Adsorption of aflatoxin B1 to corn by-products

Yue Liu; Lei Xia; Joseph Hubert Galani Yamdeu; Yun Yun Gong; Caroline Orfila

doi:10.1016/j.foodchem.2023.138212

Adsorption of aflatoxin B₁ to corn by-products

Food Chem. 2024 May 15:440:138212. doi: 10.1016/j.foodchem.2023.138212. Epub 2023 Dec 15.

Authors

Yue Liu¹, Lei Xia², Joseph Hubert Galani Yamdeu³, Yun Yun Gong², Caroline Orfila⁴

Affiliations

¹ College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Nutritional Science and Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds, UK. Electronic address: y.liu@jmu.edu.cn.
² Nutritional Science and Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds, UK.
³ Nutritional Science and Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds, UK; Section of Natural and Applied Sciences, School of Psychology and Life Sciences, Canterbury Christ Church University, Canterbury, UK.
⁴ Nutritional Science and Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds, UK. Electronic address: c.orfila@leeds.ac.uk.

PMID: 38150899
DOI: 10.1016/j.foodchem.2023.138212

Abstract

The adsorption of aflatoxin B₁ (AFB₁) to natural fiber materials prepared from corn by-products was investigated in this study. The results showed that corn cob powder (CCP) dose, particle size, time (0.25-24 h), temperature (4, 20, 37, 50 and 100 °C) and pH (2-8), had significant effects on adsorption. The maximum adsorption (98%) was with particles 500-355 µm in size at 20 °C for 8 h, at the dose of 50 mg mL^-1. The adsorption fitted pseudo-second-order model and Langmuir isotherm well. Besides, CCP had a higher adsorption capacity to AFB₁ than any single cell wall components of corn, which indicated that capillary effect happened in cell wall might be the main reason for adsorption. The results also suggested that CCP could reduce AFB₁ content from both liquid and solid food matrixes. Briefly, CCP displayed promising properties that could be developed in nature-based practical applications for food aflatoxin decontamination.

Keywords: Adsorption; Aflatoxin B(1); By-products; Corn cob; Zea Mays.

MeSH terms

Adsorption
Aflatoxin B1* / analysis
Aflatoxins* / analysis
Temperature
Zea mays

Substances

Aflatoxin B1
Aflatoxins