一个具有逆氧活性的二硫化过器,能够满足严格的六价饮用水准则
Anushka Mishrra1, Monong Wang1, Kelly M Conway1
1Department of Civil and Environmental Engineering, University of California at Berkeley, Berkeley, California 94720, United States.
Environmental science & technology
|October 7, 2025
概括
一个新的二硫化物 (MoS2) 纳米粒子过器在棉花上有效地从饮用水中去除有毒的六价 (Cr[VI]). 移除氧气显著增加了过器的容量,并减少了释放,提供了一个经济有效的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- 六价 (Cr[VI]) 即使在低暴露水平下,也会给健康带来风险.
- 传统的Cr[VI]去除方法往往是昂贵和复杂的.
- 需要廉价且可靠的技术来处理饮用水中的Cr[VI].
研究的目的:
- 开发一种具有成本效益的过介质,用于从饮用水中去除Cr[VI].
- 为了研究二硫化物 (MoS2) 纳米颗粒在棉上的Cr[VI]封存的性能.
- 为了优化处理条件,提高Cr[VI]去除效率并减少出水.
主要方法:
- 通过将MoS2纳米颗粒附在棉花中制造过介质.
- 在各种条件下测试过器的Cr[VI]去除能力,包括存在或不存在溶解氧.
- 评估氧气去除对MoS2-棉花容量和释放的影响.
- 使用稀释的盐酸评估过介质的可再生性.
主要成果:
- 这种MoS2棉过器有效地将Cr[VI]降低到毒性较低的Cr[III],并将其隔离起来.
- 溶解的氧气竞争了还原点,降低了Cr[VI]的去除能力,增加了的释放.
- 从水中去除氧气提高了MoS2-棉花的容量超过10倍,并减少了80%以上的释放.
- 在Cr[VI]突破后,通过储存在稀释的盐酸中恢复过器的活性.
结论:
- 与现有技术相比,MoS2-cotton为Cr[VI]清除提供了一个有吸引力的,低成本的替代方案.
- 过器在没有调节pH值的情况下工作,将Cr[VI]转换为Cr[III].
- 在没有氧气的情况下,MoS2-棉花介质的处理能力与商业的离子交换树脂相当或超过.
更多相关视频
09:23Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability
Published on: June 21, 2015
10.2K
09:22Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
Published on: July 25, 2025
669
相关概念视频
01:26Redox Titration: Other Oxidizing and Reducing Agents
1.4K
Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
1.4K
01:17Precipitation and Co-precipitation
4.0K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
4.0K