Abstract
Mesoporous silica particles were modified with LIX-84 (2-hydroxy-5-nonylacetophenome oxime). LIX-84 was attached to the surface of silica via noncovalent forces. The effects of silica particle size, pore size, temperature, and pH on metal-ion-exchange properties were studied to characterize metal ion adsorption properties for chelating groups noncovalently bound to the surface of silica. The adsorbent had a capacity of 0.6 mmol of Cu2+/g of adsorbent at room temperature and a capacity of 1.1 mmol of Cu2+/g of adsorbent at 60 °C. Depending on the solution pH, the adsorbent had varying capacity for Cu2+, Ni2+, and Pb2+. The adsorbent was found to have good stability and gave high metal recovery when regenerated with 2 vol % nitric acid. An increased ion-exchange rate was achieved and was attributed to the use of larger pore size silica. The silica was found to contain from 5 to 7 wt % LIX-84.
Original language | English (US) |
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Pages (from-to) | 1253-1260 |
Number of pages | 8 |
Journal | Industrial and Engineering Chemistry Research |
Volume | 42 |
Issue number | 6 |
DOIs | |
State | Published - Mar 19 2003 |
Externally published | Yes |
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- Industrial and Manufacturing Engineering