Montmorillonite clay (MC) yields after modification of the interlamellar spacing and the chemical character of its surface by treatment with cetyltrimethylammonium bromide (CTAB) a solid product (MCCTA). This has been used as an adsorbent for the removal of p-nitrophenol (PNP) from aqueous solutions. The MCCTA samples were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TG/DTA), FT-IR spectroscopy, zeta potential measurements, X-ray diffraction (XRD), and specific surface area. Investigations were also carried out to assess how the adsorption of PNP was affected by factors such as contact time, initial PNP concentration, adsorbent dosage and temperature. Of the two models tried the Freundlich isotherm gave a better account of the equilibrium data than did the Langmuir one. The kinetics could be successfully replicated by a pseudo-second order model with an activation energy of 55.0 kJ mol⁻¹, while the thermodynamic parameters indicated an exothermic (Δ_adsH^o = −15.8 kJ mol⁻¹), non-spontaneous (Δ_adsG^o = +3.9 to 5.9 kJ mol⁻¹) adsorption process. The experimental results showed MCCTA, unlike natural MC, to have a significant adsorption capacity for PNP removal from aqueous media.

通过用十六烷基三甲基溴化铵（CTAB）处理固体产物（MCCTA），可以改变层间距和表面化学特性，从而得到蒙脱土（MC）。它已用作从水溶液中去除对硝基苯酚（PNP）的吸附剂。MCCTA样品通过扫描电子显微镜（SEM），能量色散X射线光谱（EDX），热重分析（TG / DTA），FT-IR光谱，ζ电位测量，X射线衍射（XRD）和比对进行了表征表面积。还进行了研究以评估PNP的吸附如何受到接触时间，初始PNP浓度，吸附剂剂量和温度等因素的影响。在两种模型中，与伦格缪尔等温线相比，弗氏等温线更好地说明了平衡数据。^-1，而热力学参数指示的放热（Δ_广告ħ ^ö = -15.8千焦摩尔^-1），非自发（Δ_广告ģ ^ø = 3.9至5.9千焦耳摩尔^-1）吸附过程。实验结果表明，与天然MC不同，MCTCA具有从水介质中去除PNP的显着吸附能力。