Vázquez-Durán Alma, de Jesús Nava-Ramírez María, Martínez-Escutia Rubén, de Dios Figueroa-Cárdenas Juan, López-Coello Carlos, Téllez-Isaías Guillermo, Méndez-Albores Abraham
Unidad de Investigación Multidisciplinaria (UIM) L14 (Alimentos, Micotoxinas, y Micotoxicosis), Facultad de Estudios Superiores Cuautitlán (FES-C), Universidad Nacional Autónoma de México (UNAM), Cuautitlán Izcalli, State of Mexico, 54714, Mexico.
CINVESTAV-Unidad Querétaro, Libramiento Norponiente No. 2000, Fraccionamiento Real de Juriquilla, 76230, Querétaro, Mexico.
Environ Sci Pollut Res Int. 2023 Nov 24. doi: 10.1007/s11356-023-30992-w.
The ever-growing consumption of herbs around the globe has motivated the researchers to acquire practical knowledge about other potential applications in human and animal health. In this research, an unmodified adsorbent prepared from the holoparasitic herb C. corymbosa was utilized for the removal of the carcinogen aflatoxin B (AFB) from aqueous solutions. The adsorbent was characterized by Fourier transform near-infrared/mid-infrared spectrophotometry (FT-NIR/MIR), environmental scanning electron microscopy (ESEM), energy-dispersive X-ray fluorescence spectroscopy (EDX), X-ray diffraction (XRD), and point of zero charge (pH). Adsorption experiments were carried out in batch systems, and the experimental data was used for isothermal (Langmuir and Freundlich) and kinetic (linear and non-linear forms of the pseudo-first and pseudo-second order) models. In general, the unmodified adsorbent removed AFB independent of the solution pH, showing a theoretical adsorption capacity of 555.76 mg AFB/g at 303 K, significantly higher than that reported for other plant-based adsorbents and comparable with the efficiency of various inorganic adsorbents. Non-electrostatic attractions such as hydrogen bonding and dispersion forces along with complexation mechanisms were the primary interactions responsible for the adsorption of the pollutant. Our results clearly show that C. corymbosa could be a promising material for practical adsorption applications in the drinking water industry.
全球范围内对草药的消费不断增长，这促使研究人员去获取有关其在人类和动物健康方面其他潜在应用的实用知识。在本研究中，一种由全寄生草药C. corymbosa制备的未改性吸附剂被用于从水溶液中去除致癌物黄曲霉毒素B（AFB）。该吸附剂通过傅里叶变换近红外/中红外分光光度法（FT-NIR/MIR）、环境扫描电子显微镜（ESEM）、能量色散X射线荧光光谱法（EDX）、X射线衍射（XRD）以及零电荷点（pH）进行表征。吸附实验在间歇系统中进行，实验数据用于等温（朗缪尔和弗伦德利希）和动力学（拟一级和拟二级动力学的线性和非线性形式）模型。总体而言，未改性吸附剂去除AFB与溶液pH无关，在303 K时理论吸附容量为555.76 mg AFB/g，显著高于其他基于植物的吸附剂所报道的容量，且与各种无机吸附剂的效率相当。诸如氢键和色散力等非静电吸引力以及络合机制是污染物吸附的主要相互作用。我们的结果清楚地表明，C. corymbosa可能是饮用水行业实际吸附应用中的一种有前景的材料。
