Adsorption Removal of Organophosphates from Water by Steel Slag: Modification, Performance, and Energy Site Analysis

IF 1.4 4区环境科学与生态学 Q4 WATER RESOURCES

Water SA Pub Date : 2024-11-03 DOI:10.3390/w16213145

Wei Wu, Yiming Nie, Zhixin Wang, Tianyin Huang, Xiaoyi Xu, Hanhan Liu, Pei‐Rong Li, Bingdang Wu

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引用次数: 3

Abstract

Organophosphates are a type of emerging environmental contaminant, which can be removed effectively by adsorption. Here, modified steel slag was examined for its adsorptive performance in the removal of hydroxyethylidene diphosphonic acid (HEDP) from water. Compared to acid (55.3%, maximum removal rate) and base (85.5%) modification, high-temperature modification (90.6%) significantly enhanced steel slag’s adsorption capacity for HEDP, surpassing that of unmodified slag (71.2%). Kinetic analyses elucidated a two-phase adsorption process—initial rapid adsorption followed by a slower equilibrium phase. The results of adsorption energy analysis showed that modified steel slag preferentially occupied the sites with higher energy, which promoted the adsorption. After five regeneration cycles, the adsorption properties of the material were not significantly reduced, which indicates that the material has good application potential. Microscopic and spectroscopic techniques, including SEM-EDS, FTIR, and XPS, were employed to uncover the surface chemistry and structural changes responsible for the enhanced adsorption efficiency. The adsorption mechanism of HEDP on steel slag is a complete process guided by hydrogen bonding interactions, strengthened surface complexation, and optimized ligand exchange. This study advances the sustainable utilization of industrial waste materials and contributes significantly to the development of innovative water treatment technologies.

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钢渣吸附去除水中的有机磷酸盐：改性、性能和能量场分析

有机磷是一种新兴的环境污染物，可通过吸附法有效去除。本文研究了改性钢渣对水中羟乙基二膦酸（HEDP）的吸附性能。与酸改性（最大去除率55.3%）和碱改性（最大去除率85.5%）相比，高温改性（90.6%）显著提高了钢渣对HEDP的吸附能力，超过了未改性钢渣（71.2%）。动力学分析表明该吸附过程为两相吸附，即开始快速吸附后为较慢的平衡相。吸附能分析结果表明，改性钢渣优先占据能量较高的位置，促进了吸附。经过5次再生循环后，材料的吸附性能没有明显下降，表明该材料具有良好的应用潜力。显微镜和光谱技术，包括SEM-EDS， FTIR和XPS，揭示了导致吸附效率提高的表面化学和结构变化。HEDP在钢渣上的吸附机理是一个氢键相互作用、表面络合强化、配体交换优化的完整过程。该研究促进了工业废水的可持续利用，对创新水处理技术的发展具有重要意义。

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

Water SA 环境科学-水资源

CiteScore

2.80

自引率

6.70%

发文量

审稿时长

18-36 weeks

期刊介绍： WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).