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

Miller, Samuel A.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1430918808

Abstract Details

2015, Master of Science (MS), Ohio University, Geological Sciences (Arts and Sciences).
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 (Fe2+) from AMD. Fenton’s reagent forms from a mixture of hydrogen peroxide (H2O2) and Fe2+ available from AMD, creating an advanced oxidation process. Twenty-eight SR-HP forms were developed by dispersing sodium percarbonate (Na2CO3 1.5H2O2) salts in a polymeric matrix. The SR-HP forms released H2O2 in flowing water at a peak release rate of 0.05 – 52.1 mg min-1 during the initial hour and continued to release H2O2 at a lower, stable release rate (0.02 – 1.5 mg min-1) 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 Fe2+ from AMD within one minute. Ideal [Fe+2]/[H2O2] ratios for >80% Fe2+ removal clustered around 2, with decreasing Fe2+ removal as the ratio increases. A small-scale field test demonstrated the efficacy of SR-HP at oxidizing Fe2+. 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.
Eung Seok Lee (Advisor)
91 p.
Environmental Geology; Environmental Science; Geology; Hydrology
Acid Mine Drainage; Fentons Reagent; Slow-Release

Recommended Citations

Citations

  • Miller, S. A. (2015). Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1430918808

    APA Style (7th edition)

  • Miller, Samuel. Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide. 2015. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1430918808.

    MLA Style (8th edition)

  • Miller, Samuel. "Treating Metals in Acid Mine Drainage Using Slow-Release Hydrogen Peroxide." Master's thesis, Ohio University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1430918808

    Chicago Manual of Style (17th edition)

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This open access ETD is published by Ohio University and OhioLINK.