TECNM/Instituto Tecnológico de Toluca/Departamento de posgrado, Avenida Tecnológico 100 s/n. Colonia Agrícola, Bellavista, La Virgen, 52149 Metepec, Mexico.
TECNM/Instituto Tecnológico de Toluca/Departamento de posgrado, Avenida Tecnológico 100 s/n. Colonia Agrícola, Bellavista, La Virgen, 52149 Metepec, Mexico.
J Hazard Mater. 2022 Feb 15;424(Pt A):127339. doi: 10.1016/j.jhazmat.2021.127339. Epub 2021 Sep 26.
This work presents the formation of biochar with calcium nanoparticles (NPsCa) in function of pyrolysis time (C10, C30, C60, C120 and C180 min) using the Citrus tangerina peel and their evaluation in the remotion of Aflatoxin B1 (AFB1) in aqueous phase. Firstly, the Citrus tangerina was studied by Thermogravimetric analysis to determine the optimal temperature (TGA), obtaining a result of 600 °C. The biochar (NPsCa) were characterized by Scanning Electronic Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS), as well as surface properties including the identification of functional groups by Fourier Transform Infrared Spectrometry (FTIR), and energetic states through the X-Ray Photoelectron Spectroscopy (XPS). The adsorption studies were carried out on the different materials and later, the experimental data was adjusted to different mathematical models, obtaining the best fit of the kinetic data to the Ho-McKay model, whilst the adsorption isotherms were adjusted to the model of Langmuir, which indicates that the Aflatoxin B1 adsorption process is carried out through a monolayer chemisorption process with maximum sorption capacities (qm) ranging between 15.72 and 63.22 μg g with the 180th minute being the adequate time to obtain the carbon with the best surface properties and the best adsorption capacity. Additionally, it was observed that each material can be reused up to five times in accordance with the results from the reuse cycles.
本工作研究了在热解时间（C10、C30、C60、C120 和 C180 分钟）下用纳米碳酸钙（NPsCa）形成生物炭的情况，使用的原料是桔皮，并评估了它们在水相中去除黄曲霉毒素 B1（AFB1）的效果。首先，通过热重分析（TGA）对桔皮进行了研究，以确定最佳温度（TGA），结果为 600°C。通过扫描电子显微镜（SEM）和能谱（EDS）对生物炭（NPsCa）进行了表征，还通过傅里叶变换红外光谱（FTIR）对表面性质进行了鉴定，包括官能团的识别，以及通过 X 射线光电子能谱（XPS）对能量状态进行了鉴定。在不同材料上进行了吸附研究，然后，将实验数据调整到不同的数学模型中，发现动力学数据与 Ho-McKay 模型的拟合最好，而吸附等温线则与 Langmuir 模型拟合最好，这表明黄曲霉毒素 B1 的吸附过程是通过单层化学吸附进行的，最大吸附容量（qm）在 15.72 到 63.22μg g 之间，第 180 分钟是获得具有最佳表面性质和最佳吸附容量的碳的最佳时间。此外，根据重复使用循环的结果，观察到每种材料可以重复使用多达五次。
