Synthesis of layered double hydroxides derived from blast furnace slag

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-05-26 DOI:10.1016/j.powtec.2025.121165

Bader Bouzar , Zeinab Mkhahal , Nor-edine Abriak , Charlotte Hurel , Mahfoud Benzerzour

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引用次数: 0

Abstract

The objective was to develop an efficient and cost-effective adsorbent to stabilize contaminants present in alternative materials used in civil engineering, such as sediments and fly ash. The synthesis method employed included acidic leaching at a constant pH, followed by precipitation, allowing for the production of LDH. The optimization of synthesis parameters was crucial to determine the boundary conditions for the crystallization of this mineral phase. Among the parameters studied for the optimization of LDH synthesis from blast furnace slag were the concentration of HCl, aging time and temperature, pH during aging, as well as the time and temperature of crystallization. The optimal conditions were identified as an HCl concentration of 4 M, an aging time of 30 min at 90 °C, a pH of 12.5, a crystallization time of 12 h, and a crystallization temperature of 70 °C. The synthesized.

LDH exhibited structural characteristics similar to those observed in other studies, confirming the high quality of the product. This demonstrates that blast furnace slag is a suitable raw material for the synthesis of high quality LDH, while minimizing the formation of undesirable secondary mineral phases.

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以高炉渣为原料合成层状双氢氧化物

其目的是开发一种有效和具有成本效益的吸附剂，以稳定土木工程中使用的替代材料（如沉积物和飞灰）中的污染物。所采用的合成方法包括在恒定pH下酸浸，然后沉淀，允许生产LDH。合成参数的优化是确定该矿相结晶边界条件的关键。研究了以高炉渣为原料合成LDH的最佳工艺参数：HCl浓度、时效时间和温度、时效过程中的pH、结晶时间和温度。最佳工艺条件为：HCl浓度4 M， 90℃下时效时间30 min， pH 12.5，结晶时间12 h，结晶温度70℃。合成。LDH表现出与其他研究中观察到的结构特征相似，证实了该产品的高质量。这表明，高炉渣是合成高质量LDH的合适原料，同时最大限度地减少了不良二次矿物相的形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.