ENVR 15 |
| Vrishali Subramanian, Gopinath Nallani, Willam F. Jaynes, Angella B. Gentles, Gopal Coimbatore, and S. S. Ramkumar. |
| Inorganic arsenic (iAs) is a classified human carcinogen. Contamination of drinking water sources by iAs exists in two forms: trivalent and pentavalent. Among the various methods available, arsenic removal by iron oxides has proven to be very successful. In the present study, batch experiments were conducted to evaluate the arsenic removal efficiency by some commonly available iron oxides including maghemite nanoparticles. Fixed concentrations of As (V) and As (III) were prepared in Milli-Q water and graphite furnace atomic absorption spectrometry (GFAA) was used to cross-check the levels. A fixed amount of the iron oxide adsorbent was added to the solutions and subjected to uniform shaking overnight. Residual arsenic content in each of the five replicates of the treated solutions was measured by GFAA. The percent removal of each arsenic species was calculated. A comparison was made between the efficiency of each adsorbent to remove the trivalent and pentavalent arsenic.
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Occurrence, Chemistry, Toxicity and Remediation of Arsenic
8:00 AM-11:00 AM, Sunday, 26 March 2006 Georgia World Congress Center -- B218, Oral
Division of Environmental Chemistry |