Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide

Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide

Bibliographic Details
Main Author: Miller, Samuel A.
Language:English
Published: Ohio University / OhioLINK 2015
Subjects:
Environmental Science
Environmental Geology
Geology
Hydrology
Acid Mine Drainage
Fentons Reagent
Slow-Release
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1430918808
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou14309188082021-08-03T06:31:13Z Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide Miller, Samuel A. Environmental Science Environmental Geology Geology Hydrology Acid Mine Drainage Fentons Reagent Slow-Release Metal concentrations from acid mine drainage (AMD) pose a significant threat to aquatic systems worldwide as a result of past and current mining operations. This study tested the efficacy of using slow-release hydrogen peroxide (SR-HP) to oxidize and remove ferrous iron (Fe<sup>2+</sup>) from AMD. Fenton’s reagent forms from a mixture of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and Fe<sup>2+</sup> available from AMD, creating an advanced oxidation process. Twenty-eight SR-HP forms were developed by dispersing sodium percarbonate (Na<sub>2</sub>CO<sub>3</sub> 1.5H<sub>2</sub>O<sub>2</sub>) salts in a polymeric matrix. The SR-HP forms released H<sub>2</sub>O<sub>2</sub> in flowing water at a peak release rate of 0.05 – 52.1 mg min<sup>-1</sup> during the initial hour and continued to release H<sub>2</sub>O<sub>2</sub> at a lower, stable release rate (0.02 – 1.5 mg min<sup>-1</sup>) from a period of days to weeks depending on salt : binding agent mixing ratios. Oxidant : resin mixing ratios in addition to surface area were primary factors impacting the release profiles from the laboratory column leaching tests. Proof-of-concept iron removal tests indicate that SR-HP forms can efficiently remove Fe<sup>2+</sup> from AMD within one minute. Ideal [Fe<sup>+2</sup>]/[H<sub>2</sub>O<sub>2</sub>] ratios for >80% Fe<sup>2+</sup> removal clustered around 2, with decreasing Fe<sup>2+</sup> removal as the ratio increases. A small-scale field test demonstrated the efficacy of SR-HP at oxidizing Fe<sup>2+</sup>. Ferrous iron concentrations were reduced by 80% within the first hour of treatment. These results suggest feasibility of using SR-HP to treat oxidizable metals in AMD water. Further development of SR-HP forms with higher release rates, longer durations, stronger binder, and improved reproducibility could be possible. 2015-09-17 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1430918808 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1430918808 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.
collection NDLTD
language English
sources NDLTD
topic Environmental Science
Environmental Geology
Geology
Hydrology
Acid Mine Drainage
Fentons Reagent
Slow-Release
spellingShingle Environmental Science
Environmental Geology
Geology
Hydrology
Acid Mine Drainage
Fentons Reagent
Slow-Release
Miller, Samuel A.
Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide
author Miller, Samuel A.
author_facet Miller, Samuel A.
author_sort Miller, Samuel A.
title Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide
title_short Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide
title_full Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide
title_fullStr Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide
title_full_unstemmed Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide
title_sort treating metals in acid mine drainage using slow-release hydrogen peroxide
publisher Ohio University / OhioLINK
publishDate 2015
url http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1430918808
work_keys_str_mv AT millersamuela treatingmetalsinacidminedrainageusingslowreleasehydrogenperoxide
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