Adsorption has proven to be a cost-effective option for treating wastewater containing dyes and other pollutants, as it is a simple and low-cost technique. In this work, cellulose nanocrystals (CNCs) were extracted from sugarcane bagasse using the acid hydrolysis technique and used as an effective adsorbent for removing methylene blue dye. The chemistry behind the segregation of cellulose nanocrystals from sugarcane bagasse and its adsorption of methylene blue dye from textile wastewater has been discussed. The obtained nanocrystals were characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy, X-ray diffraction (XRD), and thermos gravimetric analysis (TGA). The dye solution was subjected to extracted CNC, observed the dye absorption capacity, and found that the absorbance of the dye solution after treatment was decreased compared to the stock solution. With an increase in treatment time from 30 to 90 min, there was a rapid decrease in absorbency values obtained through UV spectroscopy.

吸附已被证明是处理含有染料和其他污染物的废水的一种经济有效的选择，因为它是一种简单且低成本的技术。在这项工作中，使用酸水解技术从甘蔗渣中提取纤维素纳米晶体 (CNC)，并将其用作去除亚甲基蓝染料的有效吸附剂。讨论了从甘蔗渣中分离纤维素纳米晶体的化学过程及其从纺织废水中吸附亚甲基蓝染料的过程。通过傅里叶变换红外光谱（FTIR）、紫外-可见光谱、X射线衍射（XRD）和热重分析（TGA）对所获得的纳米晶体进行了表征。对染料溶液进行萃取CNC，观察染料吸收能力，并发现处理后染料溶液的吸光度与原液相比有所降低。随着处理时间从 30 分钟增加到 90 分钟，通过紫外光谱获得的吸光度值迅速下降。