Loading...
Please wait, while we are loading the content...
Similar Documents
Silica-coated magnetite nanoparticles core-shell spheres (Fe3O4@SiO2) for natural organic matter removal
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pasandideh, Elahe Karimi Kakavandi, Babak Nasseri, Simin Mahvi, Amir Hossein Nabizadeh, Ramin Esrafili, Ali Kalantary, Roshanak Rezaei |
| Copyright Year | 2016 |
| Abstract | BACKGROUND In this work, the magnetite (Fe3O4) nanoparticles (MNPs) and silica-coated magnetite nanoparticles (SMNPs) were synthesized as adsorbents for removing humic acid (HA) from water resources. METHODS The adsorption processes were performed in batch experiments with which the influence of pH, reaction time, adsorbent dosage, initial concentrations of HA and temperature were investigated. Specific techniques were applied to characterize the features of both adsorbents (i. e. TECHNIQUES) (SEM, XRD, TEM, BET, EDX and VSM). RESULTS The maximum saturation magnetization for SMNPs was 30.2 emu/g, which made its separation from the solution by a magnetic field to be easier and faster. The HA adsorption process onto the both adsorbents were best described by the Freundlich isotherm and pseudo-second-order kinetic models. Highest adsorption efficiency of HA by MNPs an d SMNPs occurred at acidic conditions (pH ≈ 3). The mechanisms of adsorption process involved with a physisorption process such as (i. e. hydrogen bonding and electrostatic interaction). The predicted maximum monolayer adsorption capacities obtained by Langmuir isotherm model for MNPs and SMNPs were 96.15 and 196.07 mg/g, respectively. CONCLUSION Higher amount of HA adsorption onto the surfaces of SMNPs than MNPs surfaces was observed, reflecting that silica impregnated on MNPs enhances the efficiency of the adsorbent in removing HA. |
| Starting Page | 1 |
| Ending Page | 6 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://jehse.biomedcentral.com/track/pdf/10.1186/s40201-016-0262-y?site=jehse.biomedcentral.com |
| PubMed reference number | 5123275 |
| Volume Number | 14 |
| Journal | Journal of environmental health science & engineering |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Adsorption Gram per Kilogram Humic Acids Hydrogen Bonding Kinetics Magnetic Resonance Imaging Magnetite Nanoparticles Metal Nanoparticles Pseudo brand of pseudoephedrine Pyschological Bonding Silicon Dioxide Transmission Electron Microscopy |
| Content Type | Text |
| Resource Type | Article |
