Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology Hisar, 125001, India.
Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology Hisar, 125001, India; Department of Environmental Science and Technology, Central University of Punjab, Bathinda, 151001, Punjab, India.
Chemosphere. 2019 Dec;236:124280. doi: 10.1016/j.chemosphere.2019.07.011. Epub 2019 Jul 3.
This study deals with the removal of cationic dyes from the simulated wastewater using FeO nanoparticles loaded activated carbon. FeO@AC nanoparticles were synthesised using co-precipitation methods. The FeO@AC nanoparticles (nps) were characterised using different techniques and data revealed that the synthesised nanoparticles were 6-16 nm in diameter. pHpzc of FeO@AC nanoparticles was 7.8. BET surface area of FeO@AC nps was found to be 129.6 m/g by single point method and 1061.9 m/g by multipoint method. Adsorption experiments were performed to optimize the effect of process conditions such as pH of solution, nanoparticles dose, temperature, concentration of dye and contact time on contaminant removal. The maximum uptake capacity of FeO@AC was found to be 138 and 166.6 mg/g for methylene blue and brilliant green dyes, respectively. In order to assess dye adsorption behaviour, adsorption isotherm models viz., Langmuir, Freundlich and Temkin were applied to the data. Langmuir isotherm best fitted [R = 0.993 (MB) and R = 0.920 (BG)] to the experimental data of both the dyes. Further, Pseudo-second order rate equation fitted better to the experimental data. Reuse potential of the nanoparticles was also investigated for the removal of both the dyes and it is inferred from the data that the synthesised nanoadsorbent has promising reuse potential, therefore can be used for several cycles.
本研究采用负载 FeO 的活性炭纳米粒子从模拟废水中去除阳离子染料。FeO@AC 纳米粒子采用共沉淀法合成。采用不同技术对 FeO@AC 纳米粒子进行了表征，数据表明合成的纳米粒子直径为 6-16nm。FeO@AC 纳米粒子的 pHpzc 为 7.8。单点法和多点法分别测定 FeO@AC 纳米粒子的 BET 比表面积为 129.6m/g 和 1061.9m/g。进行了吸附实验以优化过程条件对污染物去除的影响，如溶液的 pH 值、纳米粒子剂量、温度、染料浓度和接触时间。FeO@AC 的最大吸附容量分别为 138 和 166.6mg/g，用于亚甲蓝和亮绿染料。为了评估染料吸附行为，应用了吸附等温线模型，如 Langmuir、Freundlich 和 Temkin 对数据进行拟合。Langmuir 等温线模型（MB）和 Freundlich 等温线模型（BG）对两种染料的实验数据拟合最好。此外，准二级速率方程更符合实验数据。还研究了纳米粒子对两种染料的重复使用潜力，从数据中推断出合成的纳米吸附剂具有良好的重复使用潜力，因此可以用于多个循环。
