Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Int J Biol Macromol. 2020 Aug 1;156:762-772. doi: 10.1016/j.ijbiomac.2020.04.100. Epub 2020 Apr 18.
A novel biosorbent from lemongrass leaf fibers incorporated with cellulose acetate (TLGL-CA) was prepared and its properties and adsorption capacity toward crystal violet (CV) were investigated. The good adhesion between TLGL and CA in TLGL-CA sheet was revealed by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier Transform Infrared Spectroscopy (FTIR), and tensile properties. The potential of the biosorbent for CV adsorption was indicated by its high swelling capacity and the presence of functional groups of lignocellulose. Adsorption results obtained at different contact times and initial CV concentrations fitted well with the pseudo-second order model. The adsorption data at equilibrium were well described by the Langmuir isotherm model and the maximum monolayer adsorption capacity was 36.10 mg g at 25 °C. In the desorption study, five adsorption-desorption cycles of CV were successfully repeated with TLGL-CA sheet, using acetic acid as the desorbing agent. Based on the study results, it was concluded that the developed biosorbent is effective, inexpensive, and convenient to use for the removal of cationic dye in wastewater.
一种新型的生物吸附剂，由香茅叶纤维与醋酸纤维素（TLGL-CA）复合而成，并对其性质和对结晶紫（CV）的吸附能力进行了研究。扫描电子显微镜（SEM）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）和拉伸性能表明，TLGL-CA 片层中 TLGL 和 CA 之间具有良好的附着力。生物吸附剂具有较高的溶胀能力和木质纤维素的官能团，表明其对 CV 的吸附潜力。在不同的接触时间和初始 CV 浓度下，吸附结果均符合准二级动力学模型。吸附平衡数据很好地符合 Langmuir 等温吸附模型，在 25°C 时的最大单层吸附容量为 36.10 mg/g。在解吸研究中，使用乙酸作为解吸剂，TLGL-CA 片成功地重复了五次 CV 的吸附-解吸循环。基于研究结果，可得出结论，所开发的生物吸附剂是一种有效、廉价且方便的用于去除废水中阳离子染料的方法。
