[article]
| Titre : |
Efficient and ecological leather processing : replacement of lime and sulphide with dispase assisted by 1-allyl-3-methylimidazolium chloride |
| Type de document : |
texte imprimé |
| Auteurs : |
Hui Liu, Auteur ; Keyong Tang, Auteur ; Xiumin Li, Auteur ; Jie Liu, Auteur ; Xuejing Zheng, Auteur ; Ying Pei, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
13 p. |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Chaux Sulfurée
Chlorure de 1-allyl-3-méthylimidazolium
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de bovins
Dispaseest une protéase qui clive la fibronectine , le collagène IV et dans une moindre mesure le collagène I. Elle se trouve dans certaines bactéries et peut être isolée à partir de filtrats de culture de Bacillus polymyxa . Il peut être extrait, purifié et utilisé dans la recherche. Il peut être particulièrement utile de séparer les épithéliums embryonnaires et le mésenchyme . La Dispase II est spécifique du clivage des liaisons leucine - phénylalanine .
La Dispase est souvent utilisée pour digérer les cellules primaires adhérentes en culture, car ce traitement s'est avéré plus doux que la digestion à la trypsine. (Wikipedia)
Eaux usées -- Analyse
Epilage
Produits chimiques -- Suppression ou remplacement
Ressources renouvelables
Stabilité hydrothermale
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Leather is a collagen-based biomass prepared from raw skins or hides by a series of unit operations, in which the unhairing and fiber opening are extremely important operations. However, the conventional Na2S/Ca(OH)2 system used in unhairing and fiber opening has given rise to the pollution to the environment. It is necessary to develop substitute technology for the Na2S/Ca(OH)2. In the present study, 1-allyl-3-methylimidazolium chloride ([AMIm]Cl) was used to cooperate with dispase for cycle unhairing and one-pot beamhouse to recycle waste bovine hides and compared with conventional processing. During those processes, the mechanism of [AMIm]Cl-dispase synergistic unhairing and collagen fibers opening were studied. Besides, plant hazard, organic matter and [AMIm]Cl of wastewater from [AMIm]Cl-dispase process were respectively investigated and separated to evaluate the environmental and economic benefits of the [AMIm]Cl-dispase process. As a result, enzyme activity after unhairing by [AMIm]Cl-diapase system for using 5 times is higher than that by KCl-dispase system, and needs lower unhairing time, which is because of rapid penetration of [AMIm]Cl-dispase solution in bovine hides. For this reason, the tensile strength and elastic modulus of tanned leather from [AMIm]Cl-dispase process are higher than those from the KCl-diapase and conventional processes, and its hydrothermal shrinkage temperature is comparable to that of the conventional one. Because of the 58.13% lower wastewater discharge (WD), 66.60% lower total solids (TS), 97.23% lower ammonia nitrogen (NH3-N), non-toxic wastewater and organic matter recovery in wastewater are reached from [AMIm]Cl-dispase process, which is expected to be an alternative to the conventional process to reduce environmental pollution and realize the sustainable development of technology for leather manufacturing. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Experimental and conventional processes - Investigation of the dispase penetration by FITC - Organic matter and saline solution separation in wastewater - The harm of wastewater to plant growth
- RESULTS AND DISCUSSION : Effect of [AMIm]Cl-dispase synergistic cycle unhairing - Effect of [AMIm]Cl-dispase ecological beamhouse - Hydrolysis of interfibrillar substance in hides - Distribution of dispase - Mechanism of one-pot beamhouse and recovery of organic matter in wastewater - Grain morphology and collagen fibers aggregation structure of tanned leathers - Physical and hydrothermal properties of tanned leather - Environmental and economic benefits
Table 1 : Physical properties and hydrothermal stability of tanned leathers from conventional (C), KCl-dispase (KCl/D) and [AMIm]Cl-dispase ([AMIm]Cl/D) processes
- Table 2 : Pollutant loads and wastewater discharge (WD) from different methods (unit: kg/t of raw hide) |
| DOI : |
https://doi.org/10.1186/s42825-022-00086-3 |
| En ligne : |
https://link.springer.com/content/pdf/10.1186/s42825-022-00086-3.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37580 |
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 4 (Année 2022) . - 13 p.
[article]
|
Aller sur edunet
Accueil
Efficient and ecological leather processing : replacement of lime and sulphide with dispase assisted by 1-allyl-3-methylimidazolium chloride in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
