SiO2/Zn0.4Co0.6Fe2O4气凝:一种高效且可重复使用的超偏磁吸附剂,用于油性水的整治
Fagr A Shehata1, Amer S El-Kalliny1, Mohamed S Attia2
1Water Pollution Research Department, National Research Centre 33 El Buhouth St., Dokki 12622 Giza Egypt kalliny78@hotmail.com as.el-kalliny@nrc.sci.eg +201012431344.
RSC advances
|August 7, 2023
概括
制成的磁性气凝从二氧化和铁酸盐被开发用于石油的去除. 冷干燥产生了优异的油吸附和磁回收,为废水处理提供了可持续的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 纳米技术纳米技术
背景情况:
- 开发用于油水分离的高效吸附剂对于环境保护至关重要.
- 磁性材料在分离和回收过程中具有优势.
- 超疏水表面增强了油的吸附能力.
研究的目的:
- 为了合成和描述磁性SiO2/Zn0.4Co0.6Fe2O4气凝.
- 研究不同干燥方法 (环境压力干燥和冷干燥) 对材料性能和性能的影响.
- 评估这些气凝在废水中去除油的潜力.
主要方法:
- 磁性气凝的sol-gel合成方法.
- 用油酸对表面进行修改,以赋予疏水性.
- 使用技术来确定磁性特性和表面湿透性的特征.
- 吸附实验,以评估去除油的效率和能力.
- 对磁性回收和可重复使用性的评估.
主要成果:
- 超偏磁SiO2/Zn0.4Co0.6Fe2O4气凝已经成功制备.
- 与环境压力干燥的相比,冷干燥的气凝表现出更高的和磁化 (15.1 emu g-1) 和超水性 (接触角~140°).
- 在冷干燥的气凝中,吸附能力高达2gg-1,证明了有效的去除油.
- 材料显示成功的磁性回收和可重复使用性.
结论:
- 合成的磁性气凝,特别是通过冷干燥制备的气凝,在油水分离方面非常有效.
- 超性和磁性特性促进了高效的油吸附和易于回收.
- 这些材料为废水整治提供了一个有希望的,具有成本效益和环保的解决方案.
相关概念视频
01:09Colloidal precipitates
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
01:17Precipitation and Co-precipitation
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...
01:06Coagulation
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
01:17Ion Exchange
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...