In this paper, adsorption of Congo red (CR) onto L-cysteine decorated with reduced graphene oxide/polyaniline composite at room temperature was investigated. The morphology and structure properties of as-prepared nanocomposite were verified by UV–visible spectroscopy (UV–visible), powder X-ray diffraction (XRD), Fourier transform infrared spectrophotometry (FTIR), scanning electron microscopy (SEM), and Brunauer Emmett Teller (BET) studies. Effect ofabsorbent dosage, contact time, initial dye concentration and temperature were studied and optimal conditions for the adsorption process of Congo red dye were found. The obtained results indicated that isotherms data fitted well to Langmuir model. While kinetics data fitted well to the pseudo-second-order kinetic equation and the adsorption process was generally governed via intra-particle diffusion. Thermodynamic data showed that adsorption process of CR was endothermic and spontaneous in nature. At optimal conditions, the maximum adsorption capacity of CR was calculated and found to be 56.57 mg/g, which shows that L-cysteine functionalized reduced graphene oxide/polyaniline based nanocomposite can be efficiently used for wastewater management.

本文研究了刚果红（CR）在室温下吸附到还原型氧化石墨烯/聚苯胺复合材料装饰的L-半胱氨酸上的过程。制备的纳米复合材料的形态和结构特性通过紫外可见光谱（UV可见），粉末X射线衍射（XRD），傅里叶变换红外分光光度法（FTIR），扫描电子显微镜（SEM）和Brunauer Emmett进行了验证。柜员（BET）研究。研究了吸附剂用量，接触时间，染料初始浓度和温度的影响，为刚果红染料的吸附工艺找到了最佳条件。获得的结果表明等温线数据非常适合Langmuir模型。虽然动力学数据很好地拟合了伪二级动力学方程，但吸附过程通常是通过颗粒内扩散来控制的。热力学数据表明，CR的吸附过程是吸热的，自然而然的。在最佳条件下，计算得出的CR的最大吸附容量为56.57 mg / g，这表明L-半胱氨酸官能化的还原氧化石墨烯/聚苯胺基纳米复合材料可以有效地用于废水处理。