Department of Chemical Engineering, Sathyabama Institute of Science and Technology, India.
Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Tamilnadu, India.
Chemosphere. 2021 Dec;284:131249. doi: 10.1016/j.chemosphere.2021.131249. Epub 2021 Jun 24.
Adsorbents originated from biological materials play a vital role in the remediation of diverse toxic pollutants due to their high efficacy, low cost and being environmentally friendly. The present study focusses on the palm shell activated carbon obtained from agricultural waste precursor (palm shell) with the aid of oleic acid activation along with ultrasonic assistance and its effective utilization for acenaphthene adsorption from aqueous and real effluent. The synthesized Ultrasonic assisted palm shell activated carbon (UAC) possessed high surface area of 506.84 m/g and distinct porous structure as depicted by SEM analysis. The outcomes of zero discharge analyses and acenaphthene adsorption results vouchsafed that, using oleic acid as an effective catalyst, is explicitly advantageous to combine with ultrasonic assistance to fabricate a highly efficient adsorbent for acenaphthene removal from aqueous solution. The UAC obtained at the selected parameters levels, such as temperature of 45 °C and ultrasonic time of 40 min, has the adsorption capacity of 52.745 mg/g. Sips isotherm model computed from the experimental data gave the best fit among the examined isotherm models. To complete the study of adsorption properties of UAC towards acenaphthene, kinetic modeling and thermodynamic aspects of the adsorption process were also scrutinized. The kinetic studies proved that pseudo-second order model is compatible with the experimental data and thermodynamic results revealed that the adsorption process is of endothermic nature. Overall, ultrasonic-assisted preparation of activated carbon from palm shell actuated using Oleic acid was found to be a highly efficient adsorbent which was suitable for acenaphthene removal from aqueous solution.
由于其高效、低成本和环保的特点，源于生物材料的吸附剂在修复多种有毒污染物方面发挥着重要作用。本研究聚焦于由农业废料前体（棕榈壳）经油酸活化、超声辅助制备的棕榈壳活性炭，并将其有效用于水中和实际废水中苊的吸附。所合成的超声辅助棕榈壳活性炭（UAC）具有 506.84 m/g 的高比表面积和明显的多孔结构，这可以通过 SEM 分析得到证明。零排放分析和苊吸附结果表明，使用油酸作为有效的催化剂，与超声辅助相结合具有明显的优势，可制备出高效的吸附剂，用于从水溶液中去除苊。在选定的参数水平下，如 45°C 的温度和 40 分钟的超声时间，获得的 UAC 的吸附容量为 52.745mg/g。从实验数据计算得出的 Sips 等温线模型是所研究的等温线模型中最适合的模型。为了完成 UAC 对苊的吸附性能研究，还对吸附过程的动力学模型和热力学方面进行了研究。动力学研究表明，准二级动力学模型与实验数据相符，热力学结果表明吸附过程是吸热的。总的来说，使用油酸超声辅助制备的棕榈壳活性炭被发现是一种高效的吸附剂，适用于从水溶液中去除苊。
