2025-02-06 チャルマース工科大学
＜関連情報＞
- https://news.cision.com/chalmers/r/mercury-content-in-tuna-can-be-reduced-with-new-packaging-solution,c4100159
- https://www.sciencedirect.com/science/article/pii/S0927775724024269
- https://onlinelibrary.wiley.com/doi/10.1002/gch2.202400161
メチル水銀除去のためのメソポーラスシリカベースの活性コーティングの開発 活性パッケージングの強化に向けて Development of mesoporous silica-based active coatings for methylmercury removal: Towards enhanced active packaging
Przemysław Strachowski, Geeta Mandava, Johan Lundqvist, Romain Bordes, Mehdi Abdollahi
Colloids and Surfaces A: Physicochemical and Engineering Aspects Available online: 15 October 2024
DOI:https://doi.org/10.1016/j.colsurfa.2024.135562
Graphical Abstract
Abstract
Active coatings capable of selectively removing pollutants are an innovative approach against human exposure to pollutants via food. This study aimed to develop an active coating capable of removing methylmercury from liquid food media. Thiolation of mesoporous silica particles modified via (3-Mercaptopropyl)trimethoxysilane increased their mercury adsorption capacity to 100 mg/g. The particles were successfully integrated into industrial, epoxy and polyurethane coatings but the induced mercury adsorption efficiency in the coatings was dependent on their type of binder. Scanning electron microscopy and energy-dispersive X-ray results revealed that the silica particles were entrapped within the coatings but remained more accessible to the external media in the industrial and polyurethane coatings. Thermogravimetric analysis confirmed the successful integration of the components. The kinetics of adsorption showed that the adsorption of methylmercury was achieved within a time range of 20-240 min, depending on the binder used in the coating. The methylmercury adsorption ability of the coatings was preserved in different food simulants and in the presence of competitive ions and in an environment comprising cysteine. In vitro biosafety assays on different cell lines showed no negative effect from the silica modification on the safety of the coatings.
システインを含む単一成分溶液を用いた魚肉からの水銀除去に関する新たな知見 New Insight into Mercury Removal from Fish Meat Using a Single-Component Solution Containing cysteine
Przemysław Strachowski, Geeta Mandava, Johan Lundqvist, Romain Bordes, Mehdi Abdollahi
Global Challenges Published: 02 October 2024
DOI:https://doi.org/10.1002/gch2.202400161
Abstract
A novel approach for reducing mercury content in fish meat during post-packaging storage is developed to extend the margin of their safe consumption. It involves employing a single-component aqueous medium containing cysteine, as the active agent responsible for displacing mercury from fish proteins and its stabilization in the medium without the need for pH adjustments. The mercury removal efficiency depends on the cysteine concentration and its ratio to fish muscle. Using 1.2 wt% cysteine enables a reduction of mercury in canned Albacore tuna by 25–35%, depending on the fish product type and the exposure time of up to 2 weeks. The potential for the successful application of the developed method in active food packaging solutions is studied for the simultaneous or subsequent purification of the extraction solution through adsorption. Using thiolated silica could potentially enable the extraction process but it is shown that the presence of cysteine significantly hinders the adsorption.
