In the current study, Thunbergia grandiflora (Bengal clock vine) leaf extract has been used as green-resource to prepare Fe₃O₄ nanoparticles. SEM image showed agglomerated spherical (25 nm) particles, and EDS ascertained the existence of elemental iron (between 6 – 7 k eV) and oxygen (at 0.5 keV). XRD and XPS designated signature peaks for Fe₃O₄. BET studies revealed a high specific surface area of 114.42 m²/g with mesoporous structure. FTIR showed the distinct band for iron-oxide at 542 cm⁻¹. A very low coercivity (1.5812 Oe) and retentivity (2.216 memu/g) indicated the paramagnetic properties of Fe₃O₄ nanoparticles. Batch adsorption of Acid blue 113 considering several factors conceded 95% removal within 3.5 h of contact time at pH 2 with the adsorbent dosage of 1 g/L, the concentration of 25 mg/L, 150 rpm, and the temperature of 303 K. The pseudo-second-order equation was best suited for the adsorption data indicating chemisorption. Freundlich isotherm model indicated a good fit for the equilibrium data. Thermodynamic parameters indicated exothermicity and spontaneity of the adsorption process. The maximum sorption capacity gained under an optimized environment was 138.89 mg/g. Hence, this study convincingly recognized the feasibility of the green synthesized Fe₃O₄ adsorbent for efficient Acid blue 113 dye removal with a suggestively greater sorption capacity.

在当前的研究中，大花紫茎泽兰（孟加拉时钟藤）叶提取物已被用作制备Fe ₃ O ₄纳米颗粒的绿色资源。SEM图像显示了团聚的球形（25 nm）颗粒，EDS确定了元素铁（6 – 7 k eV之间）和氧气（0.5 keV）的存在。XRD和XPS指定了Fe ₃ O _4的特征峰。BET研究显示具有介孔结构的高比表面积为114.42 m ² / g。FTIR在542cm ^-1处显示出明显的氧化铁带。极低的矫顽力（1.5812 Oe）和保持力（2.216 memu / g）表明Fe ₃ O ₄的顺磁性能纳米粒子。考虑到几个因素，酸性蓝113的批量吸附在pH 2的接触时间内3.5小时内以1 g / L的吸附剂量，25 mg / L的浓度，150 rpm的吸附温度和303 K的温度进行了95％的去除。拟二阶方程最适合表示化学吸附的吸附数据。Freundlich等温线模型表明非常适合平衡数据。热力学参数表明了吸附过程的放热性和自发性。在最佳环境下获得的最大吸附容量为138.89 mg / g。因此，该研究令人信服地认识到绿色合成的Fe ₃ O ₄吸附剂可有效去除酸性蓝113染料并具有更大的吸附能力的可行性。