Abstract：
The occurrence of pharmaceutical pollutants in aqueous media has increased where significant research is being conducted to eliminate these toxic compounds. In the present study, Tetradecyltrimethylammonium bromide (TTAB) modified Cuminum cyminum agri-waste (CCW) was prepared to investigate the removal of diclofenac sodium (DCF) from aqueous solution in the batch process for the first time. Physical and chemical characterizations of as-prepared adsorbent were conducted using field emission scanning electron microscopy, Fourier-transform infrared spectroscopy, N2 adsorption-desorption, and point of zero charge analysis. Besides, the effect of the main parameters that affect the adsorption process, i.e., adsorbent dosage (0.25-6 g/L), contact time (0-300 min), initial DCF concentration (10-500 mg/L), and pH of the solution, were investigated. Furthermore, the resulted data were analyzed using various kinetic and isotherm models. The Pseudo-second-order model with R2 = 0.9981 showed the highest agreement with kinetic behavior. Also, the maximum adsorption capacity of DCF is 93.65 mg/g, according to the Langmuir isotherm. In acidic media, the adsorption capacity reached the highest value (44.69 mg/g). As a result, this study revealed that the agri-waste material could be modified and, as a low-cost adsorbent, have promising adsorption potential to remove pharmaceutical contaminants from the aqueous solution.
In this study, an innovative agricultural waste, Cuminum cyminum, has been used as low-cost material and modified with Tetradecyltrimethylammonium bromide cationic surfactant to remove diclofenac sodium (DCF) from aqueous solution in the batch process for the first time. TTAB-modified CCW exhibited an excellent adsorption capacity of 93.65 mg/g. Kinetic and equilibrium investigations were conducted with various models in detail.
In this study, an innovative agricultural waste, Cuminum cyminum, has been used as low-cost material and modified with Tetradecyltrimethylammonium bromide cationic surfactant to remove diclofenac sodium (DCF) from aqueous solution in the batch process for the first time. TTAB-modified CCW exhibited an excellent adsorption capacity of 93.65 mg/g. Kinetic and equilibrium investigations were conducted with various models in detail.
摘要：
在进行大量研究以消除这些有毒化合物的情况下，水性介质中药物污染物的出现有所增加。在本研究中,制备了十四烷基三甲基溴化铵（TTAB）改性的CuminumCuminumcyminumagri-waste（CCW），以首次研究分批工艺中双氯芬酸钠（DCF）从水溶液中的去除。使用场发射扫描电子显微镜对所制备的吸附剂进行了物理和化学表征，傅里叶变换红外光谱,N2吸附-解吸,和零电荷分析点。此外,影响吸附过程的主要参数的影响，即，吸附剂用量（0.25-6g/L），接触时间（0-300分钟），初始DCF浓度（10-500mg/L），和溶液的pH值，被调查了。此外，使用各种动力学和等温线模型分析所得数据。R2=0.9981的伪二阶模型显示出与动力学行为的最高一致性。此外，DCF的最大吸附容量为93.65mg/g，根据朗缪尔等温线.在酸性介质中,吸附量达到最高值(44.69mg/g)。因此,这项研究表明，农业废物材料可以被改性，作为一种低成本的吸附剂，有希望的吸附潜力，从水溶液中去除药物污染物。
在这项研究中,一种创新的农业废弃物，CuminumCuminum,首次将双氯芬酸钠（DCF）作为低成本材料，用十四烷基三甲基溴化铵阳离子表面活性剂进行了改性，以从间歇过程中去除水溶液中的双氯芬酸钠。TTAB改性的CCW表现出优异的吸附容量为93.65mg/g。用各种模型详细进行了动力学和平衡研究。
在这项研究中,一种创新的农业废弃物，CuminumCuminum,首次将双氯芬酸钠（DCF）作为低成本材料，用十四烷基三甲基溴化铵阳离子表面活性剂进行了改性，以从间歇过程中去除水溶液中的双氯芬酸钠。TTAB改性的CCW表现出优异的吸附容量为93.65mg/g。用各种模型详细进行了动力学和平衡研究。
