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Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light

Zhao, Qiuming
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1300118443

Abstract Details

2011, MS, University of Cincinnati, Engineering and Applied Science: Environmental Engineering.
With the advance of the sensitive modern analytical techniques such as ion chromatography(IC), perchlorate (ClO4 -) contamination in drinking water systems has been revealed as a widespread problem in United States, typical water contaminations are at 0.005-0.020 µg/L (5-20 ppb) levels. Man-made perchlorate is a major contribution to contamination in the environment due to the exceptional oxidation properties of perchlorate. Although various perchlorate treatment technologies have been shown to be effective, chemical destruction may be the optimal way to remove perchlorate from water systems. In this study, perchlorate reduction by zero valent iron filings enhanced by UV light and palladium was conducted. Up to 52% perchlorate reduction from the original 1 mg/L (1ppm) was achieved using iron filings alone in a batch study. However, using UV light (0.24mW/cm2, 12KW) with zero valent iron perchlorate reduction was enhanced to 83%. Palladium salt increased reduction very slightly, while UV light with palladium reduced perchlorate by 88%. Adsorption of perchlorate to the catalyst surface took place during the first 6 hours of the batch experiment under conditions of UV light and Palladium salt. In order to evaluate the effect of iron dosage, four different iron dosages, 0.25g/ml, 0.50g/ml, 0.75g/ml and 1.0g/ml, were used in the batch study. Among these, 1.0 g/ml of iron dosage showed the greatest capacity for perchlorate reduction. A mathematical correlation was established to explain the batch study reduction kinetics of perchlorate. A column flow experiment was conducted to evaluate the prediction of kinetic rate from the batch study. The reduction rate was correlated reasonably well by pseudo first order reaction kinetics under UV light.
George Sorial, PhD (Committee Chair)
E Sahle-Demissie, PhD (Committee Member)
Mingming Lu, PhD (Committee Member)
107 p.
Environmental Engineering
endocrine disruptor; ground water remediation; zero valent iron; oxidizer; perchlorate; UV light;

Recommended Citations

Citations

  • Zhao, Q. (2011). Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1300118443

    APA Style (7th edition)

  • Zhao, Qiuming. Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light. 2011. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1300118443.

    MLA Style (8th edition)

  • Zhao, Qiuming. "Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light." Master's thesis, University of Cincinnati, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1300118443

    Chicago Manual of Style (17th edition)

ucin1300118443
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© 2011, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.