Trimellitic acid functionalized magnetite nanoparticles for the efficient removal of Pb(II) and Cr(VI) from wastewater streams
| Autor: | Muhammad Ilyas Sarwar, Tehreema Nawaz, Sonia Zulfiqar, Mudassir Iqbal |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Langmuir
Aqueous solution General Chemical Engineering Metal ions in aqueous solution Trimellitic acid Nanoparticle 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Metal chemistry.chemical_compound Adsorption 020401 chemical engineering chemistry visual_art visual_art.visual_art_medium Freundlich equation 0204 chemical engineering 0210 nano-technology Nuclear chemistry |
| Zdroj: | Korean Journal of Chemical Engineering. 36:860-868 |
| ISSN: | 1975-7220 0256-1115 |
| DOI: | 10.1007/s11814-019-0265-3 |
| Popis: | Silica-coated Fe3O4 nanoparticles were prepared and functionalized with trimellitic anhydride generating novel amide and two acid moieties on the surface of the nanoparticles. These nanoparticles were found to be ferrimagnetic with average particle size 50–60 nm as characterized by XRD, SEM, EDS, VSM and FTIR analyses. The functionalized nanoparticles were exploited as adsorbent for the removal of Pb(II) cations and Cr(VI) anions from their aqueous solutions and uptake of metal ions was monitored by atomic absorption spectroscopy (AAS). These nanoparticles were found to be more effective for the removal of Pb(II) cations due to the negatively charged surface groups relative to Cr(VI) anions. The adsorption data fitted well with Langmuir as well as Freundlich adsorption isotherms, showing a complex nature of adsorption phenomena, comprising electrostatic as well as chemical attraction between surface groups and metal ions. The metal bearing nanoparticles were easily separated from the solution by simply applying external magnetic field. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink