研究了阳离子表面活性剂十六烷基三甲基溴化铵改性斜沸石（天然沸石）对煤油中挥发性有机物的吸附

IF 1.6 Q2 MULTIDISCIPLINARY SCIENCES

MethodsX Pub Date : 2025-05-07 DOI:10.1016/j.mex.2025.103354

Motahareh Majidi Trojeni, Abdolraouf Samadi-Maybodi, Haniyeh Shafiei

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引用次数: 0

摘要

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，需要采取有效的补救策略。采用阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）对天然斜沸石分子筛进行改性，并将其作为吸附剂用于煤油中挥发性有机化合物的吸附。采用实验设计优化吸附效果（R%）。优化过程中考虑了接触时间、pH、吸附剂投加量等可能影响吸附效率的参数。结果表明，在pH= 3.0，吸附剂用量= 0.4 g，接触时间为180 min时，吸附效率最高。为了研究吸附行为，研究了Freundlich和Langmuir等温线模型。热力学分析表明，该过程是自发的吸热过程。结果表明，吸附过程符合Langmuir等温模型，决定系数（R2）为0.9906。阳离子表面活性剂修饰的沸石对煤油中挥发性有机化合物的吸附性较高。这项研究强调了表面活性剂改性斜沸石作为一种可行和有效的吸附剂的潜力，用于修复煤油中挥发性有机化合物的排放，为可持续的环境实践铺平了道路。•成功地用十六烷基三甲基溴化铵（CTAB）改性天然斜沸石沸石，以增强对煤油中VOC的吸附。•利用傅里叶变换红外（FTIR）分光光度法和能量色散光谱（EDX）对改性沸石进行了表征。•在pH= 3.0、吸附剂用量0.4 g、接触时间180 min的条件下，吸附效果最佳。

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Investigating the adsorption of volatile organic compounds from kerosene using clinoptilolite (natural zeolite) modified by cationic surfactant cetyltrimethylammonium bromide

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Investigating the adsorption of volatile organic compounds from kerosene using clinoptilolite (natural zeolite) modified by cationic surfactant cetyltrimethylammonium bromide

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 (R²) 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.

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Successfully modified natural clinoptilolite zeolite with cetyltrimethylammonium bromide (CTAB) to enhance VOC adsorption from kerosene.
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Characterized the modified zeolite using Fourier transform infrared (FTIR) spectrophotometry and energy dispersive spectroscopy (EDX).
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Achieved optimal adsorption efficiency with conditions of pH= 3.0, adsorbent dosage of 0.4 g and contact time of 180 min.

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