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Leather shaving dust utilization in brick preparation: Solid waste management in tannery
Construction and Building Materials ( IF 7.4 ) Pub Date : 2023-08-05 , DOI: 10.1016/j.conbuildmat.2023.132769
Md. Abul Hashem , Md. Enamul Hasan Zahin , Md. Sanaul Haque , Md. Shohag Milu , Md. Anik Hasan , Sofia Payel

In the tannery, after sammying and splitting, the flesh side of wet-blue leather is shaved getting a uniform thickness known as shaving. During shaving, a significant amount of chromium-containing leather shaving dust (LSD) is generated. It affects the environment and the management of chromium-containing LSD is a great challenge. In this work, LSD is used in brick production mitigating the generated solid waste in a tannery. The LSD (w/w) of 0%, 2%, 3%, 4%, 5%, 6%, and 7% are incorporated along with clay and burned at 1000 °C in the brickfield. The outcome discloses 4% LSD amended brick showed the maximum engineering and chemical properties. The optimum 4% LSD amended brick’s weight loss, shrinkage area, water absorption, compressive strength, and efflorescence properties to be 11.38%, 5.51%, 14.26%, 10.69 N/mm2, and no efflorescence, respectively. The Scanning Electron Microscope (SEM) images denote the micro-fibrous structure of the composite that played a significant role in producing lightweight brick. The NEN 7345 leaching test of the LSD-incorporated bricks indicated that leached metals were below the acceptable limit. Utilization of LSD will open an eye as an ingredient in brick production, to mitigate tannery solid waste load.



中文翻译:

制砖过程中皮革刨花粉尘的利用:制革厂的固体废物管理

在制革厂中,经过浸水和剖层后,蓝湿皮的肉面被削去,获得均匀的厚度,称为削面。剃须过程中会产生大量含铬的皮革剃须粉尘(LSD)。它对环境造成影响,含铬LSD的管理是一个巨大的挑战。在这项工作中,LSD 用于砖块生产,以减少制革厂产生的固体废物。将 0%、2%、3%、4%、5%、6% 和 7% 的 LSD(w/w)与粘土一起掺入,并在砖场中于 1000 °C 下燃烧。结果表明,4% LSD 改性砖显示出最大的工程和化学性能。最佳4%LSD修正砖的失重、收缩面积、吸水率、抗压强度和风化性能分别为11.38%、5.51%、14.26%、10.69 N/mm 2,并且没有风化。扫描电子显微镜 (SEM) 图像显示了复合材料的微纤维结构,该结构在轻质砖的生产中发挥了重要作用。对掺有 LSD 的砖进行的 NEN 7345 浸出测试表明,浸出的金属低于可接受的限度。LSD 的利用将让人们大开眼界,将其作为砖块生产的一种成分,以减轻制革厂的固体废物负荷。

更新日期:2023-08-05
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