Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light
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| Language: | English |
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University of Cincinnati / OhioLINK
2011
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=ucin1300118443 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-ucin13001184432021-08-03T06:14:34Z Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light Zhao, Qiuming Environmental Engineering endocrine disruptor ground water remediation zero valent iron oxidizer perchlorate UV light 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 widespreadproblem 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 theexceptional oxidation properties of perchlorate. Although various perchlorate treatmenttechnologies have been shown to be effective, chemical destruction may be the optimal way toremove perchlorate from water systems. In this study, perchlorate reduction by zero valent ironfilings enhanced by UV light and palladium was conducted. Up to 52% perchlorate reduction fromthe original 1 mg/L (1ppm) was achieved using iron filings alone in a batch study. However, usingUV 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 reducedperchlorate by 88%. Adsorption of perchlorate to the catalyst surface took place during the first 6hours of the batch experiment under conditions of UV light and Palladium salt. In order to evaluatethe 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 capacityfor perchlorate reduction. A mathematical correlation was established to explain the batch studyreduction kinetics of perchlorate. A column flow experiment was conducted to evaluate theprediction of kinetic rate from the batch study. The reduction rate was correlated reasonably wellby pseudo first order reaction kinetics under UV light. 2011-04-20 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1300118443 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1300118443 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Environmental Engineering endocrine disruptor ground water remediation zero valent iron oxidizer perchlorate UV light |
| spellingShingle |
Environmental Engineering endocrine disruptor ground water remediation zero valent iron oxidizer perchlorate UV light Zhao, Qiuming Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light |
| author |
Zhao, Qiuming |
| author_facet |
Zhao, Qiuming |
| author_sort |
Zhao, Qiuming |
| title |
Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light |
| title_short |
Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light |
| title_full |
Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light |
| title_fullStr |
Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light |
| title_full_unstemmed |
Reduction of Perchlorate from Contaminated Waters Using Zero Valent Iron and Palladium under UV Light |
| title_sort |
reduction of perchlorate from contaminated waters using zero valent iron and palladium under uv light |
| publisher |
University of Cincinnati / OhioLINK |
| publishDate |
2011 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1300118443 |
| work_keys_str_mv |
AT zhaoqiuming reductionofperchloratefromcontaminatedwatersusingzerovalentironandpalladiumunderuvlight |
| _version_ |
1719433332423393280 |