A faster and more effective chrome tanning process assisted by microwave

Zhang, Jinwei; Chen, Wuyong

doi:10.1039/d0ra04189k

Cited by 12 publications

(4 citation statements)

References 21 publications

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“…Other similar studies conducted by Yorgancioglu et al and Ferdous et al also reported the shrinkage temperature of chrome-tanned leather which was 103.5 °C [40] and 105 to 110 °C [41]. Interestingly, the shrinkage temperatures of all manufactured goat leather from the present study were considerably higher than the data reported previously in the literature [40][41][42] following the conventional method which demonstrated that the leather processed with recovered basic chromium salts was hydrothermally more stable.…”

Section: Hydrothermal Stability (Shrinkage Temperature)supporting

confidence: 59%

Recovery and Reuse of Chromium from Tan Yard Solid Waste in Leather Manufacturing

Mottalib,

Chandra,

Naher

et al. 2023

Text Leather Rev

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Chrome tanning is the most popular and widely used method utilizing basic chromium salts in leather processing. Only 60-70% of these salts react with collagen to form leather. The rest remains unreacted being released as toxic waste and causing severe environmental pollution in many developing countries. In the current study, a significant approach was made to utilize solid waste with a clean environment perspective. The chromium was extracted as basic chromium sulfate using H2SO4 from tannery waste and reused in the leather manufacturing procedure. Extracted solid sludge was examined by Atomic Absorption Spectrometry and elemental analysis before and after the separation of chromium (III). It revealed that 97% of chromium was extracted from tan yard sludge. Recovered chromium sulfate was reused in goat skin processing. Batch experiments were carried out by applying recovered basic chromium sulfate, and a combination of fresh and recovered basic chromium sulfate solutions separately. Fresh basic chromium sulfate was used as the control method. The structure and morphology of the final processed leather were characterized by Field Emission Scanning Electron Microscope (FESEM) and Thermogravimetric analysis (TGA). The identical structural morphologies of all processed leather were confirmed in the FESEM study. The physical and chemical characteristics of all finished leather were found very similar. The TGA analysis data proved that raw leather processed by recovered chromium is thermally more stable than others. These research findings signify a new potential effort of separating important chemicals from solid sludge and reusing them. This technique is simple, cost-effective, eco-friendly, and sustainable as it reduces environmental pollution from tannery chromium waste.

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Section: Hydrothermal Stability (Shrinkage Temperature)supporting

confidence: 59%

Recovery and Reuse of Chromium from Tan Yard Solid Waste in Leather Manufacturing

Mottalib,

Chandra,

Naher

et al. 2023

Text Leather Rev

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“…In addition, manufacturers add intentionally metals or metallic compounds to textile products to achieve or improve specific functionalities. As example, approximately 80% of leathers are chrome-tanned [ 1 , 2 ], while vanadium, chromium, barium, lead, copper, cobalt, and nickel are used in textile dyeing [ 3 , 4 ], and iron and manganese are used in bleaching processes [ 5 , 6 ]. In addition, antimony compounds have been demonstrated to enhance the flame retardant properties of halogen compounds and commonly flame-retardant compounds used in textiles preparation [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Metal Content in Textile and (Nano)Textile Products

Rujido-Santos

Herbello-Hermelo

Barciela‐Alonso

et al. 2022

IJERPH

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Metals, metallic compounds, and, recently, metallic nanoparticles appear in textiles due to impurities from raw materials, contamination during the manufacturing process, and/or their deliberate addition. However, the presence of lead, cadmium, chromium (VI), arsenic, mercury, and dioctyltin in textile products is regulated in Europe (Regulation 1907/2006). Metal determination in fabrics was performed by inductively coupled plasma-mass spectrometry (ICP-MS) after microwave-assisted acid digestion. The ICP-MS procedure has been successfully validated; relative standard deviations were up to 3% and analytical recoveries were within the 90–107% range. The developed method was applied to several commercial textiles, and special attention has been focused on textiles with nanofinishing (fabrics prepared with metallic nanoparticles for providing certain functionalities). Arsenic content (in textile T4) and lead content (in subsamples T1-1, T1-2, and T3-3) were found to exceed the maximum limits established by the European Regulation 1907/2006. Although impregnation of yarns with mercury compounds is not allowed, mercury was quantified in fabrics T1-2, T5, and T6. Further speciation studies for determining hexavalent chromium species in sample T9 are necessary (hexavalent chromium is the only species of chromium regulated). Some textile products commercialised in Europe included in this study do not comply with European regulation 1907/2006.

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“…FT-IR results showed that the collagen type I structure including helical structure was maintained when the modified extraction was used to promote the process. 57–60…”

Section: Resultsmentioning

confidence: 99%

Extraction of insoluble fibrous collagen for characterization and crosslinking with phenolic compounds from pomegranate byproducts for leather tanning applications

et al. 2022

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A faster and more effective chrome tanning process assisted by microwave

Abstract: In leather manufacturing, microwave usually has the ability to strengthen the combination between collagen and chemicals and make the corresponding procedures faster and more effective.

Cited by 12 publications

References 21 publications

Recovery and Reuse of Chromium from Tan Yard Solid Waste in Leather Manufacturing

Recovery and Reuse of Chromium from Tan Yard Solid Waste in Leather Manufacturing

Metal Content in Textile and (Nano)Textile Products

Extraction of insoluble fibrous collagen for characterization and crosslinking with phenolic compounds from pomegranate byproducts for leather tanning applications

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