Sustainable extraction and utilization of chlorophyll from microalgae for eco-friendly wool dyeing

Jorge, Alexandre M.S.; Pedroso, Pedro R.M.; Pereira, Jorge F.B.

doi:10.1016/j.jclepro.2024.142009

Cited by 5 publications

(2 citation statements)

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“…Content of chlorophylls is important considering that they can be used in numerous industries, from food to pharmaceuticals, textiles, and cosmetics [ 34 ]. For instance, intense green color enables application of chlorophylls for eco-friendly dying of food and textiles [ 34 , 35 ]. Beside intense color, chlorophylls are also known for their antioxidant and anti-inflammatory properties [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…For instance, it was reported that chlorophyll a and b, detected in OLE obtained by leaves maceration in acetone, range from 0.5 to 1.1 mg/g and from 0.2 to 0.5 mg/g, respectively [4], total chlorophylls in OLE obtained using 70% ethanol ranged from 0.5 to 0.8 mg/g [16], etc. Content of chlorophylls is important considering that they can be used in numerous industries, from food to pharmaceuticals, textiles, and cosmetics [34]. For instance, intense green color enables application of chlorophylls for eco-friendly dying of food and textiles [34,35].…”

Section: Chlorophyll a Chlorophyll B And Carotenoid Content Of Olive ...mentioning

confidence: 99%

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An Eco-Friendly Supercritical CO2 Recovery of Value-Added Extracts from Olea europaea Leaves

Kyriakoudi,

Mourtzinos,

Tyśkiewicz

et al. 2024

Foods

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An eco-friendly approach towards the recovery of value-added extracts from olive tree leaves with the aid of supercritical CO2 at 30 MPa was carried out. The impact of extraction temperature (35–90 °C) and presence of co-solvents (ethanol, water, and aqueous ethanol) on the total phenolic, flavonoid, and pigment content, as well as oleuropein, hydroxytyrosol, tyrosol, and α-tocopherol content was determined. In addition, the antioxidant activity of extracts from tree leaves using DPPH, ABTS, and CUPRAC assays was investigated. The results of the study showed that the most effective supercritical CO2 extraction was at 90 °C with an addition of ethanol, which enabled the separation of extract with the highest content of tested compounds. Some of the highest recorded values were for oleuropein 1.9 mg/g, for carotenoids 5.3 mg/g, and for α-tocopherol 2.0 mg/g. Our results are expected to contribute to the efforts towards the valorization of olive leaves as a sustainable source of valuable compounds, and boost local economies as well as the interest of pharmaceutical, food, and cosmetic industries for novel food by-product applications.

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