Department of Civil and Environmental Engineering, Federal University of Santa Maria, UFSM, Santa Maria, Brasil.
Department of Civil and Environmental Engineering, Universidad de la Costa, CUC, Calle 58 # 55-66, Barranquilla, Atlántico, Colombia.
Environ Manage. 2023 Apr;71(4):795-808. doi: 10.1007/s00267-022-01716-6. Epub 2022 Sep 10.
In this study, the residual pods of the forest species Erythrina speciosa were carbonized with ZnCl to obtain porous activated carbon and investigated for the adsorptive removal of the drug paracetamol (PCM) from water. The PCM adsorption onto activated carbon is favored at acidic solution pH. The isothermal studies confirmed that increasing the temperature from 298 to 328 K decreased the adsorption capacity from 65 mg g to 50.4 mg g (C = 175 mg L). The Freundlich model showed a better fit of the equilibrium isotherms. Thermodynamic studies confirmed the exothermic nature (ΔH = -39.1066 kJ mol). Kinetic data indicates that the external mass transfer occurs in the first minutes followed by the surface diffusion, considering that the linear driving force model described the experimental data. The application of the material in the treatment of a simulated effluent with natural conditions was promising, presenting a removal of 76.45%. Therefore, it can be concluded that the application of residual pods of the forest species Erythrina speciosa carbonized with ZnCl is highly efficient in the removal of the drug paracetamol and also in mixtures containing other pharmaceutical substances.
在这项研究中，用 ZnCl 对森林物种刺桐的残余豆荚进行碳化，得到多孔活性炭，并研究其对水中药物扑热息痛（PCM）的吸附去除效果。PCM 在酸性溶液 pH 下更有利于吸附到活性炭上。等温研究证实，将温度从 298 升高到 328 K 会使吸附容量从 65 mg g 降低到 50.4 mg g（C=175 mg L）。Freundlich 模型对平衡等温线的拟合更好。热力学研究证实了该过程是放热的（ΔH=-39.1066 kJ mol）。动力学数据表明，在最初的几分钟内发生了外部传质，随后是表面扩散，这考虑到线性驱动力模型可以描述实验数据。该材料在处理含有天然条件的模拟废水时的应用很有前景，去除率达到了 76.45%。因此，可以得出结论，用 ZnCl 碳化森林物种刺桐的残余豆荚在去除扑热息痛方面非常有效，在含有其他药物物质的混合物中也很有效。
