The Influence of a Static, Homogeneous Magnetic Field on the Sorption Properties of Soybean Meal During Maritime Transport

ABSTRACT: Providing safety and maintaining high quality of dry cargo, transported by sea, is associated with the necessity of taking into consideration their specific property, which is hygroscopicity. Susceptibility to the impact of water, which also occurs in vapour state, concerns mainly dry cargo, which are organic matter, containing carbohydrates and protein in their composition. This is because these substances have strong connection with water. The example of a bulk cargo often transported by sea is soybean meal, which is mainly produced in the USA, Brazil and Argentina. Due to its economic importance, the quality of soybean meal, which is globally used in the animal nutrition (poultry and swine), remains an important research issue. This product is obtained by subjecting the soybeans to cracking and dehulling processes, in order to facilitate the extraction of the oil. Water absorption of soybean meal causes reactions taking place in it, which leads to the changes in its chemical composition and, consequently, also in its nutritional values. Moreover, increasing the water content, leading to the increase of water activity, may significantly deteriorate the microbiological safety of the meal. Therefore, the research was undertaken to determine whether the sorption properties of soybean meal will change due to the influence of a static, homogeneous magnetic field. This aim has been achieved by determining and comparing the water vapour adsorption isotherms. The comparison of the isotherms determined under normal conditions and under the influence of a static, homogeneous magnetic field with an induction of 10 mT has been made on the basis of empirical data. Furthermore, using the Brunauer, Emett and Teller equation (BET), the monolayer and the energy constant of the sorption process have been estimated. The isotherms were determined at 20°C. The study lasted 9 days. Desiccators with aqueous supersaturated solutions of substances and a generator of a static magnetic field were used in the research. The obtained results have indicated that the influence of the magnetic field is a factor that causes the differentiation between the sorption properties of soybean meal expressed in the volume of the monolayer and the energy associated with the sorption phenomenon. The inferred findings show, that the magnetic field has an impact on the course of the sorption phenomenon in organic samples, and may determine the stability of the cargo during long-term maritime transport.

KEYWORDS: Sea Transportation, Maritime Transport, Cargo Transportation, Magnetic Field, Soyabean Meal, Sorption Properties, Brunauer, Emett and Teller (BET) Equation, Bulk Cargo

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Citation note:

Ocieczek A., Kaizer A., Otremba Z.: The Influence of a Static, Homogeneous Magnetic Field on the Sorption Properties of Soybean Meal During Maritime Transport. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 15, No. 3, doi:10.12716/1001.15.03.20, pp. 649-657, 2021

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