用铁纳米粒子从盐化影响的水中修复铜:对隔离后的重新调动和聚合物增强重金属稳定性的洞察
Sourjya Bhattacharjee1, Narmada C Nair2,3, Sefeera Sadik3
1Department of Civil and Environmental Engineering, University of Sharjah, Sharjah City, United Arab Emirates. sbhattacharjee@sharjah.ac.ae.
Environmental science and pollution research international
|September 23, 2025
概括
高盐度通过裸体纳米级零价铁 (nZVI) 破坏铜的去除稳定性,但碳氧甲基纤维素功能化nZVI (CMC-nZVI) 保持稳定性. CMC-nZVI在盐水废水中提供了改进的长期重金属整治.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- 人为盐化增加了淡水中的重金属污染.
- 纳米级零价铁 (nZVI) 和CMC-nZVI用于重金属修复.
- 在盐水条件下金属的隔离后稳定性尚不清楚.
研究的目的:
- 在不同盐度下检查裸体和CMC-nZVI的铜封存和稳定性.
- 评估盐水废水中可离子对金属再动员的影响.
- 了解铜再动员的机制和CMC涂层的作用.
主要方法:
- 使用裸体和CMC-nZVI. 的Cu2+进行了减少封存实验.
- NaCl盐度 (0.1-1 M) 和联合离子 (Ca2+,Mg2+,SO42−) 的系统变化.
- 动力建模 (希尔方程) 来确定重新调动半倍 (t1/2).
- 材料表征以阐明重新调动机制.
主要成果:
- 两种nZVI类型在5分钟内实现了>98%的Cu2+封存.
- 盐度显著破坏了被裸体nZVI扣留的铜的稳定性,增加了重新调动.
- CMC-nZVI表现出增强的隔离后稳定性,抑制了穴位和限制了重新调动.
- 盐水废水中的离子适度加快了裸体nZVI的重新移动,但不是CMC-nZVI.
结论:
- 在盐水环境中,CMC涂层显著提高了nZVI对铜的长期稳定性.
- CMC-nZVI 是一种有前途的材料,可以在盐水废水中修复重金属.
- 了解再动员机制对于有效的环境风险评估和治疗设计至关重要.
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