吸附
锆
材料科学
壳聚糖
复合数
核化学
热液循环
碳纤维
化学工程
朗缪尔吸附模型
复合材料
化学
冶金
有机化学
工程类
作者
Jingran Li,Junjie Su,Qi Yang,Zhilin Yang
标识
DOI:10.1016/j.matchemphys.2023.128057
摘要
In this study, zirconium-doped carbon shell-protected magnetic Fe3O4 composite (Zr–Fe3O4@C) was synthesized by hydrothermal method with chitosan assistance. Chitosan as a stabilizer successfully prevented the aggregation of Fe3O4, resulting in approximately a 30.7% increase in the specific surface area of Zr–Fe3O4@C. TEM analysis revealed that Zr–Fe3O4@C exhibited a relatively uniform square shape with a size of about 120 nm. The synergistic effect between iron and zirconium oxides resulted in a nearly 20% increase in the adsorption capacity of Zr–Fe3O4@C (Fe/Zr molar ratio of 3:1) for Cr(VI) compared to Fe3O4. The introduction of zirconium also significantly improved the acid and base resistance (1–9) and environmental adaptability of Zr–Fe3O4@C composites. With good magnetic properties (53.5 emu/g) and separation recycling properties, Zr–Fe3O4@C showed rapid water separation within 20 s. At a pH of 3 and 30 °C, Zr–Fe3O4@C achieved a maximum adsorption capacity of 132.72 mg/g by the Langmuir isotherm. Furthermore, even after six consecutive treatments, the adsorption performance of Zr–Fe3O4@C for Cr(VI) only decreased by about 9.8%. The stable adsorption performance and regeneration ability suggested that Zr–Fe3O4@C would be considered a reliable candidate for Cr(VI) wastewater remediation.
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