期刊
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
卷 25, 期 2, 页码 146-160出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15226514.2022.2064817
关键词
Adsorption; dragon fruit peel; mechanism; regeneration; rhodamine B
In this study, carboxylate-functionalized dragon fruit peel powder (CF-DFPP) was prepared using a simple and low-toxicity chemical treatment. The CF-DFPP exhibited a high adsorption capacity for Rhodamine B (RhB) in aqueous solution. The Langmuir isotherm and PSO kinetic models accurately described the experimental data. The CF-DFPP showed excellent desorption efficiency and could be effectively regenerated after multiple cycles.
In this study, we used a simple and low-toxicity chemical treatment to make a carboxylate-functionalized dragon fruit peel powder (CF-DFPP) from dragon fruit peel to improve its capacity for adsorbing Rhodamine B (RhB) from an aqueous medium. Field Emission-Scanning Electron Microscopy/Energy-Dispersive X-ray (FE-SEM/EDX), point of zero charges (pH(PZC)), Brunauer-Emmett-Teller (BET), and Fourier Transform Infrared (FT-IR) analyses were performed to characterize the adsorbent materials. The adsorption performance and mechanism for the removal of RhB were examined. The kinetic, isotherm and thermodynamic parameters were employed to evaluate the adsorption mechanism. Compared to other models, the Langmuir isotherm and PSO kinetic models better defined the experimental data. CF-DFPP adsorbent exhibited a maximum adsorption efficiency of 228.7 mg/g at 298 K for RhB adsorption. Thermodynamic analysis revealed that the adsorption of RhB by CF-DFPP was spontaneous (Delta G(o) < 0) and exothermic (Delta H-o < 0) nature of the process. Different eluting agents were used in desorption tests, and NaOH was revealed to have greater desorption efficiency (96.8%). Furthermore, regeneration examinations revealed that the biosorbent could effectively retain RhB, even after six adsorption/desorption cycles. These findings demonstrated that the CF-DFPP might be a novel material for removing RhB from an aqueous medium.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据