The poor indoor air quality can be associated with the released volatile organic compounds (VOCs) from different sources. The extent of the concern may increase depending on the presence of benzene, toluene, ethylbenzene, and xylene (BTEX) and exposure to them in the indoor air. Adsorption with activated carbon, which is a very effective method, is preferred to eliminate highly volatile gaseous pollutants and reduce the extend of their negative impact. In this work, the removal efficiency of a novel activated carbons (MSRACs), prepared from stems of Corylus colurna (CCBW) by chemical processes using H₂SO₄, H₃PO₄, and HCl, was scrutinized towards BTEX pollutants. The adsorbents acquired from this lignin-based waste were investigated from porosity and surface chemistry aspects. The highest surface area of 1424 m²/g and micropore volume of 0.46 cm³/g were attained after activation of MSRAC11 adsorbent sample by H₂SO₄-70wt%. The performances of the fabricated adsorbent samples were evaluated and the order of MSRAC11>MSRAC24>MSRAC36 was obtained in the multiple concentrations of BTEX. This study introduces an easy method for producing efficient adsorbents from lignin-based waste for filtering indoor air and designing BTEX-capturing systems for various applications.

室内空气质量差可能与不同来源释放的挥发性有机化合物（VOC）有关。根据室内空气中苯、甲苯、乙苯和二甲苯 (BTEX) 的存在以及接触这些物质的情况，担忧的程度可能会增加。活性炭吸附是消除高挥发性气态污染物并减少其负面影响范围的一种非常有效的方法。在这项工作中，我们仔细研究了一种新型活性炭（MSRAC）对苯系物污染物的去除效率，该活性炭由榛子茎（CCBW）通过化学工艺使用 H ₂ SO ₄、H ₃ PO _{4和 HCl 制备而成。}从孔隙率和表面化学方面研究了从这种木质素废物中获得的吸附剂。_{MSRAC11吸附剂样品经H 2} SO ₄ -70wt%活化后获得最高表面积1424 m ² /g和微孔体积0.46 cm ^{3 /g。}对所制备的吸附剂样品的性能进行了评估，得出在多种苯系物浓度下，MSRAC11>MSRAC24>MSRAC36的顺序。这项研究介绍了一种简单的方法，可以从木质素废物中生产高效吸附剂，用于过滤室内空气，并为各种应用设计苯系物捕获系统。