机械活化钢渣负载氧化镁复合材料对废水氮、磷同步吸附性能研究

洪英傑; 赵聪; 彭道平

doi:10.13205/j.hjgc.202511022

机械活化钢渣负载氧化镁复合材料对废水氮、磷同步吸附性能研究

doi: 10.13205/j.hjgc.202511022

西南交通大学环境科学与工程学院, 成都 611756

基金项目:

四川省自然科学基金项目（2025ZNSFSC0440）

详细信息

作者简介:
洪英傑（2000—），男，主要研究方向为固体废物处置与资源化。hyj_chengdu@163.com

通讯作者:
彭道平（1984—），男，副教授，主要研究方向为固体废物资源化、工程水环境效应及其控制。pdp0330@swjtu.edu.cn

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出版历程
- 收稿日期: 2025-02-26
- 录用日期: 2025-04-23
- 修回日期: 2025-03-29
- 网络出版日期: 2026-01-09

Simultaneous adsorption performance of nitrogen and phosphorus from water by mechano-activated steel slag loaded with MgO

Southwest Jiaotong University, Chengdu 611756, China

摘要

摘要: 为从废水中回收营养物质、有效利用钢渣材料，制备了一种负载氧化镁的改性钢渣材料，研究了该材料吸附水中氨氮、磷酸盐的影响因素，对吸附前后的材料进行表征，并结合动力学模型和等温吸附曲线模型探究镁改性钢渣回收氮、磷营养物质的吸附机理。结果表明：当镁改性钢渣投加量为0.1 g/L、初始溶液pH为3.0、吸附时间为360 min、磷酸盐初始浓度为220 mg/L、氨氮初始浓度为100 mg/L时，磷酸盐和氨氮回收率分别为97.39%、79.60%；镁改性钢渣最大吸附容量达到氨氮74.973 mg/g，磷酸盐216.362 mg/g。此外，镁改性钢渣材料对氮、磷的吸附过程能被准二级动力学模型和Langmuir吸附等温线模型较好地描述，表明吸附过程为化学吸附和单分子层吸附，主要产物为鸟粪石沉淀。镁改性钢渣有望成一种具有应用前景的氮、磷回收材料。
- 机械活化钢渣 /
- 磷 /
- 氨氮 /
- 同步回收 /
- 鸟粪石
Abstract: To recover nutrients from wastewater and use steel slag material effectively， this study synthesized a modified steel slag material loaded with magnesium oxide， and probed the factors of adsorbing ammonia nitrogen and phosphate from water solution by this material. This study also analyzed the characterization of magnesium modified steel slag materials before and after adsorption by SEM-EDS， XRD， and RITR， in addition， explored the adsorption mechanism by kinetic model and adsorption isotherm model. The results showed that when the steel slag dosage was equal to 0.1 g/L， initial pH was equal to 3， adsorption time was 360 minutes， phosphate and ammonia nitrogen concentration were 220 mg/L and 100 mg/L， the magnesium-modified steel slag demonstrated a good performance in the simultaneous removal of ammonia nitrogen and phosphate， with maximum removal rates of 79.60% and 97.39% for ammonia nitrogen and phosphate. The maximum adsorption capacity of modified steel slag material was 74.973 mg/g and 216.362 mg/g for ammonia nitrogen and phosphate. Furthermore， it was found that the pseudo-2nd-order kinetic model and the Langmuir temperature adsorption curve model could describe the dynamic process of adsorption well. It indicated that the adsorption processes were chemisorption and molecular layer adsorption， and the final products were mainly struvite， suggesting that magnesium-modified steel slag is expected to become a promising material for nitrogen and phosphorus recovery
- mechano-activated steel slag /
- phosphorus /
- ammonia nitrogen /
- simultaneous recycling /
- struvite

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