The adsorption study of anionic reactive blue 19 (RB19) and cationic methylene blue (MB) dyes from synthetic water was investigated using a new adsorbent. It was prepared from drinking water treatment sludge (DWTS) modified by iron nitrate. The surface area Brunauer, Emmett, and Teller BET increased from 15.58 to 106.12 m²/g after the iron incorporation. The adsorption of RB19 and MB on Fe-DWTS was carried out in a batch system to evaluate the effect of contact time (0–30 min), initial solution pH (2–8), Fe-DWTS dosage (0.5–2.5 g/L), and initial dye concentration (10–200 mg/L). The second-order kinetic model and Langmuir isotherm model provided the best fit to the experimental data for RB 19 and MB. The maximum adsorption capacities were found to be 40.16 and 46.08 mg/g for RB19 and MB, respectively.

使用新型吸附剂研究了阴离子活性蓝 19 (RB19) 和阳离子亚甲蓝 (MB) 染料从合成水中的吸附研究。它是由硝酸铁改性的饮用水处理污泥 (DWTS) 制备的。加入铁后，Brunauer、Emmett 和 Teller BET 的表面积从 15.58 增加到 106.12 m ² /g。RB19 和 MB 在 Fe-DWTS 上的吸附在批量系统中进行，以评估接触时间（0-30 分钟）、初始溶液 pH 值（2-8）、Fe-DWTS 用量（0.5-2.5 g/ L) 和初始染料浓度 (10–200 mg/L)。二级动力学模型和朗缪尔等温线模型为 RB 19 和 MB 的实验数据提供了最佳拟合。RB19 和 MB 的最大吸附容量分别为 40.16 和 46.08 mg/g。