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首页> 外文期刊>Journal of Cleaner Production >Reuse of ornamental rock solid waste for stabilization and solidification of galvanic solid waste: Optimization for sustainable waste management strategy
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Reuse of ornamental rock solid waste for stabilization and solidification of galvanic solid waste: Optimization for sustainable waste management strategy

机译：用于稳定和凝固电镀岩固体废物的装饰岩固体废物：可持续废物管理策略的优化

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Hazardous waste management is a current worldwide concern for academics, society, and governmental agencies. The objective of this work is to formulate a composition for Solidification and Stabilization (S/S) of galvanic solid waste, concomitantly with ornamental rock solid waste, with minimal Ordinary Portland Cement (OPC) consumption, without additions and avoiding consumption of energy and environmental resources. A 2(3)-full factorial experimental design focused on the influence of the three studied entrance variables (mass of galvanic solid waste, ornamental rock solid waste, and OPC as well as their interactions) on the response variable: the contaminant retention in the solid matrix. As sustainability was the aim, physical, chemical, and thermal treatment or additions to S/S where executed beforehand. Unconfined compressive strength, leaching, scanning electron microscope-X-ray, and chemical analyses were carried out to support the screening and S/S optimization procedures. Optimization tests at 7 days of curing indicate the 0.06 formulation mass ratio of OPC for each kilogram of wastes successfully reached unconfined compression resistance strength above 1 MPa and 97% of toxic retention. At 24 and 56 days of curing, 3.2 MPa was obtained, and retention efficiencies were 99% for toxic metals and organics, except for aluminum (95%) and iron (98%). The main retention mechanism was correlated to the sorption and electronegative density of the hydroxyl groups from fine particles of ornamental rock solid waste, which are rich in phyllosilicates. Therefore, this novel S/S formulation could contribute to the proper management of hazardous and industrial wastes while avoiding the consumption of energy and resources. (C) 2020 Elsevier Ltd. All rights reserved.
机译：危险的废物管理是目前对学者，社会和政府机构的关注。这项工作的目的是制备用于凝固和稳定（S / S）的电抗固体废物的组合物，伴随着装饰岩固体废物，具有最小的普通波特兰水泥（OPC）消耗，无需添加和避免消耗能量和环境资源。 A 2（3）级造成的实验设计专注于三次研究的入口变量（电流固体废物，观赏岩固体废物和OPC以及它们的相互作用的质量）对响应变量的影响：污染物保留固体矩阵。由于可持续性是预先执行的目的，物理，化学和热处理或添加到S / S。进行了不连续的抗压强度，浸出，扫描电子显微镜-X射线和化学分析，以支持筛选和S / S优化程序。固化7天的优化试验表明每千克废物的OPC的0.06配方质量比成功达到1MPa高于1MPa和97％的毒性保留的压缩强度。在固化24和56天，获得3.2MPa，除铝（95％）和铁（98％）外，毒性金属和有机体的保留效率为99％。主要保留机制与来自装饰岩固体废物的细颗粒的羟基的吸附和电负负密度相关，这些岩石固体废物中富含富含神经硅酸盐。因此，这种新的S / S配方可以促进危险和工业废物的适当管理，同时避免能源和资源消耗。 （c）2020 elestvier有限公司保留所有权利。

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