up to 30 times for SO2 and 40 times for NO2.

中文翻译：

---

Cu/Zn/Ag/Mo 基浸渍活性炭去除有毒气体的研究，在水介质中合成

摘要 用铜、锌、银和钼的水溶液成功制备了浸渍活性炭（IACs），用于去除空气中的有毒气体。首先，活性炭用单一金属通过吸收极限法浸渍，然后使用2至4种金属的组合。本研究的目的是获得原始活性炭 (RAC) 和 IAC 对 SO2 和 NO2 气体的吸附能力。XRD、TEM、SEM、EDX 映射、AAS 和 BET 表面积分析仪等不同技术用于表征材料。结果表明，IACs 对挑战气体提供了令人满意的保护。使用基于 FTIR 的气体分析仪，与 RAC 相比，观察到所有 IAC 的穿透时间显着增加。四种金属（Cu、Zn、Ag 和 Mo) 浸渍在活性炭上，即 SO2 需要 120.5 分钟，NO2 需要 139.0 分钟，与 RAC 相比，它们分别高出 13 和 25 倍。发现吸附容量为 320 mg SO2/gC 和 380 mg NO2/gC。与 RAC 相比，ASZM2 炭对 SO2 的吸附能力提高了 30 倍，对 NO2 的吸附能力提高了 40 倍。