Trichloroethylene (TCE) is commonly found in ground water, and it may serve as a major source of many types of cancers such as kidney, liver, lymphatic glands, and spinal cord. In the present research, TCE uptake from aqueous media by montmorillonite (Mt) modified by tetradecyl trimethyl ammonium bromide (TTAB) surfactant was explored. Firstly, the characteristics of raw and modified montmorillonite (raw‐Mt and TTAB‐Mt) were analyzed by SEM, FTIR, XRD, and XRF instruments. Then, the sorption process was evaluated as a function of different factors such as surfactant loading rate, pH, ionic strength, contact time, sorbent dosage, TCE concentration, temperature, and regeneration agent. The maximum TCE sorption by the modified clay was obtained at surfactant loading rate of 120% cation exchange capacity of the clay. The maximum removal efficiency of TCE by the modified clay was 99.6% at pH 5 and 30 min contact time. The findings also exhibited that the isotherm and kinetic sorption followed the Freundlich and pseudo‐second‐order models, respectively. It can be concluded that TTAB‐Mt, as a cheap, abundant, non‐toxic, and environmental friendly adsorbent can be considered to remove TCE in aqueous phase.

中文翻译：

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阳离子表面活性剂改性粘土在水溶液中脱除三氯乙烯的平衡，动力学和热力学研究

三氯乙烯（TCE）通常在地下水中发现，它可能是许多类型癌症的主要来源，例如肾脏，肝脏，淋巴腺和脊髓。在本研究中，探索了由十四烷基三甲基溴化铵（TTAB）表面活性剂改性的蒙脱石（Mt）从水性介质中吸收的TCE。首先，通过SEM，FTIR，XRD和XRF仪器分析了原始和改性蒙脱土（原始Mt和TTAB-Mt）的特性。然后，根据不同因素对吸附过程进行评估，例如表面活性剂的上样率，pH，离子强度，接触时间，吸附剂用量，TCE浓度，温度和再生剂。在表面活性剂负载率为粘土阳离子交换能力的120％时，改性粘土最大的TCE吸附量。在pH 5和30分钟的接触时间下，改性粘土对TCE的最大去除效率为99.6％。研究结果还表明，等温线和动力学吸附分别遵循Freundlich模型和拟二阶模型。可以得出结论，TTAB‐Mt是一种廉价，丰富，无毒且环保的吸附剂，可以考虑去除水相中的TCE。