Published October 30, 2021 | Version v1
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Industrial Gelatin from Leather Chrome Shavings Wastes

Creators

  • 1. Chemistry of Tanning Materials and Leather Technology Department, Chemical Industries institute, National Research Center, Dokki, Cairo, 12331, Egypt

Contributors

Researcher:

  • 1. Chemistry of Tanning Materials and Leather Technology Department, Chemical Industries institute, National Research Center, Dokki, Cairo, 12331, Egypt

Description

A step towards minimizing the environmental pollution of leather tanning , leather chrome shavings wastes were treated with Li2CO3 to extract technical or industrial gelatin as an added value material. Isolation and characterization of gelatin obtained from chrome-tanned shavings were done. The alkali hydrolysis products obtained, showed good physical and chemical properties in terms of gel strength, swelling and thermal stability. The optimum hydrolysis conditions using Li2CO3 were found to be 5 hr. extraction at 80°C, swelling time of one day and pH 9.5. The yield was over one third of the original starting waste material.

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Additional details

References

  • HP Germann. The evolution of the unhairing process as influenced by technological, economic and ecological considerations. J Am Leather Chem Assoc. 1997;92:84-92. Heidemann E. Disposal and recycling of chrome-tanned materials. J Am Leather Chem Assoc. 1991;86(9):331-333. https://tinyurl.com/9y29cf3j Wainewright. Physical tests for gelatin and gelatin products. The science and technology of gelatin. New York Academic Press. 1977;507-534. Regenstein, Zhou, Regenstein. Determination of total protein content in gelatin solutions with the Lowry or Biuret Assay. Journal of Food Science. 2006;71(8):474-479. https://tinyurl.com/yrcbadkf Font, Gomis, Fernandez, Sabater. Physico-Chemical characterization and leaching of tannery wastes. Waste Management research. 1998;16:139. https://tinyurl.com/5d8nekmj Mohamed, Sayed NHEl, Abdel hakim AA. Preparation and characterization of polyamide-leather waste polymer composites. Journal of Applied Polymer Science. 2010;118(1):446-451. https://tinyurl.com/yuvy3d54 Gareis. Gelatin Handbook: Theory and industrial practice. Weinheim: Wiley-VCH. 2007;163-299. https://tinyurl.com/zncpvbxa Gudmunâsson, Hafsteiasson. Gelatin from cod skins as affected by chemical treatments. J Food Science. 1997;62(1):37. https://tinyurl.com/kpu7m574 Fernandez, Montero, Gomez. Gel properties of collagens from skins of cod (Gadus morhua) and hake (Merluccius merluccius) and their modification by coenhancers mangnesium sulphate, glycerol and transglutaminse. Food chemistry. 2001;74:161-167. https://tinyurl.com/2y7x7swa Ockerman, Hansen. In: Animal by- product and utilization. 2000;1-354. Soleimani, Sadeghi, Shahsavari. Graft copolymerization of Gelatin-g-poly (Acrylic acid-co-Acrylamide) and calculation of grafting parameters. Indian Journal of Science and Technology. 2012;5:2041-2046. https://tinyurl.com/3n6wmzuv AOAC, W Horwitz, Official methods of analysis of the Association of Official Analytical Chemists. Washington DC, USA: AOAC. 2000. https://tinyurl.com/ywmr9pfc

Subjects

Environmental Sciences.
https://www.jelsciences.com/environment-science.php