Comparison of polyflavonoids in bayberry tanning effluent and commercial bayberry tannin: prerequisite information for vegetable tanning effluent recycling

Teng, Bo; Jian, Xiaoyun; Gao, Yanping; Chen, Wuyong

doi:10.1016/j.jclepro.2015.09.005

Cited by 21 publications

(19 citation statements)

References 45 publications

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“…However, based on the data obtained with GPC and 13 C NMR, the molecular weights of these polyphenols are lower than the ones in the commercial vegetable tanning agent. Actually, the related phenomenon was already discovered in the salivary protein-polyphenol reactions: the active sites of the proteins will be preferentially taken by the polyphenols, which have higher molecular weights; meanwhile, the lower molecular weight ones will be left in the solutions [44][45][46]. Based on the results obtained with molecular dynamic study and DSC analysis, we also discovered that the lower molecular weight character leads to a less activated molecular as well as an unstable collagen-polyphenol complex in the collagenpolyphenol reaction.…”

Section: Molecular Docking and Molecular Dynamic Resultsmentioning

confidence: 99%

Structural Characteristics and Collagen Reaction Ability of Polyphenols in Larch Tanning Wastewater – an Important Hint for Vegetable Tanning Wastewater Recycling

Teng

Wang

et al. 2017

Pol. J. Environ. Stud.

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Wastewater recycling technologies have been widely used in tanneries to reduce environmental impacts. However, only a few recycling methods have been developed for vegetable tanning processes due to limited knowledge of their wastewaters. In this study, the structures of the polyphenols in the larch tanning wastewater (LTW) and commercial larch tannin (CLT) were characterized with spectrographic and chromatographic analysis. Structures of these polyphenols were illustrated accordingly; their collagen reaction abilities were then tested with thermal analysis and visualized with a molecular docking software. Results showed that polyphenols in LTW and CLT were all procyanidins. However, average molecular weight of the polyphenols in LTW was 1104Da, in contrast to an obviously higher value for the CLT sample (3334Da). Meanwhile, the LTW presented obvious lower reactivity in the collagen-polyphenol reaction, including lower thermal stabilities and docking energies, fewer hydrogen bonds, and lower interaction energies. These results provide a hint for vegetable tanning wastewater recycling: because of these structural differences, reactivity of the polyphenols in wastewater are lower than the ones in commercial tannins. Therefore, before the recycling processes, polyphenols must be chemically modified in accordance with these structural differences.

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Section: Molecular Docking and Molecular Dynamic Resultsmentioning

confidence: 99%

Structural Characteristics and Collagen Reaction Ability of Polyphenols in Larch Tanning Wastewater – an Important Hint for Vegetable Tanning Wastewater Recycling

Teng

Wang

et al. 2017

Pol. J. Environ. Stud.

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“…The 13 C-NMR and 1 H-NMR spectra were recorded on Bruker Biospin AVANCE III 600MHz ( 1 H, 600.23 MHz, 13 C, 150.93 MHz; Karlsruhe, Germany). For analysis of 13 C-NMR and 1 H-NMR, the samples were all dissolved in DMSO-d6 (30 mg/mL) ( 1 H was 2.49 ppm, 13 C was 39.5 ppm) (Teng et al 2016).…”

Section: C-nmr and 1 H-nmr Analysismentioning

confidence: 99%

“…where m/z 23.0 and 2.0 presented the molar mass of the sodium, and terminal hydrogen, respectively. The values 152.0 and 304.0 represented the molar mass of the galloyl and gallocatechin, meanwhile a and b was the number of these subunits in each polymer, respectively (Teng et al 2016).…”

Section: Extraction Structure Analysis Maldi-tof Ms Analysismentioning

confidence: 99%

Ultrasound-assisted extraction of bayberry tannin and optimization using response surface methodology

Dong

Zhang

et al. 2021

BioRes

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The extraction of bayberry tannins has potential to maximize the utilization of a forest waste. This study employed a four-level central composite design through response surface methodology to optimize the extraction of tannin from bayberry barks through ultrasound-assisted extraction (UAE). The effects of solute to solvent ratio (STSR), solvent concentration (SC), extraction time (ET), and sonication temperature (ST) on the total extraction yield of total condensed tannin (TCT yield) and total phenolic content (TPC) were investigated. The extracts were characterized with matrix-assisted laser desorption-time of flight mass spectrometer (MALDI-TOF MS), nuclear magnetic resonance (NMR), and gel permeation chromatography (GPC). The optimized condition was reached when the STSR and ST were set at 1:57.16 g/mL and 71.3%, when the ET and the ST was 39.1 min and 48.75 °C. In these conditions, the TCT yield and TPC reached their maximum values of 17.55% and 365.01 mg GAE/g, respectively. Furthermore, the polyflavonoids of bayberry tannin ranged from dimers to heptamers, which were only composed of proanthocyanidins (PC) containing galloy groups.

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“…Due to the presence of tannins, the wastewaters are usually highly colored, which is very difficult to eliminate by common methods (He et al, 2007). They also exhibit long-term negative environmental effects, due to their toxicity for microorganisms (He et al, 2007;Teng et al, 2016). The toxicity of tannins can be associated with several mechanisms such as substrate deprivation, loss of metal ions, and inactivation of microbial adhesins, enzymes, and cell envelope transport proteins (Bhoite and Murthy, 2015).…”

Section: Introductionmentioning

confidence: 99%

BIODEGRADATION OF ACACIA AND CHESTNUT TANNINS BY NATIVE ISOLATES OF THE GENUS Penicillium AND Aspergillus

Spier

Gutterres

2019

Braz. J. Chem. Eng.

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In the present work, the potential of native isolates of fungi strains to biodegrade vegetable tannins used in the tanning industry was evaluated. Penicillium citrinum showed to be more efficient for consumption of acacia tannin, reaching 94.85%. Aspergillus chevalieri needs a greater adaptation phase (48 h) in both acacia and chestnut medium, evidenced by the slow growth (0.022 h-1) and low biomass productivity (0.31 g.L-1. h-1). The acacia tannin presented a higher COD/BOD ratio (2.97) and lower total phenol content (68%) when compared to chestnut tannin. In addition, there was greater consumption of this tannin in the cultivations, which contradicts previous reports and corroborates the results obtained with FTIR analysis that suggests the biodegradation of acacia by Penicillium citrinum and aethiopicum. The expressive results obtained demonstrated that the biodegradation of condensed tannins may be a promising alternative, with the potential to minimize tannery waste.

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Comparison of polyflavonoids in bayberry tanning effluent and commercial bayberry tannin: prerequisite information for vegetable tanning effluent recycling

Cited by 21 publications

References 45 publications

Structural Characteristics and Collagen Reaction Ability of Polyphenols in Larch Tanning Wastewater – an Important Hint for Vegetable Tanning Wastewater Recycling

Structural Characteristics and Collagen Reaction Ability of Polyphenols in Larch Tanning Wastewater – an Important Hint for Vegetable Tanning Wastewater Recycling

Ultrasound-assisted extraction of bayberry tannin and optimization using response surface methodology

BIODEGRADATION OF ACACIA AND CHESTNUT TANNINS BY NATIVE ISOLATES OF THE GENUS Penicillium AND Aspergillus

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