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- Title
DEVELOPMENT OF THE RETRIEVING TECHNOLOGY OF CAROTENOIDS FROM PUMPKIN (CUCURBITA SPP.) PULP USING Zn-Al LAYERED DOUBLE HYDROXIDES.
- Authors
Kovalenko, Vadym; Kotok, Valerii; Dopira, Anton; Carbajal Arizaga, Gregorio Guadalupe; Verbitskiy, Volodymyr; Medianyk, Volodymyr; Berzenina, Oksana; Anataichuk, Inna
- Abstract
Carotenoids are biologically active materials with strong antioxidant properties, some of them are provitamins A. A promising source of carotenoids is pumpkin pulp. The object of research is the technology of retrieving carotenoids using LDH. The flowsheet for obtaining pumpkin carotenoids by precipitation of the carotenoids-LDH composite was developed: a) obtaining fresh pumpkin juice with the introduction of Zn and Al salts; b) precipitating the carotenoids-LDH composite by adding alkali to pH=9 at t=60 °С and stirring; c) filtering the precipitate of the composite under vacuum, drying, rinsing, re-filtering, and re-drying; d) separating the composite into components. A simple mechanical method (grinding and sieving) was proposed to separate the composite into carotenoid-enriched and LDH-enriched materials. The method is based on the internal self-abrasion of the composite when grinding solid particles of LDH as grinding bodies. When removing carotenoids in the form of a composite, rapid precipitation of the sediment and ease of filtration under vacuum were found. X-ray diffraction analysis showed that the composite and products of its separation contain X-ray amorphous Zn-Al LDH, an oxide phase, and an amorphous phase of carotenoids. The method of dichloroethane extraction proved the effectiveness of the composite separation process. It was shown that for the optimal amount of Zn-Al LDH, the content of carotenoids in carotenoidenriched material was 24.4 %, and in LDHenriched – 4.4 %. For these conditions, it was found that the total yield of carotenoids was 184.3 mg/100 g of pumpkin pulp, of which 155.4 mg/100 g was in the carotenoidenriched material and 28.9 mg/100 g was in the LDH-enriched material. A hypothesis was expressed regarding the chemical nature of the interaction of carotenoids and LDH in the composite due to π-d interaction. The resulting carotenoid-containing materials can be used as food additives or processed to obtain purified carotenoids.
- Subjects
ALUMINUM-zinc alloys; LAYERED double hydroxides; PUMPKINS; FOOD additives; CUCURBITA; HYDROXIDES; CAROTENOIDS
- Publication
Eastern-European Journal of Enterprise Technologies, 2022, Vol 118, Issue 6, p6
- ISSN
1729-3774
- Publication type
Article
- DOI
10.15587/1729-4061.2022.263169