The Influence of the Used Bleaching Earth on the Content of Natural Dyes in Hemp (Cannabis sativa L.) Oils
Source abstract
Abstract
Cold-pressed hemp oils are characterized by an intense color, which is undesirable when used directly. Therefore, research was undertaken on removing chlorophyll and carotenoids effectively. This publication presents the results of tests that verified the adsorption properties of seven bleaching earths (BE1–BE7) in two doses (2.5% and 5.0%) in the low-temperature bleaching process of hemp oils. These oils were obtained by cold and hot pressing of the seeds of three varieties of hemp (Cannabis sativa L.): Finola, Earlina 8FC, and Secuieni Jubileu. The color change and the content of carotenoid and chlorophyll pigments in the bleached oils were verified using the colorimetric method (CIE-Lab). The BEs used had different abilities to reduce the content of natural dyes connected with oil decolorization. The conducted research allowed us to characterize the influence of BEs on the organoleptic properties of the tested oils. Hemp oil obtained from the Secuieni Jubileu CP and HP hemp variety should be bleached with unmodified magnesian bentonite at 2.5%. Unmodified attapulgite clay is not recommended for this variety, as it strongly adsorbs carotenoids from the oil.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Polysaccharides Composition and Applications · Botanical Research and Applications · Lignin and Wood Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Agroengineering and Quality Analysis, Faculty of Production Engineering, Wroclaw University of Economics and Business, Komandorska 118/120, 53-345 Wrocław, Poland
References (49)
Show source-provided references
1. Impact of Selected Chemical Characteristics of Cold-Pressed Oils on Their Oxidative Stability Determined Using the Rancimat and Pressure Differential Scanning Calorimetry Method10.1007/s12161-017-1081-1 ↗
2. Symoniuk, E., Wroniak, M., Napiórkowska, K., Brzezińska, R., and Ratusz, K. (2022). Oxidative Stability and Antioxidant Activity of Selected Cold-Pressed Oils and Oils Mixtures. Foods, 11.10.3390/foods11111597 ↗
3. Callaway, J.C. (2004). Hempseed as a Nutritional Resource: An Overview, Kluwer Academic Publishers.10.1007/s10681-004-4811-6 ↗
4. Spectroscopy Approach to Methanol Detection in Waste Fat Methyl Esters10.1016/j.saa.2018.11.003 ↗
5. Determination of optimal share of methyl esters from waste fats in biofuels with quality consistent with the standards EN 14214 and EN 590
6. Vegetable Oils as Monomeric and Polymeric Materials: A Graphical Review10.1016/j.crgsc.2022.100343 ↗
7. Investigation on Food Packaging Polymers: Effects on Vegetable Oil Oxidation10.1016/j.foodchem.2020.126299 ↗
8. Fridrihsone, A., Romagnoli, F., and Cabulis, U. (2020). Environmental Life Cycle Assessment of Rapeseed and Rapeseed Oil Produced in Northern Europe: A Latvian Case Study. Sustainability, 12.10.3390/su12145699 ↗
9. Kwaśnica, A., Teleszko, M., Marcinkowski, D., Kmiecik, D., Grygier, A., and Golimowski, W. (2022). Analysis of Changes in the Amount of Phytosterols after the Bleaching Process of Hemp Oils. Molecules, 27.10.3390/molecules27217196 ↗
10. Czwartkowski, K., Wierzbic, A., and Golimowski, W. (2022). Awareness and Expectations of Polish Consumers Regarding Edible Niche Oils as a Food Product. Sustainability, 14.10.3390/su142114239 ↗
11. Cavallo, P., Dini, I., Sepe, I., Galasso, G., Fedele, F.L., Sicari, A., Censi, S.B., Gaspari, A., Ritieni, A., and Lorito, M. (2020). An Innovative Olive Pâté with Nutraceutical Properties. Antioxidants, 9.10.3390/antiox9070581 ↗
12. Virgin Hemp Seed Oil: An Interesting Niche Product10.1002/ejlt.200700311 ↗
13. Quality, Stability, Carotenoids and Chromatic Parameters of Commercial Sacha Inchi Oil Originating from Peruvian Cultivars10.1007/s13197-019-03960-x ↗
14. Siano, F., Moccia, S., Picariello, G., Russo, G.L., Sorrentino, G., Di Stasio, M., La Cara, F., and Volpe, M.G. (2019). Comparative Study of Chemical, Biochemical Characteristic and ATR-FTIR Analysis of Seeds, Oil and Flour of the Edible Fedora Cultivar Hemp (Cannabis Sativa L.). Molecules, 24.10.3390/molecules24010083 ↗
15. Plat, J., Baumgartner, S., Vreugdenhil, A.C.E., Konings, M.C.J.M., Calkins, K.L., and Mensink, R.P. (2019). Modifying Serum Plant Sterol Concentrations: Effects on Markers for Whole Body Cholesterol Metabolism in Children Receiving Parenteral Nutrition and Intravenous Lipids. Nutrients, 11.10.3390/nu11010120 ↗
16. Health Impacts of Different Edible Oils Prepared from Coconut (Cocos Nucifera): A Comprehensive Review10.1016/j.tifs.2018.07.025 ↗
17. Rapa, M., Ciano, S., Rocchi, A., D’Ascenzo, F., Ruggieri, R., and Vinci, G. (2019). Hempseed Oil Quality Parameters: Optimization of Sustainable Methods by Miniaturization. Sustainability, 11.10.3390/su11113104 ↗
18. Łaska-Zieja, B., Golimowski, W., Marcinkowski, D., Niedbała, G., and Wojciechowska, E. (2020). Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed Oil. Foods, 9.10.3390/foods9050603 ↗
19. Marcinkowski, D., Czwartkowski, K., Bochniak, M., Wereńska, M., and Krzaczek, P. (2022). Reuse of Bleaching Earth: The Green Solution for Rapeseed Oil Producers. Sustainability, 14.10.3390/su142013071 ↗
20. Removal of Phosphorus from Vegetable Oil by Acid-Activated Sepiolite10.1016/j.jfoodeng.2008.09.020 ↗
21. Preparation and Characterization of Nanoporous Powders from Bentonite by Hydrochloric Acid Leaching and Using as Bleaching Earth10.1007/s42452-020-2545-2 ↗
22. Clay-Activated Carbon Adsorbent Obtained by Activation of Spent Bleaching Earth and Its Application for Removing Pb(II) Ion10.1007/s11356-020-10473-0 ↗
23. The Use of Calcium Sulphate Dihydrate (CaSO4·2H2O) as a Bleaching Agent for Crude Soya Bean Vegetable Oil10.1016/j.promfg.2019.07.014 ↗
24. Effect of Type of Bleaching Earth on the Final Color of Refined Palm Oil10.1016/j.lwt.2014.05.028 ↗
25. Colza Oil Bleaching through Optimized Acid Activation of Bentonite. A Comparative Study10.1016/j.clay.2008.03.014 ↗
26. Bleaching Techniques Impact on Some Quality Parameters in Two Different Cold-Pressed Oils Obtained at Farm Scale10.1111/jfpe.14357 ↗
27. Cannabis Sativa: The Plant of the Thousand and One Molecules10.3389/fpls.2016.00019 ↗
28. Golimowski, W., Łaska, B., Pasyniuk, P., Adamczyk, F., and Trawiński, A. (2016). Institute of Technology and Life Sciences. (PL 232781), Patent.
29. Total Color Change (ΔE∗) Is a Poor Estimator of Total Carotenoids Lost during Post-Harvest Storage of Biofortified Maize Grains10.1016/j.heliyon.2020.e05173 ↗
30. (1995). Oils and Fats Vegetable and Animal—Determination of the General Spectrophotometric Color (Standard No. PN-A-86934:1995).
31. The Spectral Determination of Chlorophylls a and b, as Well as Total Carotenoids, Using Various Solvents with Spectrophotometers of Different Resolution10.1016/S0176-1617(11)81192-2 ↗
32. Islam, M., Rajagukguk, Y.V., Siger, A., and Tomaszewska-Gras, J. (2023). Assessment of Hemp Seed Oil Quality Pressed from Fresh and Stored Seeds of Henola Cultivar Using Differential Scanning Calorimetry. Foods, 12.10.3390/foods12010135 ↗
33. Some Physical Properties of Hemp Seed10.1016/S1537-5110(03)00130-2 ↗
34. Effects of Temperature, Pressure, Preheating Time and Pressing Time on Rubber Seed Oil Extraction Using Hydraulic Press10.1016/j.proche.2014.05.030 ↗
35. Comparison of the Quality of Cold Pressed and Virgin Rapeseed Oils with Industrially Obtained Oils
36. A Comparative Study on Performance of Industrial and Microwave Techniques for Sunflower Oil Bleaching Process10.1016/j.foodchem.2021.130488 ↗
37. Dordevic, D., Gablo, N., Dordevic Janickova, S., and Tremlova, B. (2023). Effects of Centrifugation on the Oxidative Stability and Antioxidant Profile of Cold-Pressed Rapeseed Oil during Storage. Processes, 11.10.3390/pr11072224 ↗
38. Physicochemical Characteristics, Oxidative Stability, Pigments, Fatty Acid Profile and Antioxidant Properties of Co-Pressed Oil from Blends of Peanuts, Flaxseed and Black Cumin Seeds10.1016/j.focha.2023.100231 ↗
39. The Effect of Bleaching and Physical Refining on Color and Minor Components of Palm Oil10.1007/s11746-001-0387-8 ↗
40. Experimental Investigation of Processing Parameters and Effects of Degumming, Neutralization and Bleaching on Lampante Virgin Olive Oil’s Quality10.1016/j.fbp.2015.02.002 ↗
41. Kong, S., Keang, T., Bunthan, M., Say, M., Nat, Y., Tan, C.P., and Tan, R. (2023). Hydraulic Cold-Pressed Extraction of Sacha Inchi Seeds: Oil Yield and Its Physicochemical Properties. ChemEngineering, 7.10.3390/chemengineering7040069 ↗
42. Spano, M., Di Matteo, G., Rapa, M., Ciano, S., Ingallina, C., Cesa, S., Menghini, L., Carradori, S., Giusti, A.M., and Di Sotto, A. (2020). Commercial Hemp Seed Oils: A Multimethodological Characterization. Appl. Sci., 10.10.3390/app10196933 ↗
43. Laboratory-Scale Optimization of Hemp Seed Roasting Temperature and Time for Producing a High-Quality Pressed Oil10.1155/2023/8261279 ↗
44. Quality Indexes and Composition of 13 Commercial Hemp Seed Oils10.1016/j.jfca.2022.105112 ↗
45. Lo Turco, V., Litrenta, F., Nava, V., Albergamo, A., Rando, R., Bartolomeo, G., Potortì, A.G., and Di Bella, G. (2023). Effect of Filtration Process on Oxidative Stability and Minor Compounds of the Cold-Pressed Hempseed Oil during Storage. Antioxidants, 12.10.20944/preprints202304.0199.v1 ↗
46. Recent Advances in Ultrasound Technology Applications of Vegetable Oil Refining10.1016/j.tifs.2021.08.001 ↗
47. Optimization of Bleaching Parameters in Refining Process of Kenaf Seed Oil with a Central Composite Design Model10.1111/1750-3841.13758 ↗
48. Reduction of Chlorophyll in Cold-Pressed Hemp (Cannabis Sativa) Seed Oil by Ultrasonic Bleaching and Enhancement of Oxidative Stability10.1002/ejlt.201700349 ↗
49. Effects of Degumming and Bleaching on 3-MCPD Esters Formation during Physical Refining10.1007/s11746-011-1858-0 ↗