A Predictive model for solution composition, neutralizer dosage, and sludge generation in the treatment of acid mine drainage from abandoned mines

Chiharu Tokoro, Ryu Koide, Daisuke Haraguchi, Shinsuke Murakami, Tsuyoshi Adachi, Shuji Owada, Takahiko Okura

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Acid Mine Drainage (AMD), high acid water containing heavy metals discharged from mines, has been recognized as major cause of mine pollution. In Japan, the government spends billions of yen every year to prevent pollution caused by AMD in about 80 abandoned mines. It is widely recognized that the treatment could continue for long decades or an even century. However, costs and environmental loads are uncertain during the treatment because a predictive model for the quality of AMD, the dosage of neutralizer, and the amount of sludge that is applicable for abandoned mines with limited data has not yet been established. In this study, a two-steps predictive model for solution composition and neutralization chemical requirements of AMD in future was constructed based on the geochemical modeling. Requisite input data of the model was the past historical water quality data from AMD monitoring, such as metal concentration and pH in the solution, instead of the sample rocks as other conventional prediction methods. In the first step, solution composition of AMD in the future was extrapolated from the available historical data using geochemical simulation considering the first order kinetics for the mineral dissolution. In the second step, neutralizer dosage and sludge generation in the future was predicted based on the geochemical simulation supposing the chemical equilibrium and oxidation state for all of elements in the solution. Based on case studies of two abandoned mines in Japan, solution composition, neutralizer dosage and sludge generation were estimated. The results of this study demonstrate the effectiveness of our model for the prediction of AMD quality and chemical requirements of neutralization treatment after mine closing. The model is useful for the estimation of the neutralizer dosage and the sludge volume in abandoned mines with limited data.

    Original languageEnglish
    Title of host publication26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings
    Pages5474-5485
    Number of pages12
    Publication statusPublished - 2012
    Event26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - New Delhi
    Duration: 2012 Sep 242012 Sep 28

    Other

    Other26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth
    CityNew Delhi
    Period12/9/2412/9/28

    Fingerprint

    Abandoned mines
    abandoned mine
    acid mine drainage
    Drainage
    sludge
    Acids
    Chemical analysis
    neutralization
    pollution
    acid water
    Pollution
    prediction
    dosage
    simulation
    dissolution
    Heavy Metals
    heavy metal
    Chemical elements
    water quality
    oxidation

    Keywords

    • Acid mine drainage
    • First order kinetics
    • Geochemical modeling
    • Predictive model
    • Water monitoring

    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Geotechnical Engineering and Engineering Geology

    Cite this

    Tokoro, C., Koide, R., Haraguchi, D., Murakami, S., Adachi, T., Owada, S., & Okura, T. (2012). A Predictive model for solution composition, neutralizer dosage, and sludge generation in the treatment of acid mine drainage from abandoned mines. In 26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings (pp. 5474-5485)

    A Predictive model for solution composition, neutralizer dosage, and sludge generation in the treatment of acid mine drainage from abandoned mines. / Tokoro, Chiharu; Koide, Ryu; Haraguchi, Daisuke; Murakami, Shinsuke; Adachi, Tsuyoshi; Owada, Shuji; Okura, Takahiko.

    26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings. 2012. p. 5474-5485.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Tokoro, C, Koide, R, Haraguchi, D, Murakami, S, Adachi, T, Owada, S & Okura, T 2012, A Predictive model for solution composition, neutralizer dosage, and sludge generation in the treatment of acid mine drainage from abandoned mines. in 26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings. pp. 5474-5485, 26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth, New Delhi, 12/9/24.
    Tokoro C, Koide R, Haraguchi D, Murakami S, Adachi T, Owada S et al. A Predictive model for solution composition, neutralizer dosage, and sludge generation in the treatment of acid mine drainage from abandoned mines. In 26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings. 2012. p. 5474-5485
    Tokoro, Chiharu ; Koide, Ryu ; Haraguchi, Daisuke ; Murakami, Shinsuke ; Adachi, Tsuyoshi ; Owada, Shuji ; Okura, Takahiko. / A Predictive model for solution composition, neutralizer dosage, and sludge generation in the treatment of acid mine drainage from abandoned mines. 26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings. 2012. pp. 5474-5485
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    AU - Tokoro, Chiharu

    AU - Koide, Ryu

    AU - Haraguchi, Daisuke

    AU - Murakami, Shinsuke

    AU - Adachi, Tsuyoshi

    AU - Owada, Shuji

    AU - Okura, Takahiko

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