Spatial variation of AMD related CO₂ emissions on reclaimed mine spoil

Author

Moagabo Mathiba

Abstract

"Carbon dioxide (CO₂) from acid mine drainage (AMD)-carbonate neutralization reactions in reclaimed mine spoils, can intermittently invade homes and structures constructed on or adjacent to these spoils in hazardous and even lethal concentrations (>15%) and rendering them uninhabitable. This phenomenon is beginning to be recognized as an emerging environmental, safety and health threat with potential environmental and financial liability for mine operators, developers and owners.

Like in natural soils, soil temperature and moisture, and possibly elevation are likely to influence CO₂ emissions from reclaimed mine spoils. However, mine spoil soils are heterogeneous and have significant convective transport due to exothermic AMD reactions. Therefore, assumptions made for natural soils may not hold.

The aim of this study was to foster further understanding of the processes controlling the efflux of CO₂ from reclaimed mine spoils and evaluate the effectiveness of accumulation chamber (AC) flux measurement in identifying and delineating this hazard. AC measurements, isotope ratio mass spectroscopy, and statistical techniques were applied to three reclaimed mine sites in the United States of America. Among the study findings are that: (i) there is correlation between CO₂ flux and elevation, soil temperature and moisture; (ii) CO₂ fluxes are not always random but spatially autocorrelated; (iii) AMD-derived CO₂ emissions are normally too low to successfully be used to delineate hazards. This pioneering effort also makes recommendations for future work that could make AC flux measurement more effective for this emerging hazard"--Abstract, page iii.

Advisor(s)

Awuah-Offei, Kwame, 1975-

Committee Member(s)

Frimpong, Samuel
Galecki, Greg
Ge, Mao Chen
Cawlfield, Jeffrey D.

Department(s)

Mining Engineering

Degree Name

Ph. D. in Mining Engineering

Sponsor(s)

National Science Foundation (U.S.)
University of Botswana

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2013

Pagination

xxi, 210 pages

Note about bibliography

Includes bibliographical references (pages 199-209).

Geographic Coverage

Pennsylvania
Indiana
Missouri

Rights

© 2013 Moagabo Justice Kedikilwe Mathiba, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Mine soils -- Environmental aspectsCarbon dioxide mitigationAbandoned mined lands reclamation -- PennsylvaniaAbandoned mined lands reclamation -- IndianaAbandoned mined lands reclamation -- MissouriAcid mine drainage -- Environmental aspects

Thesis Number

T 10340

Print OCLC #

860982768

Electronic OCLC #

908855966

Recommended Citation

Mathiba, Moagabo, "Spatial variation of AMD related CO₂ emissions on reclaimed mine spoil" (2013). Doctoral Dissertations. 77.
https://scholarsmine.mst.edu/doctoral_dissertations/77