Environmental Protection Technologies Department, Vocational School of Bozova, University of Harran, Sanliurfa, Turkey.
Biology Department, Faculty of Arts and Science, University of Sinop, Sinop, Turkey.
Int J Phytoremediation. 2022;24(12):1243-1250. doi: 10.1080/15226514.2021.2025039. Epub 2022 Jan 11.
The biowaste left over from the fixed oil biorefinery process of L. plant was used as a new biosorbent for the biosorption of synthetic dye of methylene blue from water environment in this study. The main variables of biosorption operation such as methylene blue concentration, time, pH, and biosorbent amount were optimized by the batch-type experiments. The characterization, kinetics, equilibrium, and thermodynamics works were conducted to show the nature of methylene blue biosorption. The studies of Fourier transform infrared spectroscopy and Scanning electron microscopy indicated that the biosorbent possessed an inhomogeneous surface morphology including many cavities and protuberances, and a rich functional group profile. The optimum values of operating variables studied for the biosorption of methylene blue were determined as methylene blue concentration of 15 mg L, time of 360 min, pH of 8, and biosorbent amount of 10 mg. The experimental data of methylene blue biosorption followed the kinetics and isotherm models of pseudo-second-order (: 0.98, Adj: 0.98, and : 8.97) and Dubinin-Radushkevich (: 0.99, Adj: 0.98, and : 6.84), respectively, based on the statistical tests of coefficient of determination (), adjusted coefficient of determination (Adj), and root mean squared error (). The biosorption of methylene blue was a physical, spontaneous, and energetically favorable process (: 3.48 kJ mol and Δ°: (-14.51) - (-10.02) kJ mol). This residual biological material from the fixed oil biorefinery process exhibited higher biosorption performance (187.46 mg g) than own unrefined (virgin) form and its modified, activated, and composite forms and many other sorbents reported in the literature. Hereby, the current work showed that this novel biowaste-based material could be used as an environmentally and economically promising biosorbent to effectively purify methylene blue from aquatic environment.
本研究利用固定油生物炼制过程中产生的生物废料作为新型生物吸附剂，从水环境中吸附合成染料亚甲基蓝。通过批量实验优化了生物吸附操作的主要变量，如亚甲基蓝浓度、时间、pH 值和生物吸附剂用量。进行了特征化、动力学、平衡和热力学研究，以展示亚甲基蓝生物吸附的性质。傅里叶变换红外光谱和扫描电子显微镜研究表明，生物吸附剂具有不均匀的表面形貌，包括许多腔和突起，以及丰富的官能团谱。研究确定了亚甲基蓝生物吸附的最佳操作变量值为亚甲基蓝浓度 15mg/L、时间 360min、pH 值 8 和生物吸附剂用量 10mg。根据决定系数 ()、调整决定系数 (Adj) 和均方根误差 (RMSE) 的统计检验，亚甲基蓝生物吸附的实验数据遵循准二级动力学模型 ( : 0.98, Adj: 0.98, 和 : 8.97) 和 Dubinin-Radushkevich 等温线模型 (: 0.99, Adj: 0.98, 和 : 6.84)。基于统计检验的决定系数 ()、调整决定系数 (Adj) 和均方根误差 (RMSE)。亚甲基蓝的吸附是一种物理的、自发的、能量有利的过程 ( : 3.48 kJ mol 和 Δ°: (-14.51) - (-10.02) kJ mol)。与未经精制(原始)形式及其改性、活化和复合材料形式以及文献中报道的许多其他吸附剂相比，这种来自固定油生物炼制过程的剩余生物材料表现出更高的生物吸附性能(187.46 mg g)。因此，本工作表明，这种新型生物废料基材料可用作一种环境和经济上有前途的生物吸附剂，有效地从水环境污染中纯化亚甲基蓝。
