Article
Environmental Sciences
Dongyu Hao, Xuechuan Wang, Shuang Liang, Ouyang Yue, Xinhua Liu, Dongyan Hao, Xugang Dang
Summary: Currently, 90% of the tannery globally still uses chrome tanning, which leads to chromium-containing wastewater and solid waste that are harmful to the environment. This study developed an organic chrome-free tanning agent, CP-EGDE, by extracting collagen polypeptide from chromium-containing waste leather and modifying it with ethylene glycol diglycidyl ether. CP-EGDE demonstrated superior properties in leather tanning and wastewater treatment, with high performance in terms of tanned leather quality and degradability of tannery wastewater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Dongyu Hao, Xuechuan Wang, Xinhua Liu, Rongrong Su, Zhengjun Duan, Xugang Dang
Summary: A biomass-based chrome-free tanning agent DCST-EGDE was successfully synthesized, verified by various analytical techniques, and shown to effectively replace chromium tanning agents, improving the mechanical properties, whiteness, and overall performance of leather.
Article
Green & Sustainable Science & Technology
Wei Ding, Haiteng Liu, Javier Remon, Zhicheng Jiang, Guodong Chen, Xiaoyan Pang, Zhiwen Ding
Summary: The traditional chrome-based leather industry is facing restrictions due to environmental risks, but using carbon-neutral aldehyde tanning agent and aluminum tanning treatment can produce high-quality leather with similar or better properties and environmental friendliness.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Jiabo Shi, Ruizhen Zhang, Zhiyuan Mi, Siqi Lyu, Jianzhong Ma
Summary: The study introduces a sustainable chrome-free leather processing system based on Tara tannins, Laponite, and BN, which significantly enhances the hydrothermal stability of the leather.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Jianzhong Ma, Na Yang, Yun Li, Dangge Gao, Bin Lyu, Jing Zhang
Summary: By using polycarboxylate/montmorillonite nanocomposite, a cleaner approach to chrome-less tanning for cattle hide upper suede leather has been developed, reducing chromium load in wastewater and maintaining stable properties of the leather.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Xinhua Liu, Youyou Wang, Xuechuan Wang, Tengfei Han, Wanni Wang, Huie Jiang
Summary: This study demonstrated the potential of using EHBP for salt-free pickling and chrome-free tanning processes, which can produce environmentally friendly leather without compromising its quality.
Review
Chemistry, Multidisciplinary
Mohammad Mahbubul Hassan, Jane Harris, James J. C. Busfield, Emiliano Bilotti
Summary: This article critically reviews various tanning methods used in the leather industry and studied in the laboratory, outlines their advantages and disadvantages, and compares the consumption of tanning agents, chemicals, water, and the tanning performance and mechanical properties of the processed leather. The reaction mechanisms of novel tanning agents with leather collagens and the future directions to make leather tanning more sustainable are also outlined.
Review
Chemistry, Multidisciplinary
Mohammad Mahbubul Hassan, Jane Harris, James J. C. Busfield, Emiliano Bilotti
Summary: Leather, made of collagen protein polymer, is widely used in various products. The tanning process, which converts animal skins into leather, is crucial but also hazardous due to the use of toxic chemicals. Chromic sulphate tanning is the most effective and widely used method, but it produces harmful effluent. Various sustainable alternatives have been developed, but they are less effective or expensive. This comprehensive review critically evaluates different tanning methods, discusses their advantages and disadvantages, and outlines future directions for more sustainable leather materials.
Article
Chemistry, Multidisciplinary
Yue Yu, Yirui Lin, Yunhang Zeng, Ya-nan Wang, Wenhua Zhang, Jianfei Zhou, Bi Shi
Summary: Life cycle assessment was used to compare the environmental impacts of chrome tanning, chrome-free metal tanning, and metal-free tanning systems for leather production. The results showed that the metal-free tanning system had the lowest environmental impacts, making it a more sustainable choice for leather production.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Xinhua Liu, Youyou Wang, Xuechuan Wang, Huie Jiang
Summary: A series of epoxy-terminated hyperbranched poly-(amine-ester) materials (EHBPs) were synthesized and proved to be a promising tanning agent for environmentally benign leather manufacturing, with significantly improved leather properties, enhanced porosity and preferable biodegradability.
Article
Chemistry, Multidisciplinary
Hongda Fang, Min Zhou, Xinru Li, Yidong Mi, Hailei Su, Xuesong Liu, Fanfan Wang, Haiyan Chen, Yuan Wei
Summary: This study investigates the synthesis of chrome-tanning agent from chromate wastewater using glucose as a reducing agent. The results show that the optimal condition can produce a chrome-tanning agent with satisfactory Cr2O3 content and alkalinity for industrial usage. The pilot-scale experiment exhibits outstanding performance similar to the lab-scale results.
Article
Environmental Sciences
Renganath Rao Ramesh, Muthukumaran Ponnuvel, Sathya Ramalingam, Aravindhan Rathinam
Summary: This research focuses on the use of glyoxal and synthetic tanning agents as a replacement for inorganic tanning systems, aiming to improve the strength properties of leather and reduce environmental impact. The glyoxal tanning process was optimized, leading to better quality of thin leather and easily treatable wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Agricultural Engineering
Mi Gao, Yidan Tang, Wei Ding, Zhicheng Jiang, Bi Shi
Summary: This study explores a green method to use polysaccharides in food waste fermentation residues as a masking agent for chrome-free leather tanning. The polysaccharides are efficiently degraded into oxidized oligosaccharides in a microwave-assisted AlCl3-H2O2 system and used together with zirconium salts for leather tanning. The oxidized oligosaccharides exhibit a remarkable masking effect and increase the shrinkage temperature and tear strength of the tanned leather.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Environmental Sciences
Anna Lanzetta, Stefano Papirio, Armando Oliva, Alessandra Cesaro, Luca Pucci, Emanuele Mariano Capasso, Giovanni Esposito, Francesco Pirozzi
Summary: The study investigates the use of ozone for decolorization of tannery wastewater and urban wastewater effluents. High color removal efficiencies (>90%) were achieved with a 45 min ozone contact time and pH 10. The cost evaluation of implementing ozonation in the wastewater treatment plant showed a significant increase in energy cost, suggesting the need for cost-competitive strategies.
Article
Green & Sustainable Science & Technology
Dongyu Hao, Xuechuan Wang, Ouyang Yue, Shuang Liang, Zhongxue Bai, Jin Yang, Xinhua Liu, Xugang Dang
Summary: In this study, a wrench-like, antimicrobial, amphoteric, epoxy-terminated, organic chrome-free tanning agent (HHTT-EGDE-CP) was prepared using HHTT, EGDE, and CP. The tanning agent exhibited excellent physicochemical properties, absorptivity of anionic wet finishing materials, and long-term and efficient antibacterial properties against E. coli, S. aureus, A. flavus, and Asp. niger. This innovative technique offers new perspectives for the sustainable development of industrial manufacturing.
JOURNAL OF CLEANER PRODUCTION
(2023)
