Department of Environmental Protection and Control-Iskenderun Vocational School of Higher Education, Iskenderun Technical University, Hatay, Turkey.
Department of Metallurgy-Iskenderun Vocational School of Higher Education, Iskenderun Technical University, Hatay, Turkey.
Environ Monit Assess. 2023 Jun 2;195(7):797. doi: 10.1007/s10661-023-11421-4.
This study aims to remove oxytetracycline (OTC) that harms the ecosystem, with activated carbon (LPAC) obtained from Lemon Pulp (LP). Characterization and properties of LPAC were analyzed by Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), X-ray diffraction (XRD) and point of zero charge (pH) analyses. BET surface area, pore volume and pH of LPAC produced by carbonization at 400 °C and activation with KOH at 800 °C were obtained as 1333.01 m/g, 0.391 cm/g, and 6.81, respectively. pH, reaction time, initial OTC concentration, and adsorbent amounts were optimized in the adsorption study performed with LPAC with high porosity and micropores. Kinetic evaluation was made with pseudo-first-order, pseudo-second-order, and intra-particle diffusion models and Freundlich, Langmuir, and Temkin equations are used to investigate their isotherms under reaction equilibrium conditions, and also the results were analyzed by statistical method (ANOVA). In pseudo-second-order kinetic and Freundlich isotherm models, where the best results were obtained, R values were calculated as 0.999 and 0.995, respectively. Maximum OTC removal efficiency was found as 104.22 mg/g. Overall, this research indicates that LPAC for the treatment of water contaminated with antibiotics is environmentally friendly green material.
本研究旨在去除对生态系统有害的土霉素（OTC），使用柠檬渣（LP）制备的活性炭（LPAC）。通过比表面积与孔隙度分析（BET）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、X 射线衍射（XRD）和零电荷点（pH）分析对 LPAC 的特性和性质进行了分析。在 400°C 碳化和 800°C KOH 活化条件下制备的 LPAC 的 BET 表面积、孔体积和 pH 值分别为 1333.01 m/g、0.391 cm/g 和 6.81。在具有高孔隙率和微孔的 LPAC 的吸附研究中，优化了 pH 值、反应时间、初始 OTC 浓度和吸附剂用量。使用准一级、准二级和内扩散模型对动力学进行了评估，并使用 Freundlich、Langmuir 和 Temkin 方程研究了在反应平衡条件下的等温线，还通过统计方法（ANOVA）对结果进行了分析。在准二级动力学和 Freundlich 等温线模型中，获得了最佳结果，R 值分别计算为 0.999 和 0.995。最大 OTC 去除效率为 104.22mg/g。总的来说，本研究表明，用于处理受抗生素污染的水的 LPAC 是一种环保的绿色材料。
