A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Willow bark proanthocyanidins with potential for water treatment : Chemical characterization and zinc/bisphenol A removal (2023)

Dou, J., Varila, T., Salminen, J.-P., Tuomikoski, S., Hietala, S., Hemmi, M., Hu, T., Lassi, U., & Vuorinen, T. (2023). Willow bark proanthocyanidins with potential for water treatment : Chemical characterization and zinc/bisphenol A removal. Separation and Purification Technology, 318, Article 123943. https://doi.org/10.1016/j.seppur.2023.123943

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Dou, Jinze; Varila, Toni; Salminen, Juha-Pekka; Tuomikoski, Sari; Hietala, Sami; Hemmi, Maria; Hu, Tao; Lassi, Ulla; Vuorinen, Tapani

Lehti tai sarja: Separation and Purification Technology

ISSN: 1383-5866

eISSN: 1873-3794

Julkaisuvuosi: 2023

Ilmestymispäivä: 28.04.2023

Volyymi: 318

Artikkelinumero: 123943

Kustantaja: Elsevier BV

Julkaisumaa: Alankomaat

Julkaisun kieli: englanti

DOI: https://doi.org/10.1016/j.seppur.2023.123943

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/89311

Tiivistelmä

This study investigates the chemical structure of proanthocyanidin-rich crude extracts from willow bark and these materials were tested initially as adsorbents for artificial (waste)water treatment. The crude extracts were obtained through mild water extraction and the colorant fractions were further chromatographically fractionated to understand the chemical structure of the willow bark proanthocyanidins. The chemistry of crude extracts and purified fractions were investigated using nuclear magnetic resonance (NMR) and ultraperformance liquid chromatography−tandem mass spectrometry (UPLC-MS/MS). Both NMR (liquid and solid-state) and UPLC-MS/MS suggest that the crude extracts constitute of interflavan linked flavan-3-ols, i.e. proanthocyanidins with both procyanidin (PC)-type and prodelphinidin (PD)-type subunits, with the PC/PD ratio of approximately 2.3 - 2.5. PD-type proanthocyanidins were detected from the purified colorant fractions only with UPLC-MS/MS. Both the UPLC-MS/MS and size exclusion chromatography suggest that the crude extracts have an average oligomerization degree of roughly 5-6 flavan-3-ol units. Adsorption experiments showed that the activated foams made of crude extracts were effective in removing both zinc and Bisphenol A (BPA) with removal efficiencies of roughly 80-90% and thus these willow bark-derived proanthocyanidins are promising in water treatment. The significance of this study suggests the upgrading use of crude extracts for water treatment could significantly improve the value of willow bark.

YSO-asiasanat: luonnonaineet; puunkuori; pajut; proantosyanidiinit; vedenkäsittely; vedenpuhdistus; sinkki (metallit); bisfenoli A

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2023

Alustava JUFO-taso: 2