Abstract
The removal of chromium from aqueous solution by an ion exchange resin is described. Ion exchange resins 1200H, 1500H and IRN97H show a remarkable increase in sorption capacity for chromium, compared to other adsorbents. The adsorption process, which is pH dependent show maximum removal of chromium in the pH range 2-6 for an initial chromium concentration of 10mg/l. The metal ion adsorption obeyed linear, Langmuir and Freundlich isotherms. The adsorption of chromium on these cation exchange resins follows first-order reversible kinetics and pseudo-first-order kinetics. The intraparticle diffusion of chromium on ion exchange resins represents the rate-limiting step. The uptake of chromium by the ion exchange resins was reversible and thus have good potential for the removal/recovery of chromium from aqueous solutions. We conclude that such ion exchange resins can be used for the efficient removal of chromium from water and wastewater.
| Original language | English |
|---|---|
| Pages (from-to) | 257-275 |
| Number of pages | 19 |
| Journal | Journal of Hazardous Materials |
| Volume | 102 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - Aug 29 2003 |
| Externally published | Yes |
Keywords
- Adsorption dynamics
- Adsorption isotherms
- Adsorption kinetics
- Chromium
- Electronic process wastewater
- Intraparticle diffusion
- Ion exchange resin
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
- Health, Toxicology and Mutagenesis