Zhang Xu, Shu Xin, Zhou Xiaolin, Zhou Cheng, Yang Pu, Diao Muhe, Hu Haiyang, Gan Xinyu, Zhao Chen, Fan Chunzhen
Dongguan Environmental Protection Industry Promotion Centre, Sheng'an Building, Middle Section of Hongwei 2nd Road, Dongguan, 523070, People's Republic of China.
School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China.
Environ Sci Pollut Res Int. 2023 Jan;30(2):3659-3667. doi: 10.1007/s11356-022-22474-2. Epub 2022 Aug 11.
Organics and heavy metals are common pollutants in many wastewaters and water bodies. Adsorption processes by magnetic materials can rapidly remove these pollutants from water and effectively recycle adsorbent. In this study, magnetic analyzer, X-ray diffraction, Flourier transform infrared spectroscopy, and granulometry were used to characterize the synthesized magnetic reed biochar materials (ZnFeO/biochar). Influences of adsorption time, pH, temperature, initial solution concentration, and adsorption equilibrium concentration on adsorption performances were investigated for Cu and phenol adsorption by ZnFeO/biochar. Adsorption kinetic and isotherm models were used to describe the adsorption processes. Adsorption of phenol and Cu by ZnFeO/biochar reached saturation within 45 min and increased slightly with the increase of temperature from 15 to 45 °C. Adsorption of Cu increased with the increase of pH, while the adsorption of phenol peaked at pH = 6. The adsorption processes fit the pseudo-second order kinetics model, and both conformed to the Langmuir model. The fitting results show that the maximum single-component adsorption capacity of phenol and Cu by ZnFeO/biochar is 63.29 and 12.20 mg/g, and the maximum bi-component adsorption capacity reaches 40.16 and 9.48 mg/g, respectively. All the findings demonstrate that ZnFeO/biochar has good adsorption performance for phenol and Cu.
有机物和重金属是许多废水和水体中的常见污染物。磁性材料的吸附过程可以快速从水中去除这些污染物，并有效地回收吸附剂。在本研究中，使用磁性分析仪、X射线衍射、傅里叶变换红外光谱和粒度分析对合成的磁性芦苇生物炭材料（ZnFeO/生物炭）进行表征。研究了吸附时间、pH值、温度、初始溶液浓度和吸附平衡浓度对ZnFeO/生物炭吸附Cu和苯酚性能的影响。采用吸附动力学和等温线模型描述吸附过程。ZnFeO/生物炭对苯酚和Cu的吸附在45分钟内达到饱和，并随着温度从15℃升高到45℃而略有增加。Cu的吸附量随pH值的升高而增加，而苯酚的吸附量在pH = 6时达到峰值。吸附过程符合准二级动力学模型，且均符合Langmuir模型。拟合结果表明，ZnFeO/生物炭对苯酚和Cu的最大单组分吸附容量分别为63.29和12.20 mg/g，最大双组分吸附容量分别达到40.16和9.48 mg/g。所有结果表明，ZnFeO/生物炭对苯酚和Cu具有良好的吸附性能。
