Abstract
A novel meso- and microporous tire-derived-carbon support with magnetic iron oxide nanoparticle adsorbents that selectively adsorbs Se(IV) ions from simulated contaminated water has been developed. In this work, the physicochemical characteristics of the composite adsorbent are characterized with respect to porosity and surface area, chemical composition, and microstructure morphology. The kinetics of this composite adsorbent in a fixed-bed setting has been determined. Several column runs were conducted and analyzed by inductively coupled plasma-optical emission spectroscopy (ICP-OES) to determine the concentration gradient vs time. These results were then fit to a pseudo-second order rate law to obtain equilibrium values. Combining calculated equilibrium values with effluent concentration data, enabled the application of the Adams-Bohart model to determine reaction constants and column coefficients. Column parameters obtained from different flow rates and fittings of the Adams-Bohart model were remarkably consistent. These findings enable the application of this sorbent to fixed-bed column systems and opens up further research into mixed pollutants tests with real wastewater and scaling of selenium pollutant removal.
| Original language | English |
|---|---|
| Article number | 1234 |
| Journal | Water (Switzerland) |
| Volume | 12 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 1 2020 |
Funding
Funding: The synthesis of carbon composite materials was sponsored by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division. This work was supported in part by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists (WDTS) under the Science Undergraduate Laboratory Internship (SULI) program. S.F.E. is grateful for a fellowship from the Bredesen Center. We would like to thank Dr. Rich Lee, RJ Lee Group for providing tire derived carbon. Acknowledgments: This manuscript has been authored by UT-Battelle LLC under Contract No. DE-AC05-00OR 22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).
| Funders | Funder number |
|---|---|
| Bredesen Center | |
| Office of Basic Energy Sciences | |
| UT-Battelle LLC | |
| U.S. Department of Energy | |
| Office of Science | |
| Workforce Development for Teachers and Scientists | |
| Division of Materials Sciences and Engineering |
Keywords
- Bench scale column extraction
- Carbon magnetic iron oxide particles
- Column kinetics
- Nanoadsorbents
- Selenium removal
- Wastewater purification
