Publications by authors named "Angelika Gryta"
Article Synopsis
- Nitrogen adsorption isotherms and the BET model are commonly used to estimate the surface area of biochar, but they often yield low surface area results that don't align with the material's high sorption capacities.
- In contrast, this study suggests that water adsorption may provide a more accurate estimation of biochar surface area, as it showed better alignment with properties like cation exchange capacity.
- Results indicated that while nitrogen gas adsorption energies were higher, the nitrogen surface areas were lower compared to those derived from water vapour, showing how pyrolysis temperature affects these measurements differently.
Knowledge on the effects of minerals on soil water stability and wettability is mostly gained from experiments on natural soils of different mineral composition. To gain a "clearer" picture, the water stability and wettability of artificial aggregates composed of soil silt and various proportions of pure minerals: kaolinite, montmorillonite, illite, zeolite and goethite, were examined. The wettability was attributed to contact angles measured goniometrically and to the water drop penetration time (WDPT).
View Article and Find Full Text PDFThe most popular protein source in poultry feed mixtures is soybean. However, cheaper and more available alternative protein sources are being sought, and feed manufacturers more and more often turn their attention to the post-extraction meals of local oil plants, e.g.
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