Bayça Feray
Alanya Alaaddin Keykubat University, Rafet Kayis Engineering Faculty, Department of Engineering Basic Science, 07450, Alanya, Antalya, Turkiye.
Heliyon. 2024 Nov 28;11(1):e40743. doi: 10.1016/j.heliyon.2024.e40743. eCollection 2025 Jan 15.
Removal of Rhodamine B (RhB) from aqueous solutions was performed by the batch adsorption process. Colemanite was characterized as an adsorbent by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD) and X-Ray Fluorescence (XRF). The effects of contact time, the effect of the initial concentration of the dye, the amount of adsorbent and temperature parameters on the removal of RhB were investigated. Equilibrium adsorption data of RhB on colemanite were analyzed using the Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. It was found that the isotherm that showed the highest correlation with experimental data was the Langmuir isotherm. Using the Langmuir isotherm, the theoretical adsorption capacity was calculated as 42.02 mg/g. Adsorption kinetics were analyzed with Pseudo-First-Order, Pseudo-Second-Order and Intraparticle diffusion models. As a result of the calculations, it was determined that the most appropriate kinetic model was the Pseudo-Second-Order kinetic model. Thermodynamic studies have shown that adsorption is a physical, non-spontaneous, exothermic process in which randomness at the solid-liquid interface decreases. According to the results obtained, it can be said that colemanite can be used as a suitable adsorbent in the removal of Rhodamine B dye from wastewater.
通过间歇吸附法从水溶液中去除罗丹明B（RhB）。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）和X射线荧光（XRF）对硬硼钙石作为吸附剂进行了表征。研究了接触时间、染料初始浓度、吸附剂用量和温度参数对RhB去除率的影响。采用朗缪尔、弗伦德里希和杜宾宁-拉杜舍维奇等温线模型分析了RhB在硬硼钙石上的平衡吸附数据。结果发现，与实验数据相关性最高的等温线是朗缪尔等温线。利用朗缪尔等温线，计算出理论吸附容量为42.02 mg/g。用拟一级、拟二级和颗粒内扩散模型分析了吸附动力学。计算结果表明，最合适的动力学模型是拟二级动力学模型。热力学研究表明，吸附是一个物理的、非自发的、放热的过程，其中固液界面的随机性降低。根据所得结果，可以说硬硼钙石可作为从废水中去除罗丹明B染料的合适吸附剂。
