Materials Technology Research Group (MaTReC), School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia.
Int J Biol Macromol. 2023 Apr 1;233:123535. doi: 10.1016/j.ijbiomac.2023.123535. Epub 2023 Feb 4.
The present study intended to develop efficient hydrogel spheres in treating simulated wastewater contaminated with p-chlorophenol. Herein, copper-modified nanocellulose was grafted onto alginate to produce eco-friendly hydrogel spheres to utilize as a viable biosorbent. Fabricated spheres were characterized through scanning electron microscopy, thermogravimetry, surface area measurement, point of zero charge and zeta potential analyses. The adsorption of p-chlorophenol was optimized by altering various experimental conditions. Pseudo second order kinetics and Langmuir adsorption isotherm best described the adsorption of p-chlorophenol onto copper-modified cellulose nanocrystal-based spheres. The maximum adsorption capacity was 66.67 mg g with a reusability up to five regeneration cycles. The thermodynamic study directed that p-chlorophenol adsorption was exothermic, spontaneous, and reversible within the analyzed temperature range. Weber-Morris model revealed that intraparticle diffusion was not the singular rate-controlling step in the adsorption process. Hence, copper-modified nanocellulose spheres could be employed as a sustainable and effective biosorbent for p-chlorophenol adsorption from wastewater.
本研究旨在开发高效的水凝胶球，用于处理模拟废水中受污染的对氯苯酚。在此，将铜改性纳米纤维素接枝到海藻酸钠上，制备出环保型水凝胶球，用作可行的生物吸附剂。通过扫描电子显微镜、热重分析、比表面积测量、零电荷点和zeta 电位分析对制备的水凝胶球进行了表征。通过改变各种实验条件来优化对氯苯酚的吸附。准二级动力学和 Langmuir 吸附等温线很好地描述了对氯苯酚在铜改性纤维素纳米晶球上的吸附。最大吸附容量为 66.67mg/g，可重复使用多达五个再生循环。热力学研究表明，对氯苯酚的吸附是在分析温度范围内的放热、自发和可逆过程。Weber-Morris 模型表明，在吸附过程中，颗粒内扩散不是唯一的速率控制步骤。因此，铜改性纳米纤维素球可用作从废水中吸附对氯苯酚的可持续和有效生物吸附剂。
