Comparative study of four different flavonoid compounds-containing plant extracts functionalised waste wool for accelerating aqueous chromium(VI) reductive removal / Jiayu Gu in COLORATION TECHNOLOGY, Vol. 138, N° 1 (02/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 1 (02/2022) . - p. 97-113 Titre : Comparative study of four different flavonoid compounds-containing plant extracts functionalised waste wool for accelerating aqueous chromium(VI) reductive removal Type de document : texte imprimé Auteurs : Jiayu Gu, Auteur ; Yongchun Dong, Auteur ; Jiaxuan Zhang, Auteur Année de publication : 2022 Article en page(s) : p. 97-113 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Caractérisation Chrome hexavalent Déchets industriels -- Elimination Evaluation Extraits de plantes Flavonoïdes Laine -- Déchets Réduction (chimie) Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Four different plant material extracts containing flavonoid compounds were prepared with fruits of Lycium ruthenicum Murray (LRM) and Vaccinium spp. (VS), Ginkgo biloba L. (GBL) leaves and grape seeds. On the basis of several characterisation, these extracts were then used for functionalising waste wool fibres by an exhaustion dyeing process. Content of deposited flavonoid compounds and aqueous chromium(VI) reductive removal capacity of four plant material extract dyed wool fibres were investigated and compared. The results indicated that LRM and VS extracts contained more flavonoid compounds (0.12-0.15 mg ml−1) than the other two extracts (0.06-0.08 mg ml−1), which led to high content of deposited flavonoid compounds and strong chromium(VI) reductive removal performance of their dyed wool fibres. Importantly, 0.10 mmol L−1 of chromium(VI) species could be almost completely removed by fallen GBL extract dyed wool fibre from water by increasing content of deposited flavonoid compounds up to 8.0 mg g−1, which offer a novel strategy to produce cost-effective, environmental-friendly and renewable chromium(VI) removal material based on waste control by waste. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Extraction of flavonoid compounds from four plant materials - Characterisation of four plant material extracts - Dyeing procedure of wool fibre with plant material extracts - Reducing power evaluation - Chromium(VI) species removal study - Reusability experiments - RESULTS AND DISCUSSION :| Characterisation of four plant material extracts - Optimised dyeing process of wool fibre with the four plant material extracts - Reductive removal of chromium(VI) using plant material extract dyed wool fibres - Chromium(VI) removal kinetics - Recycling capacity study - Seasonal variations of total flavonoid content value and chromium(VI) reduction from Ginkgo biloba L. (GBL) leaves - Comparison with other chromium(VI) removal materials - Table 1 : Chromium(VI) reduction and chromium(III) adsorption pseudo-second-order kinetic model parameters for four plant material extract dyed wool fibres - Table 2 : Comparison of the four dyed wool fibres with several typical chromium(Vl) removal materials DOI : https://doi.org/10.1111/cote.12575 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12575 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37503 [article]

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