The effects of cement on some physical and chemical behavior for surface paste disposal method

Serkan Tuylu; Atac Bascetin; Deniz Adiguzel

doi:10.1016/j.jenvman.2018.10.007

The effects of cement on some physical and chemical behavior for surface paste disposal method

Serkan Tuylu^*, Atac Bascetin, Deniz Adiguzel

^*Corresponding author for this work

Istanbul University

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Environmental impacts resulting from conventional tailings disposal such as tailings dam accidents are a common problem for base metal mines around the world. In this context, laboratory-scale studies have been carried out on the Surface Paste Disposal (SPD) method, which is one of the alternative surface storage methods. In this study, three different SPD designs were tested; and volumetric water content, oxygen consumption, and matric suction sensors in first, fifth and 10th paste layers plus pH- electric conductivity (EC) values were all measured. Specifically, it was determined that the amount of oxygen in the environment required for the oxidation of sulfur minerals is reduced in the cemented layers in Design 3. In addition, the cement additive keeps the pH values of the seepage in an alkaline environment (over 7) so that it minimizes the risks of Acid Mine Drainage (AMD) and heavy metals mobilization at low pH values. Also, the EC values started a downward trend and ion dissolution decreased in designs with cemented layers. As a result, it was understood from the sensor measurements that the cemented layers act like a barrier.

Original language	English
Pages (from-to)	33-40
Number of pages	8
Journal	Journal of Environmental Management
Volume	231
DOIs	https://doi.org/10.1016/j.jenvman.2018.10.007
Publication status	Published - 1 Feb 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier Ltd

Funding

This work was supported by the Scientific and Technological Research Council of Turkey (Project Numbers: 116M721 ) and also by the Scientific Research Projects Coordination Unit of Istanbul University (Project Nos: 19062 , 40376 , 27845 , 21527 , 20817 ). The authors are grateful to the Executive Secretariat of Scientific Research Projects of Istanbul University.

Funders	Funder number
Istanbul Üniversitesi	40376, 20817, 19062, 21527, 27845
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu	116M721

Keywords

AMD
Heavy metal mobilization
Surface paste disposal method
Tailings

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10.1016/j.jenvman.2018.10.007

Cite this

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title = "The effects of cement on some physical and chemical behavior for surface paste disposal method",

abstract = "Environmental impacts resulting from conventional tailings disposal such as tailings dam accidents are a common problem for base metal mines around the world. In this context, laboratory-scale studies have been carried out on the Surface Paste Disposal (SPD) method, which is one of the alternative surface storage methods. In this study, three different SPD designs were tested; and volumetric water content, oxygen consumption, and matric suction sensors in first, fifth and 10th paste layers plus pH- electric conductivity (EC) values were all measured. Specifically, it was determined that the amount of oxygen in the environment required for the oxidation of sulfur minerals is reduced in the cemented layers in Design 3. In addition, the cement additive keeps the pH values of the seepage in an alkaline environment (over 7) so that it minimizes the risks of Acid Mine Drainage (AMD) and heavy metals mobilization at low pH values. Also, the EC values started a downward trend and ion dissolution decreased in designs with cemented layers. As a result, it was understood from the sensor measurements that the cemented layers act like a barrier.",

keywords = "AMD, Heavy metal mobilization, Surface paste disposal method, Tailings",

author = "Serkan Tuylu and Atac Bascetin and Deniz Adiguzel",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

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doi = "10.1016/j.jenvman.2018.10.007",

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AU - Bascetin, Atac

AU - Adiguzel, Deniz

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Y1 - 2019/2/1

N2 - Environmental impacts resulting from conventional tailings disposal such as tailings dam accidents are a common problem for base metal mines around the world. In this context, laboratory-scale studies have been carried out on the Surface Paste Disposal (SPD) method, which is one of the alternative surface storage methods. In this study, three different SPD designs were tested; and volumetric water content, oxygen consumption, and matric suction sensors in first, fifth and 10th paste layers plus pH- electric conductivity (EC) values were all measured. Specifically, it was determined that the amount of oxygen in the environment required for the oxidation of sulfur minerals is reduced in the cemented layers in Design 3. In addition, the cement additive keeps the pH values of the seepage in an alkaline environment (over 7) so that it minimizes the risks of Acid Mine Drainage (AMD) and heavy metals mobilization at low pH values. Also, the EC values started a downward trend and ion dissolution decreased in designs with cemented layers. As a result, it was understood from the sensor measurements that the cemented layers act like a barrier.

AB - Environmental impacts resulting from conventional tailings disposal such as tailings dam accidents are a common problem for base metal mines around the world. In this context, laboratory-scale studies have been carried out on the Surface Paste Disposal (SPD) method, which is one of the alternative surface storage methods. In this study, three different SPD designs were tested; and volumetric water content, oxygen consumption, and matric suction sensors in first, fifth and 10th paste layers plus pH- electric conductivity (EC) values were all measured. Specifically, it was determined that the amount of oxygen in the environment required for the oxidation of sulfur minerals is reduced in the cemented layers in Design 3. In addition, the cement additive keeps the pH values of the seepage in an alkaline environment (over 7) so that it minimizes the risks of Acid Mine Drainage (AMD) and heavy metals mobilization at low pH values. Also, the EC values started a downward trend and ion dissolution decreased in designs with cemented layers. As a result, it was understood from the sensor measurements that the cemented layers act like a barrier.

KW - AMD

KW - Heavy metal mobilization

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The effects of cement on some physical and chemical behavior for surface paste disposal method

Abstract

Bibliographical note

Funding

Keywords

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