Mercury removal from synthetic solutions using poly(2-hydroxyethylmethacrylate) gel beads modified with poly(ethyleneimine)
✍ Scribed by Adil Denizli; Serap Senel; Güleren Alsancak; Nalan Tüzmen; Ridvan Say
- Book ID
- 104425228
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 338 KB
- Volume
- 55
- Category
- Article
- ISSN
- 1381-5148
No coin nor oath required. For personal study only.
✦ Synopsis
In this study, the Hg adsorption-desorption properties of poly(ethyleneimine) (PEI)-attached poly(2-hydroxyethylmethacrylate) (PHEMA) beads were investigated. Spherical PHEMA beads with an average size of 150-200 mm were obtained by suspension polymerization of 2-hydroxyethylmethacrylate conducted in an aqueous dispersion medium. Owing 2 to the reasonably rough character of the bead surface, PHEMA beads had a specific surface area of 14.8 m / g. PEI chains could be covalently attached onto the PHEMA beads with equilibrium binding capacities up to 50 mg PEI / g beads.
21
PEI-attached PHEMA beads were utilized as adsorbent in the adsorption-desorption of Hg ions from synthetic solutions. The adsorption process was fast; 90% of adsorption occurred within 45 min and equilibrium was reached at around 1 h. The 21 maximum Hg adsorption capacity obtained was 1.67 mmol / g at a pH of about pH 5.0. Adsorption behavior can be described at least approximately by the Langmuir equation. The metal-chelating beads can be easily regenerated by 0.1 M HNO with higher effectiveness. Adsorption of heavy metal ions from artificial wastewater was also studied. The adsorption 3 21 21 21 capacities were 1.32 mmol / g for Hg , 0.34 mmol / g for Ni and 0.42 mmol / g for Cu .