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Leather tanning industry produces large amounts of solid wastes. Chrome tanned leather shaving waste (CTLS) is about 20% of these solid wastes, which has not been utilized in Egypt and causing environmental hazards and economic loss. This current work investigates the properties of new gypsum composite materials containing different percentages of...
Citations
... El wet-blue puede ser utilizado para la creación de nuevos compuestos y dependiendo del material con el que se mezcle se pueden generar diversos materiales con propiedades que permiten aplicaciones específicas. Como por ejemplo, en el sector de la construcción, se han elaborado paneles acústicos a base de virutas de cuero y yeso, material conocido como gypsum (Morsy & Nasr, 2018) y otro tipo de aglomerados (Valdez-Urbina et al., 2019). ...
Las curtiembres son industrias muy contaminantes que liberan compuestos peligrosos, como el cromo, en sus efluentes sólidos y líquidos y gases derivados de la descomposición orgánica en sus efluentes gaseosos, los cuales se liberan al medio ambiente. Según lo que se ha encontrado en bibliografía se puede notar que todos los vertidos sólidos van a parar a los vertederos; mientras, que los efluentes líquidos son tratados, hasta cumplir normas ambientales locales y luego son eliminados en los ríos más cercanos. Es indispensable que se desarrollen tecnologías ecosostenibles e innovadoras para el manejo y eliminación de estos desechos. Pero como el wet-blue es tan estable químicamente, el desarrollo de nuevas tecnologías de reciclaje y/o reúso estos residuos de curtiembres se está convirtiendo en un gran desafío para los investigadores. En la actualidad, los encargados de estudiar estos residuos han empezado a utilizar estos desechos para producir nuevos materiales que simulen las cualidades del cuero o tecnologías que permitan extraer colágeno del wet-blue de la forma más económica. Existen varios trabajos sobre la gestión de residuos de cuero y los que se han utilizado para elaborar este resumen, informan de manera concisa los procesos que se utilizan para reutilizar y/o reciclar el wet-blue. Esta revisión informa por primera vez el estado del arte de las estrategias relacionadas con la recuperación y valorización de estos residuos de cuero y la obtención de colágeno hidrolizado a partir de ellos. En la sección de conclusiones, los autores brindan implicaciones prácticas para la industria con relación al reciclaje del wet-blue.
... It further subjected to characterize for the ash, moisture, fat, chrome oxide, protein content according to the standard protocols described in the official methods of SLC 3, 6, 4, 208, and 7 of 1996, respectively (Lakrafli et al., 2012). Fourier Transform Infrared Spectroscopy (FT-IR) analysis using Thermo Scientific iS50 ABX was also conducted to characterize the chrome shaving (Morsy and Nasr, 2018). ...
... WBS has become a serious environmental burden for Bangladesh with limited safe disposal options. Some treatment methods have been experimented with by the researchers to utilize WBS waste for other useful purposes such as WBS on cement and plaster-based materials (Lakrafli et al., 2012), chrome tanned leather shaving-gypsum composite materials prepared (Morsy & Nasr, 2018). One of these useful purposes is to produce a composite using WBS as well as make a valuable material. ...
... Characterization of wet blue shaving Table 3 shows the properties of collected wet blue shaving. The obtained values were fairly similar to other researchers' literature (Morsy & Nasr, 2018;Tesema, 2018). Characterization of Sand From Fig.5 Uniformity coefficient (Cu) of sand, particle was 2.35, and the coefficient of curvature (Cc) was 1.41. ...
... It can be seen that density reduction (from day 0 to day 28 curing) was ~ 45.04% (from 2307 to 1268 kg/m 3 ) as the wet blue shaving content was increased from 0% to 4%. Similar trends of density have been reported in the case of cement and plaster-based materials containing wet blue shaving (Lakrafli et al., 2012) and Chrome tanned leather shaving-gypsum composite specimens (Morsy and Nasr, 2018) (see also Table 3). The density equivalent of a standard brick in Bangladesh is roughly 1920 kg/m 3 (ASTM C., 2012). ...
The experimental study was conducted to investigate the feasibility of wet blue shaving-sand-cement blocks as an alternative building material for conventional clay brick that can be a better management system for solid wastes in the tannery industry. Wet blue shaving (WBS) is one of the highly generated solid wastes from tanneries. There is no significant utilization of this waste. Preparation of building blocks from WBS incorporated with sand-cement would be a promising avenue for this waste management. Wet blue shavings mixed with sand-cement (cement:sand=1:5) in various proportions (0%, 1%, 2%, and 4% by total dry weight) were used to prepare total 48 building blocks (254mm x 127mm x 76.2mm) and their feasibility as a construction material was appraised based on their physical and mechanical characteristics. The Bangladesh Standards and the American Society for Testing Materials standards (ASTM) were used to assess the engineering qualities of the prepared blocks. Among all the composite block specimens, blocks with 1%, and 2% WBS show 17.65MPa, and 13.87MPa compressive strength, respectively in 28 days of water curing. The costs (1292 BDT/100 blocks) of this type of waste management method were found to be favorable. Due to the usage of clay bricks in abundance with the construction sector, the world requires alternatives to prevent the exploitation of the topsoil that makes the soil lose its fertility. As a result, the wet blue shaving composite block is regarded as an environment-friendly alternative among all disposal methods and would be a potential substitute for fired clay brick.
... It further subjected to characterize for the ash, moisture, fat, chrome oxide, protein content according to the standard protocols described in the official methods of SLC 3, 6, 4, 208, and 7 of 1996, respectively (Lakrafli et al., 2012). Fourier Transform Infrared Spectroscopy (FT-IR) analysis using Thermo Scientific iS50 ABX was also conducted to characterize the chrome shaving (Morsy and Nasr, 2018). ...
