An ultrasonic-ionic liquid process for the efficient acid catalyzed hydrolysis of feather keratin

Ding, Song; Sun, Yang; Chen, Hongyue; Xu, Chao; Hu, Yi

doi:10.1016/j.cjche.2018.05.008

Cited by 26 publications

(10 citation statements)

References 20 publications

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“…The addition of different co-solvents (e.g., NaHSO 3 , Na 2 SO 3 , SDS, urea, and caprolactam) can shorten the dissolution time [ 40 , 41 , 42 ]. Additionally, some researchers have used microwave radiation and sonication technology-assisted ionic liquid methods to extract livestock keratin, with excellent results [ 43 , 44 , 45 ]. Zhang et al indicated that at least 65% of keratin disulfide bonds should be cleaved to facilitate dissolution in ILs.…”

Section: Methods For the Valorization Of Livestock Keratinmentioning

confidence: 99%

Valorization of Livestock Keratin Waste: Application in Agricultural Fields

Chen

Gao

et al. 2022

IJERPH

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Livestock keratin waste is a rich source of protein. However, the unique structure of livestock keratin waste makes its valorization a great challenge. This paper reviews the main methods for the valorization of livestock keratin waste, which include chemical, biological, and other novel methods, and summarizes the main agricultural applications of keratin-based material. Livestock keratin waste is mainly used as animal feed and fertilizer. However, it has promising potential for biosorbents and in other fields. In the future, researchers should focus on the biological extraction and carbonization methods of processing and keratin-based biosorbents for the soil remediation of farmland.

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Section: Methods For the Valorization Of Livestock Keratinmentioning

confidence: 99%

Valorization of Livestock Keratin Waste: Application in Agricultural Fields

Chen

Gao

et al. 2022

IJERPH

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“…The extraction of keratin performed in the presence of hydrochloric acid implies high concentration (usually 12 M) of hydrochloric acid, high temperature (110 °C), and a long hydrolysis time (12 h) [ 68 ].…”

Section: Methods For the Valorization Of Keratins By Extractionmentioning

confidence: 99%

Closing the Loop with Keratin-Rich Fibrous Materials

et al. 2021

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One of the agro-industry’s side streams that is widely met is the-keratin rich fibrous material that is becoming a waste product without valorization. Its management as a waste is costly, as the incineration of this type of waste constitutes high environmental concern. Considering these facts, the keratin-rich waste can be considered as a treasure for the producers interested in the valorization of such slowly-biodegradable by-products. As keratin is a protein that needs harsh conditions for its degradation, and that in most of the cases its constitutive amino acids are destroyed, we review new extraction methods that are eco-friendly and cost-effective. The chemical and enzymatic extractions of keratin are compared and the optimization of the extraction conditions at the lab scale is considered. In this study, there are also considered the potential applications of the extracted keratin as well as the reuse of the by-products obtained during the extraction processes.

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“…The commonly used protein dissolution methods are normally ineffective for the solubilization of keratin. To overcome the disulfide bonds, the dissolution and extraction of keratin can be accomplished using oxidative and reductive chemistries [61], ultrasonic treatment [62], and alkali hydrolysis. Extraction of keratin has also been accomplished using ionic liquids (ILs) [63,64] and deep eutectic solvents (DES) [65,66] with powerful dissolving properties.…”

Section: Keratinmentioning

confidence: 99%

Waste Reutilization in Polymeric Membrane Fabrication: A New Direction in Membranes for Separation

2021

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In parallel to the rapid growth in economic and social activities, there has been an undesirable increase in environmental degradation due to the massively produced and disposed waste. The need to manage waste in a more innovative manner has become an urgent matter. In response to the call for circular economy, some solid wastes can offer plenty of opportunities to be reutilized as raw materials for the fabrication of functional, high-value products. In the context of solid waste-derived polymeric membrane development, this strategy can pave a way to reduce the consumption of conventional feedstock for the production of synthetic polymers and simultaneously to dampen the negative environmental impacts resulting from the improper management of these solid wastes. The review aims to offer a platform for overviewing the potentials of reutilizing solid waste in liquid separation membrane fabrication by covering the important aspects, including waste pretreatment and raw material extraction, membrane fabrication and characterizations, as well as the separation performance evaluation of the resultant membranes. Three major types of waste-derived polymeric raw materials, namely keratin, cellulose, and plastics, are discussed based on the waste origins, limitations in the waste processing, and their conversion into polymeric membranes. With the promising material properties and viability of processing facilities, recycling and reutilization of waste resources for membrane fabrication are deemed to be a promising strategy that can bring about huge benefits in multiple ways, especially to make a step closer to sustainable and green membrane production.

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An ultrasonic-ionic liquid process for the efficient acid catalyzed hydrolysis of feather keratin

Cited by 26 publications

References 20 publications

Valorization of Livestock Keratin Waste: Application in Agricultural Fields

Valorization of Livestock Keratin Waste: Application in Agricultural Fields

Closing the Loop with Keratin-Rich Fibrous Materials

Waste Reutilization in Polymeric Membrane Fabrication: A New Direction in Membranes for Separation

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