| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 226735 | Journal of Industrial and Engineering Chemistry | 2015 | 9 Pages |
•Prepared magnetic nano-adsorbent has good dispersity in the solution and can remove more than 90 % of mercury content very fast (less than 5 minutes).•The nano-adsorbents can be recovered efficiently and used again in new cycle.•They can preserve their removal ability in some oil contaminated industrial waste water samples.
Chitosan coated magnetic nanoparticles have been synthesized and developed as highly efficient nano-adsorbent for the removal of Hg2+ ions from industrial aqueous and oily samples. TEM, DLS, UV–vis, FTIR spectroscopy, VSM and zeta-potential techniques were applied for characterization of nanoparticles. The results confirmed formation of narrow dispersed nanoparticles with mean diameter about 10 nm. The effects of experimental conditions such as, pH, temperature, nano-adsorbent dosage and the concentration of chitosan on the removal ability were investigated. In order to regenerate of adsorbent, some eluents were used for desorption of mercury ions and the best results were achieved using EDTA and H2SO4.
Graphical abstractIn brief, route of synthesis of chitosan coated magnetic nanoparticles and then mercury removal using as-prepared nanoparticles showed in fig. This investigation shows the effective removal of mercury (II) ions from oily and industrial samples by Chitosan coated magnetic nanoparticles as an efficient adsorbent. The proposed method is fast, simple, cheap, effective and safe for treatment of mercury polluted samples. Effect of variation of pH, temperature, dosage of adsorbent, concentration of carboxymethylated chitosan investigated on the mercury removal efficiency. In order to the regeneration of adsorbent for further uses, some eluents (dilute mineral acids and organic acid or some chelating agents) were used for desorption of mercury ions from nano-adsorbent and then the best result achieved.Figure optionsDownload full-size imageDownload as PowerPoint slide
