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Fabrication of sulfur-doped biochar derived from tapioca peel waste with superior adsorption performance for the removal of Malachite green and Rhodamine B dyes
Surfaces and Interfaces ( IF 6.2 ) Pub Date : 2021-01-03 , DOI: 10.1016/j.surfin.2020.100920
Sivakumar Vigneshwaran , Palliyalil Sirajudheen , Perumal Karthikeyan , Sankaran Meenakshi

The rapid industrialization and explosion of the population result in increased usage of water and its consequent discarding causes environmental pollution. The biochar based materials are effectively employed for the removal of dyes from contaminated water. However, the pristine biochar shows less efficiency towards dye adsorption in practical applications. Herein, sulfur tethered adsorbent of Tapioca peel (S@TP) biochar was successfully fabricated and utilized for the removal of organic dyes such as Malachite Green (MG) and Rhodamine B (RhB) from water. The peel of tapioca was used as a precursor for the biochar preparation. The isotherm analysis demonstrates that the S@TP biochar has the adsorption efficiency of 30.18 and 33.10 mg/g for MG and RhB dye molecules, respectively. 25 mg/L concentration of 50 mL dye solutions were used for the adsorption study. The maximum adsorption was observed at a pH range ~8, and the adsorption attained saturation within 120 min. The adsorption followed the pseudo-second-order kinetics, and the adsorption process was composed of the Freundlich isotherm model. The newly fabricated adsorbent could be utilized as a capable adsorbent for the water/wastewater treatment process. The newly fabricated bio-mass could be visualized as a capable adsorbent for water/wastewater treatment process since the S@TP matrix possesses high removal and reusable efficiency towards dye molecules.



中文翻译:

以木薯皮废料为原料制备的硫掺杂生物炭具有优异的吸附性能,可去除孔雀石绿和若丹明B染料

快速的工业化和人口爆炸导致水的使用增加,随之而来的丢弃会造成环境污染。基于生物炭的材料有效地用于从受污染的水中去除染料。然而,原始生物炭在实际应用中显示出较少的染料吸附效率。在此,木薯皮(S @ TP)生物炭的硫束缚吸附剂被成功制备,并用于从水中去除有机染料,如孔雀石绿(MG)和若丹明B(RhB)。木薯皮用作生物炭制备的前体。等温线分析表明,S @ TP生物炭对MG和RhB染料分子的吸附效率分别为30.18和33.10 mg / g。25 mg / L浓度的50 mL染料溶液用于吸附研究。在〜8的pH范围内观察到最大吸附,并且在120分钟内吸附达到饱和。吸附遵循拟二级动力学,吸附过程由Freundlich等温模型组成。新制造的吸附剂可以用作水/废水处理过程中的有效吸附剂。由于S @ TP基质对染料分子具有很高的去除率和可重复使用的效率,因此可以将新制造的生物质可视为水/废水处理过程的有效吸附剂。吸附过程由Freundlich等温模型组成。新制造的吸附剂可以用作水/废水处理过程中的有效吸附剂。由于S @ TP基质对染料分子具有很高的去除率和可重复使用的效率,因此可以将新制造的生物质可视为水/废水处理过程的有效吸附剂。吸附过程由Freundlich等温模型组成。新制造的吸附剂可以用作水/废水处理过程中的有效吸附剂。由于S @ TP基质对染料分子具有很高的去除率和可重复使用的效率,因此可以将新制造的生物质可视为水/废水处理过程的有效吸附剂。

更新日期:2021-01-21
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