In recent years, different biomaterials have garnered more research attention due to their usefulness as adsorbents. The present study focuses on a chemical treatment process to improve the adsorption capacity of betel nut husk fibers for a textile effluent (methylene blue). The fibers of chemically modified material were assessed using Fourier transform infrared (FTIR) spectrometer and Brunauer–Emmett–Teller (BET) analyzer to determine the existing surface functional groups and surface area, respectively. Parameters including contact time, dye concentration, temperature, effects of pH and desorption efficiency were also evaluated to identify optimum adsorption performance. Adsorption followed the Freundlich isotherm model and pseudo-first-order kinetics, indicating physisorption was responsible for adsorption and its occurrence on multilayers. Adsorption capacity was 149.921 mg/g, 149.874 mg/g and 145.462 mg/g at 30, 40 and 50, respectively, and was best at 30 °C. ΔH° was found to be − 1.494 which suggests adsorption is exothermic in nature and thus satisfying the findings that the physical process of adsorption took place in this study.

近年来，不同的生物材料由于其作为吸附剂的用途而引起了更多的研究关注。本研究的重点是化学处理工艺，以提高槟榔壳纤维对纺织废水（亚甲基蓝）的吸附能力。使用傅立叶变换红外（FTIR）光谱仪和Brunauer-Emmett-Teller（BET）分析仪评估化学改性材料的纤维，分别确定现有的表面官能团和表面积。还评估了包括接触时间，染料浓度，温度，pH值和解吸效率的参数，以确定最佳的吸附性能。吸附遵循Freundlich等温模型和伪一级动力学，表明物理吸附是吸附及其在多层膜上发生的原因。在30、40和50时的吸附容量分别为149.921 mg / g，149.874 mg / g和145.462 mg / g，在30°C时最佳。Δ发现H °为-1.494，这表明吸附本质上是放热的，因此满足了本研究中发生吸附物理过程的发现。