Nowadays, removal of contaminants like dye from wastewater has become an uncompromising task. In view of this, enhancing the performance of adsorbents so as to facilitate the adsorption technique and reduce the overall cost of the purification process is of great interest to industrial sector. In this study, the adsorption capacity of clay was improved by spray drying a dispersed clay solution and also through its surface modification. Fourier transform infrared spectroscopy (FTIR) confirmed that the surface modification was successful; X-ray diffraction (XRD) analysis showed that surface modification did not affect the crystal structure of the clay, and BET specific surface area results attest that spray dried clay has the highest surface area of 102 m²/g. The adsorption tests were carried out using methylene blue and results showed that the adsorption capacity was influenced by solution pH, with maximum adsorption at pH 10 and 120 min contact time. Adsorption kinetics data were well fitted to pseudo-second order kinetics model. Langmuir and Freundlich adsorption isotherm models were used to investigate the mechanism of adsorption. Freundlich model is more applicable for this process. Spray dried clay performed better than the modified and raw clay with adsorption capacity of 168 mg/g (at 333 K). The calculated thermodynamics parameters revealed that the adsorption process is spontaneous at all the studied temperatures (303–333 K) for spray dried clay.

如今，从废水中去除诸如染料之类的污染物已成为一项不折不扣的任务。鉴于此，提高吸附剂的性能以促进吸附技术并降低纯化过程的总成本是工业领域的极大兴趣。在这项研究中，通过对分散的粘土溶液进行喷雾干燥以及对其表面进行改性，可以提高粘土的吸附能力。傅里叶变换红外光谱（FTIR）证实表面改性是成功的。X射线衍射（XRD）分析表明，表面改性不会影响粘土的晶体结构，BET比表面积结果证明，喷雾干燥的粘土的最大表面积为102 m ²/G。用亚甲基蓝进行吸附试验，结果表明，溶液的pH值对吸附能力有影响，在pH 10和120 min的接触时间下吸附量最大。吸附动力学数据很好地拟合了伪二级动力学模型。用Langmuir和Freundlich吸附等温线模型研究了吸附机理。Freundlich模型更适用于此过程。喷雾干燥粘土的性能优于改性粘土和未加工粘土，其吸附容量为168 mg / g（在333 K下）。计算出的热力学参数表明，在所有研究温度（303–333 K）下，喷雾干燥粘土的吸附过程都是自发的。