Hydrated Nano-Blast Furnace Slag: A Green and Efficient Adsorbent for Industrial Wastewater Treatment

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2025-09-05 DOI:10.1007/s11837-025-07692-6

M. M. Sadawy, Saad. M. Fayed, Hani E. Sharafedin, A. I. Salem, Ahmed Hosny, Shengli Li

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Abstract

This study investigated the efficiency of hydrated nanoscale blast furnace slag (NBFS) as a cost-effective and sustainable adsorbent for removing iron, copper, and zinc ions from wastewater. The NBFS was modified through a dual process involving nanoscale transformation and hydration with water (20 wt.%) for 7 days, enhancing its surface area and reactivity. The hydrated NBFS was characterized using XRF, SEM, EDS, FTIR, and XRD techniques, revealing its amorphous to crystalline transformation and the presence of OH⁻ as a functional group. Batch adsorption experiments were conducted to optimize the parameters of adsorbent dosage, pH, contact time, initial ion concentration, and temperature. The results demonstrated remarkable removal efficiencies of 99.4% for Fe, 96.2% for Cu, and 93.7% for Zn at an optimal pH of 6, a contact time of 90 min, and a temperature of 70 °C. The adsorption process followed pseudo-second-order kinetics and the Langmuir isotherm model, indicating a chemisorption mechanism with monolayer coverage. Thermodynamic studies confirmed that the adsorption process was spontaneous. Additionally, the hydrated NBFS exhibited excellent reusability, maintaining a high removal efficiency over five consecutive adsorption-desorption cycles.

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水合纳米高炉渣：一种绿色高效的工业废水处理吸附剂

本研究考察了水合纳米级高炉渣（NBFS）作为一种经济、可持续的吸附剂去除废水中的铁、铜和锌离子的效率。通过纳米级转化和与水（20% wt.%）水化7天的双重过程对NBFS进行改性，增强了其表面积和反应性。利用XRF、SEM、EDS、FTIR和XRD等技术对水合NBFS进行了表征，揭示了NBFS从无定形到结晶的转变以及OH−作为官能团的存在。通过批量吸附实验，优化了吸附剂用量、pH、接触时间、初始离子浓度、温度等参数。结果表明，在最佳pH为6、接触时间为90 min、温度为70℃的条件下，Fe、Cu和Zn的去除率分别为99.4%、96.2%和93.7%。吸附过程符合拟二级动力学和Langmuir等温线模型，表明其为单层覆盖的化学吸附机制。热力学研究证实了吸附过程是自发的。此外，水合NBFS具有良好的可重复使用性，在连续5次吸附-解吸循环中保持了较高的去除效率。

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

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.