The rapid expansion of industrialization has a significant contribution to the economic development of many nations. But, the untreated discharge from the textile factory is severely impacting freshwater and public health. Therefore, this study was aimed to prepare activated bentonite for removal of chemical oxygen demand (COD) from textile industrial wastewater, and the optimization process was studied using design expert software version 11. The activation of the bentonite was performed using diluted sulfuric acid and followed by a thermal process. Adsorbent characterization was carried out using the proximate analysis (moisture content), bulk density, BET method of specific surface area, scanning electron microscope, Fourier transform infrared spectroscopy, and X-ray diffraction. The COD and pH of textile industrial effluent were 569 ± 23 mg/L and pH 6 ± 0.3, respectively. The specific surface area of modified bentonite was found to be 265 m²/g. Maximum COD removal of 76.5% was recorded at the optimum condition of contact time 120 min., pH 10, and adsorbent dosage 2 g, whereas the maximum predicted COD removal was 76.0%. COD removal was highly influenced by the adsorbent dose described by the regression analysis (R² = 0.98). Increasing the adsorption factors and interaction effects resulted in increasing the COD removal and vice versa, but the interaction effect between the pH and adsorbent dose was inversely proportional to COD removal. Generally, the adsorption results were encouraging and modified bentonite is a promising candidate to be implemented for organic matter removal from textile industrial wastewater.

工业化的迅速发展为许多国家的经济发展做出了重大贡献。但是，未经处理的纺织厂排放物正在严重影响淡水和公众健康。因此，本研究旨在制备用于从纺织工业废水中去除化学需氧量（COD）的活性膨润土，并使用11版设计专家软件对优化过程进行了研究。膨润土的活化是使用稀硫酸进行的，然后进行通过热处理。吸附剂的表征使用近似分析（水分含量），堆积密度，比表面积的BET方法，扫描电子显微镜，傅里叶变换红外光谱和X射线衍射进行。纺织工业废水的COD和pH分别为569±23 mg / L和pH 6±0.3。发现改性膨润土的比表面积为265 m² /克。在最佳接触时间120分钟，pH 10和吸附剂剂量2 g的最佳条件下，记录的最大COD去除率为76.5％，而最大预测COD去除率为76.0％。回归分析描述的吸附剂剂量对COD的去除有很大影响（R ²  = 0.98）。吸附因子和相互作用效应的增加导致COD去除率的增加，反之亦然，但pH和吸附剂量之间的相互作用效应与COD去除率成反比。通常，吸附结果令人鼓舞，改性膨润土是从纺织工业废水中去除有机物的有希望的候选者。