Department of Medical Biotechnology and Integrative Physiology, Institute of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, 602 105, India.
Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, India.
Environ Res. 2022 Dec;215(Pt 3):114317. doi: 10.1016/j.envres.2022.114317. Epub 2022 Sep 26.
In the current research work, the activated carbon synthesized from the plant species Delonix regia is doped with iron oxide nanoparticles and enforced as a nanosorbent for the effective extermination of Tartrazine (TAR) and Methylene blue (MB) dyes. This nanosorbent is prepared from the bark powder of the Delonix regia and subjected to chemical activation; Furthermore, the synthesized biosorbent were characterized using FTIR, SEM, TGA, and XRD to understand their functional properties and structural morphology. The optimum effectiveness adsorption of Tartrazine and Methylene blue has been investigated by using different key parameters. The conclusions have shown the highest removal percentage at a pH of 3 and 6 for Tartrazine and Methylene blue, respectively. For the various initial concentrations, the adsorption percentage reached equilibrium after 60 min and 90 min for TAR and MB. The adsorption equilibrium values were applied to various isotherms models. The adsorbent showed a higher removal capacity of 357.142 mg g and 147.058 mg g and for MB and TAR respectively. The kinetic data were best fits to pseudo second order model. The thermodynamic parameters indicated that this adsorption process was found to be spontaneous, exothermic and feasible at different temperatures. These results have shown that the prepared adsorbent is an environmentally friendly and suitable material for the elimination of TAR and MB from water systems.
在当前的研究工作中，使用铁氧化物纳米粒子掺杂从植物物种无忧花合成的活性炭，并将其强化为纳米吸附剂，以有效消灭食用柠檬黄（TAR）和亚甲蓝（MB）染料。这种纳米吸附剂是用无忧花的树皮粉末制备的，并经过化学活化；此外，通过 FTIR、SEM、TGA 和 XRD 对合成的生物吸附剂进行了表征，以了解其功能特性和结构形态。通过使用不同的关键参数研究了食用柠檬黄和亚甲蓝的最佳有效吸附效果。结论表明，食用柠檬黄和亚甲蓝的最佳去除率分别在 pH 值为 3 和 6 时达到最高。对于不同的初始浓度，TAR 和 MB 的吸附百分比在 60 分钟和 90 分钟后达到平衡。吸附平衡值适用于各种等温线模型。该吸附剂对 MB 和 TAR 的去除容量分别高达 357.142 mg/g 和 147.058 mg/g。动力学数据最符合伪二级模型。热力学参数表明，该吸附过程在不同温度下是自发的、放热的和可行的。这些结果表明，所制备的吸附剂是一种环保且适合从水系统中去除 TAR 和 MB 的材料。
