使用造粉去除:特征,吸附机制和在酸性矿井排水处理中的应用
Hyunsoo Kim1, Bumjun Kim2, Myoungsoo Ko2
1Department of Energy and Resource Engineering, Chosun University, Gwang-ju 61452, Korea.
Environmental research
|June 24, 2025
概括
造粉尘通过吸附和氧化还原反应有效地从水中去除 (As). 这种磁性材料可回收利用,可降低含量低于监管标准,为污染水提供可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 水中的污染对健康构成重大风险.
- 有效和可持续的去除方法至关重要.
- 造粉 (FD) 是金属造的副产品,富含Si,Fe和Ca,具有磁性.
研究的目的:
- 为了研究造粉尘 (FD) 从水溶液中去除 (As) 的有效性.
- 描述吸附机制和影响因素 (例如pH).
- 为了评估FD在现实世界污染水中的性能 (酸性矿井排水).
主要方法:
- 进行了批量吸附实验,以确定使用Langmuir模型的As (III) 和As (V) 吸附能力.
- 研究了pH对As去除效率的影响.
- 通过对联体交换,沉和氧化还原反应的分析,探索了As去除的机制.
- 实验使用实际的酸性矿井排水 (AMD) 样本进行.
主要成果:
- 造粉尘的最大吸附能力为5.15毫克/克的酸 (III) 和9.34毫克/克的酸 (V).
- 在pH范围3-9中观察到有效As去除,在pH值更高时容量增加.
- 氧化物被证明具有作为氧化剂/减氧剂的双重作用,为 (III) 和 (V) 提供了不同的去除途径.
- 在AMD测试中,FD成功降低了As度,低于韩国监管标准的0.05 mg/L.
结论:
- 造粉尘是一种高效且可回收的吸附剂,用于去除 (III) 和 (V).
- 它的磁性特性使其易于分离和重复使用,提高了其可持续性.
- 在AMD等受污染的水源中,FD提供了一种可行的解决方案,通过联合吸附和氧化还原机制,对进行补救.
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