El-Desouky Tarek A
Department of Food Toxicology and Contaminant, National Research Centre, Dokki, Giza, Egypt.
Sci Rep. 2025 Jan 17;15(1):2264. doi: 10.1038/s41598-025-85108-w.
This study evaluates the potential of ozonated corn starch (OCS) and ultrasonicated ozonated corn starch (USOCS) as adsorbents for patulin removal in buffer solutions. The results indicated that dual modification significantly altered the starch's structure, introducing functional groups such as carbonyl and carboxyl groups, and increasing its surface area. These modifications led to enhanced patulin adsorption capacity. Adsorption efficiency was tested across different adsorbent doses (150 mg, 200 mg, 250 mg) and contact times (15, 30, 45, and 60 min). The highest removal efficiency of 92.5% was recorded for the 250 mg dose at 60 min, with USOCS showing superior performance compared to native corn starch and OCS. Kinetic studies revealed that the pseudo-second-order model provided the best fit for the adsorption process, indicating chemisorption as the dominant mechanism. The Langmuir and Freundlich isotherms were used to describe the adsorption behavior, with a maximum adsorption capacity (q) of 15.19 µg/mg and a Langmuir constant (K) of 54.00 L/µg for the 250 mg dose. Additionally, the modified starch demonstrated consistent adsorption performance at varying concentrations, with a favorable adsorption intensity (n > 1), supporting its potential for practical applications. These findings highlight the modified corn starch as an efficient, biodegradable, and low-cost adsorbent suitable for mitigating patulin contamination in food products, offering a sustainable alternative for improving food safety.
本研究评估了臭氧化玉米淀粉（OCS）和超声臭氧化玉米淀粉（USOCS）作为缓冲溶液中展青霉素去除吸附剂的潜力。结果表明，双重改性显著改变了淀粉的结构，引入了羰基和羧基等官能团，并增加了其表面积。这些改性导致展青霉素吸附能力增强。在不同吸附剂剂量（150mg、200mg、250mg）和接触时间（15、30、45和60分钟）下测试了吸附效率。在60分钟时，250mg剂量的去除效率最高，达到92.5%，与天然玉米淀粉和OCS相比，USOCS表现出更优异的性能。动力学研究表明，准二级模型最适合吸附过程，表明化学吸附是主要机制。使用Langmuir和Freundlich等温线描述吸附行为，250mg剂量的最大吸附容量（q）为15.19μg/mg，Langmuir常数（K）为54.00L/μg。此外，改性淀粉在不同浓度下表现出一致的吸附性能，具有良好的吸附强度（n>1），支持其实际应用潜力。这些发现突出了改性玉米淀粉作为一种高效、可生物降解且低成本的吸附剂，适用于减轻食品中的展青霉素污染，为提高食品安全提供了一种可持续的替代方案。
