橡胶果壳（巴西橡胶树）的碳官能化与硅烷试剂及其在亚甲基蓝和结晶紫二元混合物吸附中的应用。
Functionalization of carbon from rubber fruit shells (Hevea brasiliensis) with silane agents and its application to the adsorption of bi-component mixtures of methylene blue and crystal violet.
机构信息
Department of Chemistry, Faculty of Mathematic and Natural Sciences, University of Lampung, Bandar Lampung, 35145, Indonesia.
Department of Electrical Engineering, Faculty of Engineering, University of Lampung, Bandar Lampung, 35145, Indonesia.
出版信息
Environ Sci Pollut Res Int. 2024 Jun;31(28):39994-40007. doi: 10.1007/s11356-023-28031-9. Epub 2023 Jun 9.
In this research, activated carbon was obtained from rubber fruit shells (ACRPs). The obtained activated carbon (ACRPs) was modified by magnetite particle coating and silanization with triethoxyiphenylsilane (TEPS) to produce a new magnetic adsorbent (ACRPs-MS). The affinity of as-prepared adsorbent (ACRPs-MS) toward methylene blue (MB) and crystal violet (CV) dyes was tested in mono-component and bi-component solutions. Structural characterization proves the success of the magnetite coating process and the silanization of ACRPs. In the infrared (IR) spectroscopy spectrum of ACRPs-MS, Si-O-Fe and Si-O-Si bonds were identified, which indicated the presence of magnetite and silane. This is also supported by the elemental composition contained in the energy-dispersive X-ray (EDX) diffractogram. In addition, the presence of the porous structure of the surface of the material and the increase in the specific surface area increase the accessibility of contaminants such as MB and CV dyes to be adsorbed to the ACRPs-MS adsorption site effectively. The experimental results showed that the adsorption of mono-component MB and CV dyes by ACRPs-MS was optimum at pH 8 and an interaction time of 60 min. The adsorption kinetics of mono-component MB and CV dyes by ACRPs-MS tended to follow pseudo-second-order kinetics (PSO) models with PSO rate constant (k) values of 0.198 and 0.993 g mg min, respectively. The adsorption of MB and CV dyes by ACRPs-MS in a bi-component mixture tends to follow the Langmuir isotherm model with adsorption capacity (q) values of 85.060 and 90.504 mg g, respectively. Analysis of adsorption data on the bi-component mixture between MB and CV by ACRPs-MS with the Langmuir isotherm equation for a binary mixture resulted in q of 22.645 × 10 mmol equiv g. ACRPs-MS material can be used repeatedly five times with adsorption ability > 80%. Desorption of MB and CV dyes was carried out using 0.05 M HCl solution. ACRPs-MS material was able to adsorb MB and CV dyes with a large adsorption capacity and could be used in repeated adsorption. Thus, it can be stated that ACRPs-MS can be used as an effective adsorbent for MB and CV dyes, either singly or in a bi-component mixture.
在这项研究中，从橡胶果壳中获得了活性炭（ACRPs）。通过磁铁粒子涂层和三乙氧基苯基硅烷（TEPS）硅烷化对所得活性炭（ACRPs）进行了改性，从而产生了一种新型磁性吸附剂（ACRPs-MS）。在单组分和双组分溶液中测试了制备的吸附剂（ACRPs-MS）对亚甲基蓝（MB）和结晶紫（CV）染料的亲和力。结构表征证明了磁铁矿涂层过程和 ACRPs 硅烷化的成功。在 ACRPs-MS 的红外（IR）光谱中，鉴定了 Si-O-Fe 和 Si-O-Si 键，这表明存在磁铁矿和硅烷。这也得到了能量色散 X 射线（EDX）衍射图中所含元素组成的支持。此外，材料表面多孔结构的存在以及比表面积的增加增加了亚甲基蓝和 CV 染料等污染物被有效吸附到 ACRPs-MS 吸附位的可及性。实验结果表明，ACRPs-MS 对单组分 MB 和 CV 染料的吸附在 pH 8 和 60 min 的相互作用时间下达到最佳状态。ACRPs-MS 对单组分 MB 和 CV 染料的吸附动力学趋于遵循准二级动力学（PSO）模型，PSO 速率常数（k）值分别为 0.198 和 0.993 g mg min。ACRPs-MS 在二元混合物中对 MB 和 CV 染料的吸附倾向于遵循 Langmuir 等温线模型，吸附容量（q）值分别为 85.060 和 90.504 mg g。用 Langmuir 等温线方程分析 ACRPs-MS 对 MB 和 CV 二元混合物吸附数据表明，q 值为 22.645×10 mmol equiv g。ACRPs-MS 材料可以重复使用五次，吸附能力>80%。使用 0.05 M HCl 溶液进行 MB 和 CV 染料的解吸。ACRPs-MS 材料能够吸附具有大吸附容量的 MB 和 CV 染料，并可用于重复吸附。因此，可以说 ACRPs-MS 可作为 MB 和 CV 染料的有效吸附剂，无论是单独使用还是在双组分混合物中使用。
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