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以水葫芦为原料，通过马弗炉煅烧法制备水葫芦基活性炭，并系统研究其对废水中Cr(Ⅵ)的吸附性能。通过优化投加量、初始浓度、反应时间和反应温度等关键参数，确定最佳吸附条件：投加量为5 g·L-1,初始浓度为10 mg·L-1,吸附时间为30 min,反应温度为30℃,此条件下Cr(Ⅵ)的去除率为最优达99.9%。样品的吸附符合Langmuir等温模型，表明吸附过程以单分子层吸附为主，该吸附过程为自发的吸热反应，活化能为5.23 kJ·mol-1。且通过准二级动力学方程对实验数据的拟合结果显示出较高的相关性，该吸附过程主要由化学吸附机制主导。
Abstract：In this study, water hyacinth was employed as a raw material to prepare water hyacinth-based activated carbon via muffle furnace calcination. The adsorption performance of water hyacinth-based activated carbon for Cr(Ⅵ) in wastewater was systematically investigated. By optimizing the key parameters such as dosage, initial concentration, reaction time, and reaction temperature, the study determined the optimal adsorption conditions as follows: a dosage of 5 g·L-1, an initial Cr(Ⅵ) concentration of 10 mg·L-1, a reaction time of 30 minutes, and a reaction temperature of 30 ℃. Under these conditions, the removal rate of Cr(Ⅵ) reached a maximum of 99.9%. The adsorption process followed the Langmuir isotherm model, indicating that it primarily involved monolayer adsorption. Thermodynamic analysis demonstrated that the adsorption process was spontaneous and endothermic, with an activation energy of 5.23 kJ·mol-1. Furthermore, the fitting results of the experimental data through the pseudo-second-order kinetic equation showed a high correlation and suggested that the adsorption process was dominated by chemical adsorption mechanisms.
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基本信息:
DOI：10.19977/j.cnki.jfpnu.20250070
中图分类号:TQ424.1;X703
引用信息:
[1]杨文卿,卓倩,涂木兰,等.水葫芦基活性炭对废水中Cr(Ⅵ)的吸附研究[J].福建技术师范学院学报,2025,43(05):32-38.DOI:10.19977/j.cnki.jfpnu.20250070.
基金信息:
福建省引导性项目(2024N01010177)