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Microfluidic generation of Prussian blue-laden magnetic micro-adsorbents for cesium removal
- Source :
- Chemical Engineering Journal. 341:218-226
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Here, we designed and synthesized a recoverable multifunctional adsorbent using a microfluidic reaction system and evaluated the removal performance of the smart adsorbent toward radioactive cesium as a model sample. Prussian blue-laden magnetic micro-adsorbents (PB-MNPs-MAs) with uniform morphology and monodispersity were generated via two-step sequential procedures using a glass capillary microfluidic system, followed by chemical co-precipitation with a high production rate. The cesium removal efficacy of the PB-MNPs-MAs was analyzed based on Langmuir and Freundlich isotherms by controlling adsorption parameters such as adsorbent size, initial cesium concentration, and contact time. The adsorption isotherm of the PB-MNPs-MAs was better fitted to the Langmuir model with a maximum cesium adsorption capacity of 58.73 mg g−1, which was 40% higher than that of macro-adsorbents in a dynamic magnetic field. This result can be attributed to their large specific area, which increased the kinetic rate of cesium adsorption and achieved saturation within 20 min. Additionally, the PB-MNPs-MAs were recovered from wastewater within 5 s under a static magnetic field, indicating their great potential for magnetic actuation. We believe that our PB-MNPs-MAs can encapsulate nano-functional adsorbents and prevent actuation, making them promising for environmental remediation and especially for removal of radionuclides.
- Subjects :
- Prussian blue
Langmuir
Materials science
General Chemical Engineering
chemistry.chemical_element
Langmuir adsorption model
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Magnetostatics
01 natural sciences
Industrial and Manufacturing Engineering
0104 chemical sciences
chemistry.chemical_compound
symbols.namesake
Adsorption
chemistry
Chemical engineering
Caesium
symbols
Environmental Chemistry
Freundlich equation
0210 nano-technology
Saturation (magnetic)
Subjects
Details
- ISSN :
- 13858947
- Volume :
- 341
- Database :
- OpenAIRE
- Journal :
- Chemical Engineering Journal
- Accession number :
- edsair.doi...........9bbb874b06d2161b72833ab755328c32