快速而高效的As(III) 从水中去除由双功能的nZVI@NBC
Jiuwan Wang1, Mengfan Chen1, Yulian Han1
1College of Environment, Liaoning University, Shenyang, 110036, People's Republic of China.
Environmental geochemistry and health
|April 9, 2024
概括
纳米级零价值铁 (nZVI) 改性N-化生物炭 (NBC) 复合材料有效地从水中去除有毒 (As(III)). 这种新的nZVI@NBC/氧化硫酸盐 (PDS) 系统在10分钟内实现了99%以上的As(III) 清除,确保了安全的饮用水.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水处理技术水处理技术
背景情况:
- 由于其毒性,水中的 (As) 污染对健康构成重大风险.
- 有效和快速地去除,特别是化 (AsIII),对于确保安全的饮用水供应至关重要.
研究的目的:
- 为了研究纳米级零价值铁 (nZVI) 改性N-化生物炭 (NBC) 复合物 (nZVI@NBC) 激活过氧化硫酸盐 (PDS) 清除的有效性.
- 在各种条件下评估nZVI@NBC/PDS系统的性能,并评估其实际适用性.
主要方法:
- nZVI@NBC磁性复合材料的合成和表征.
- 批量实验通过nZVI@NBC/PDS系统评估As(III) 清除效率.
- 影响因素的调查,包括反应时间,PDS剂量,初始As (III) 度,pH值,共存的离子和天然有机物质.
- 激素火和电子磁共振 (EPR) 分析以阐明反应机制.
主要成果:
- 在初始度为501000μg/L的情况下,nZVI@NBC/PDS在10分钟内实现了99%以上的 (残留<10μg/L) 清除 (残留<10μg/L).
- 该复合材料具有磁性,使其易于分离,并且在各种水矩阵 (脱离离子,自来水,河水,湖水) 中保持高效率 (>99%).
- 硫酸盐基 (SO4−) 和基 (·OH) 被确定为氧化过程中的关键活性物种.
结论:
- 该nZVI@NBC/PDS系统展示了一种高效和快速的方法,用于从污染水中去除.
- 磁性特性和在不同水类中的广泛适用性使nZVI@NBC成为用于实际水疗的有希望的材料.
- 了解激素介导氧化机制为优化先进的氧化过程以去除提供了洞察力.
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