Lignocellulosic biosorbents for wastewater treatment are generally powders. However, powdered biosorbents require the time and energy taken up in grinding and sieving. In this work, lignocellulosic biosorbents were prepared in fiber form from lemongrass leaf (LGL), through a simple, green procedure using various chemical treatment conditions. Scanning electron microscopy (SEM) revealed the reduced diameter of treated fibers and thermogravimetric analysis (TGA) revealed increased thermal stability due to the partial elimination of lignin and hemicellulose. Based on the eco-friendly preparation and adsorption capacity, the most suitable fibrous biosorbent for dye adsorption was LGL treated with 5 wt% NaOH (TLGL5). The Langmuir isotherm model indicated maximum adsorption capacities of TLGL5 toward crystal violet (CV) and methylene blue (MB) of 76.92 mg g⁻¹ and 35.84 mg g⁻¹, respectively. CV and MB uptake by TLGL5 were compatible with the pseudo-second order model. Thermodynamic study indicated a spontaneous and endothermic adsorption reaction for both dyes. Using an aqueous acetic acid desorption solution, TLGL5 could be used for four adsorption–desorption cycles. Based on these findings, TLGL5 is a viable alternative adsorbent for the removal of dye from textile effluent.

用于废水处理的木质纤维素生物吸附剂通常为粉末。但是，粉状生物吸附剂需要大量的时间和精力进行研磨和筛分。在这项工作中，通过使用各种化学处理条件的简单，绿色程序，从柠檬草叶（LGL）以纤维形式制备了木质纤维素生物吸附剂。扫描电子显微镜（SEM）显示出处理过的纤维直径减小，热重分析（TGA）显示出由于部分消除了木质素和半纤维素而提高了热稳定性。基于环保的制备和吸附能力，最适合染料吸附的纤维状生物吸附剂是用5 wt％NaOH（TLGL5）处理的LGL。Langmuir等温线模型显示TLGL5对76的结晶紫（CV）和亚甲基蓝（MB）的最大吸附容量。^-1和35.84 mg g ^-1。TLGL5吸收的CV和MB与伪二级模型兼容。热力学研究表明两种染料的自发吸热吸附反应。使用醋酸水溶液的解吸溶液，TLGL5可用于四个吸附-解吸循环。基于这些发现，TLGL5是一种可行的替代吸附剂，用于从纺织废水中去除染料。