A smart high chrome exhaustion and chrome-less tanning system based on chromium (III)-loaded nanoparticles for cleaner leather processing

Zhu, Ruixin; Yang, Chun Yen; Li, Kaijun; Yu, Ruiquan; Liu, Gongyan; Peng, Biyu

doi:10.1016/j.jclepro.2020.123278

Cited by 22 publications

(18 citation statements)

References 36 publications

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“…The tanning, retanning, and fatliquoring effluents were the main sources of EP because of the incomplete uptake of tanning agents, retanning agents, and fatliquors . For this reason, high exhaustion tanning, retanning, and fatliquoring agents and their matching processing conditions are strongly encouraged to be developed for reducing the environmental impact of leather processing. − …”

Section: Resultsmentioning

confidence: 99%

Life Cycle Assessment for Chrome Tanning, Chrome-Free Metal Tanning, and Metal-Free Tanning Systems

Lin

Zeng

et al. 2021

ACS Sustainable Chem. Eng.

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Life cycle assessment (LCA) was applied to compare environmental impacts of a chrome tanning system (CTS) using basic chrome sulfate (Cr), a chrome-free metal tanning system (CFMTS) using complexes of highly oxidized starch and Al−Zr (HOS−AZ), and a metal-free tanning system (MFTS) using oxidized sodium alginate (OSA). The preparation processes of Cr, HOS−AZ, and OSA were first evaluated by LCA to make the life cycle inventory available for their tanning systems. Life cycle impact assessment results showed that Cr, HOS−AZ, and OSA were the most significant substance factors in their tanning operations. The tanning operation was the main contributor to the environmental impacts of a tanning system followed by retanning and fatliquoring operations. The environmental impacts on resource consumption and climate change presented CTS > CFMTS > MFTS, while those on ecosystem quality and human health were comparable. The MFTS is a more sustainable tanning system for leather production. This work provides basic data support for the ecological design of leather products and gives new insights into the LCA of complex leather processing systems.

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Section: Resultsmentioning

confidence: 99%

Life Cycle Assessment for Chrome Tanning, Chrome-Free Metal Tanning, and Metal-Free Tanning Systems

Lin

Zeng

et al. 2021

ACS Sustainable Chem. Eng.

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“…Kulit yang disamak menggunakan krom memiliki stabilitas termal yang sangat baik, mempunyai suhu pengkerutan di atas 100 o C dan mempunyai sifat mekanik yang luar biasa. Penyamakan krom adalah proses yang paling penting dan dominan dalam pembuatan kulit (Zhu, et al, 2020).…”

Section: Hasil Dan Pembahasan Kulit Samak Krom Dan Persyaratan Mutuunclassified

“…Masalah pencemaran kromium yang ada merupakan tantangan bagi para peneliti untuk mengembangkan sistem penyamakan alternatif yang meminimalkan kadar kromium limbah (Li, et al, 2019b;Ashokkumar, et al, 2012). Untuk memecahkan masalah pencemaran kromium secara mendasar, telah dilakukan aplikasi penyamakan bebas krom untuk mencapai proses penyamakan hijau (green tanning process) (Zhu, et al, 2020), seperti penyamakan logam non-krom (Qiang, et al, 2019), penyamakan aldehida (Sun, et al, 2018), penyamakan menggunakan tanin sintetis (Beghetto, et al, 2019;(Ferrero, et al, 2015). Namun, penyamakan kulit bebas krom ini mempunyai kekurangan, seperti stabilitas hidrotermal rendah, terbentuknya formaldehida bebas yang karsinogenik dan berbau menyengat sehingga kulitnya tidak dapat diterima pasar (Zhu, et al, 2020).…”

Section: Hasil Dan Pembahasan Kulit Samak Krom Dan Persyaratan Mutuunclassified

Bahaya Kromium Hexavalen (Cr VI) Pada Kulit Dan Produk Kulit Samak Krom Serta Upaya Pencegahannya

Murti

Sugihartono

2020

j.res.technol.ind.

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“…Keratin present in tannery hair wastes has been utilized for several industrial applications such as leather and textile processing and agriculture input [2,5,[17][18][19], the development of keratin-based biomaterials platform [2,13], pharmaceutical and cosmetic application [17,[20][21][22]]. Another study which was conducted by using sheep wool as raw material, alkaline as a hydrolysing agent, and temperatures of 75, 85, 95, and 99 °C reported a percentage yield of 87% using 8% NaOH at 95 °C [18].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Keratin Hydrolysate Extraction from Tannery Sheep Hair Waste

Mengistu

Angassa

Tessema

2023

International Journal of Chemical Engineering

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Tannery hair wastes are becoming a challenge for tanners regarding environmental pollution control and human health. In this study, an experiment had been designed to hydrolyse sheep hair in an alkaline medium, and the operational condition for the alkaline extraction of KH has been modeled and optimized. The structure, morphology, functional groups, particle size, and molecular mass of the KH extracts were evaluated experimentally by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), particle size analysis, and SDS-PAGE analysis, respectively. FTIR analysis of the extract confirmed the presence of carboxylic, amide, and aldehyde functional groups and alkyl side chains of amino acids. The molecular weight of the extracted keratin ranges between 3–15 kDa, and X-ray diffraction (XRD) analysis showed an amorphous form of structure with two peaks at 2 theta of 9.36° and 21.16° due to α -helix and β - sheet structure in keratin. Response surface methodology (RSM) coupled with BOX-Behnken design was applied as a statistical tool to investigate the effect of extraction time, the concentration of the hydrolysing agent, and temperature on the response variable (yield of keratin protein). The concentration of the hydrolysing agent was found to be the most significant factor affecting the speed of extraction, but its gradual increase tends to affect the protein content of the extract. Optimum parameters of 0.5 N, 80°C, and 3.5 hr were obtained for the concentration of NaOH, temperature, and extraction time, respectively, with a maximum average protein yield of 91.5% and a percentage total nitrogen content of 14.6% using the Kjeldahl method and 86.57% using the biuret test method.

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A smart high chrome exhaustion and chrome-less tanning system based on chromium (III)-loaded nanoparticles for cleaner leather processing

Cited by 22 publications

References 36 publications

Life Cycle Assessment for Chrome Tanning, Chrome-Free Metal Tanning, and Metal-Free Tanning Systems

Life Cycle Assessment for Chrome Tanning, Chrome-Free Metal Tanning, and Metal-Free Tanning Systems

Bahaya Kromium Hexavalen (Cr VI) Pada Kulit Dan Produk Kulit Samak Krom Serta Upaya Pencegahannya

Optimization of Keratin Hydrolysate Extraction from Tannery Sheep Hair Waste

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