Capability of walnut (juglans regia L.) shells as a natural biosorbent of aflatoxin B1 in a batch experiment model

International Journal of Food Engineering Pub Date : 2024-02-19 DOI:10.1515/ijfe-2023-0273

Syed Tariq Ali, Muhammad Asif Asghar, Farman Ahmed, Dua Saleem, Amna Farzeen Baig, Najma Saeed Ullah

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Abstract

In the present study, the efficacy of low-cost biosorbent obtained from walnut shells for the removal of AFB1 was examined. The characterization of the biosorbent was investigated using SEM, EDS, FTIR, XRD, and pHpzc. Maximum removal (90.5 %) was achieved using 100 mg/mL of biosorbent, pH 7.0 at 45 °C for 45 min with 100 ng/mL of AFB1. The biosorbent’s adsorption capacity was found to be 178.9 mg/g as calculated using the Langmuir isotherm and assumption of monolayer AFB1 adsorption with homogenously dispersed adsorption positions on the biosorbent exterior. The kinetic data indicated the fast AFB1 uptake on biosorbent and followed the pseudo-second-order model. The thermodynamic factors revealed that the adsorption process is viable, spontaneous and endothermic. Furthermore, slight decrease in AFB1 adsorption was observed after repeating the adsorption–desorption process for 5 times. In conclusion, the obtained biosorbent is an economically, eco-friendly and promising material for the removal of AFB1.

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批量实验模型中核桃（juglans regia L.）壳作为黄曲霉毒素 B1 天然生物吸附剂的能力

本研究考察了从核桃壳中提取的低成本生物吸附剂去除 AFB1 的功效。使用 SEM、EDS、FTIR、XRD 和 pHpzc 对生物吸附剂的特性进行了研究。使用 100 毫克/毫升的生物吸附剂，pH 值为 7.0，在 45 °C、45 分钟内吸附 100 毫微克/毫升的 AFB1，达到最大吸附量（90.5%）。根据 Langmuir 等温线和单层吸附 AFB1 的假设，生物吸附剂的吸附容量为 178.9 mg/g，吸附位置均匀地分散在生物吸附剂表面。动力学数据表明，生物吸附剂对 AFB1 的吸附速度很快，并遵循假二阶模型。热力学因素表明，吸附过程是可行的、自发的和内热的。此外，重复 5 次吸附-解吸过程后，AFB1 的吸附量略有下降。总之，所获得的生物吸附剂是一种经济、环保和有前景的去除 AFB1 的材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Journal of Food Engineering

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