Trojeni Motahareh Majidi, Samadi-Maybodi Abdolraouf, Shafiei Haniyeh
Analytical Division, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran.
MethodsX. 2025 May 7;14:103354. doi: 10.1016/j.mex.2025.103354. eCollection 2025 Jun.
Volatile organic compounds (VOCs) from kerosene pose significant environmental and health risks, necessitating effective remediation strategies. In this work, the natural clinoptilolite zeolite was modified using cationic surfactant cetyltrimethylammonium bromide (CTAB) and it was applied as an adsorbent for adsorption of VOCs from kerosene. The adsorption efficacy (R%) was optimized using Experimental design. The parameters of contact time, pH and adsorbent dosage that can be potentially influence on the adsorption efficiency were considered in the optimization process. Results of the optimization process indicated that the highest of adsorption efficiency was obtained as follows: pH= 3.0, dose of adsorbent = 0.4 g and contact time 180 min. To find the behavior of adsorption, the isotherm models of Freundlich and Langmuir were studied. Also, thermodynamic analysis showed the process was spontaneous and endothermic. Results indicated the adsorption process follows a Langmuir isotherm model with a coefficient of determination (R) of 0.9906. The adsorption of VOCs from kerosene by a cationic surfactant-modified zeolite was higher. This research underscores the potential of surfactant-modified clinoptilolite as a viable and efficient adsorbent for the remediation of VOC emissions from kerosene, paving the way for sustainable environmental practices.•Successfully modified natural clinoptilolite zeolite with cetyltrimethylammonium bromide (CTAB) to enhance VOC adsorption from kerosene.•Characterized the modified zeolite using Fourier transform infrared (FTIR) spectrophotometry and energy dispersive spectroscopy (EDX).•Achieved optimal adsorption efficiency with conditions of pH= 3.0, adsorbent dosage of 0.4 g and contact time of 180 min.
煤油中的挥发性有机化合物（VOCs）对环境和健康构成重大风险，因此需要有效的修复策略。在这项工作中，天然斜发沸石用阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）进行改性，并将其用作吸附剂以吸附煤油中的VOCs。使用实验设计优化吸附效率（R%）。在优化过程中考虑了可能对吸附效率产生潜在影响的接触时间、pH值和吸附剂用量等参数。优化过程的结果表明，在以下条件下可获得最高吸附效率：pH = 3.0、吸附剂用量 = 0.4 g和接触时间180分钟。为了研究吸附行为，研究了Freundlich和Langmuir等温模型。此外，热力学分析表明该过程是自发的且吸热的。结果表明吸附过程遵循Langmuir等温模型，决定系数（R）为0.9906。阳离子表面活性剂改性沸石对煤油中VOCs的吸附更高。本研究强调了表面活性剂改性斜发沸石作为一种可行且高效的吸附剂用于修复煤油中VOC排放的潜力，为可持续环境实践铺平了道路。•成功用十六烷基三甲基溴化铵（CTAB）改性天然斜发沸石以增强对煤油中VOC的吸附。•使用傅里叶变换红外（FTIR）分光光度法和能量色散光谱（EDX）对改性沸石进行表征。•在pH = 3.0、吸附剂用量0.4 g和接触时间180分钟的条件下实现了最佳吸附效率。
