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Re-Use of Silico-Manganese Slag

Author

Listed:
  • Daniela Laura Buruiana

    (Interdisciplinary Research Centre in the Field of Eco-Nano Technology and Advance Materials CC-ITI, Faculty of Engineering, “Dunarea de Jos” University of Galati, 47 Domneasca, 800008 Galati, Romania)

  • Cristian-Dragos Obreja

    (Department of Materials and Environmental Engineering, Faculty of Engineering, “Dunarea de Jos” University of Galati, 47 Domneasca, 800008 Galati, Romania)

  • Elena Emanuela Herbei

    (Interdisciplinary Research Centre in the Field of Eco-Nano Technology and Advance Materials CC-ITI, Faculty of Engineering, “Dunarea de Jos” University of Galati, 47 Domneasca, 800008 Galati, Romania)

  • Viorica Ghisman

    (Interdisciplinary Research Centre in the Field of Eco-Nano Technology and Advance Materials CC-ITI, Faculty of Engineering, “Dunarea de Jos” University of Galati, 47 Domneasca, 800008 Galati, Romania)

Abstract

The world’s rapidly growing demand for raw manganese has made it increasingly important to develop methods for the economic recovery of manganese from secondary sources. The current study aims to present possible ways for the recycling and reuse of silico-manganese slag landfilled in Tulcea, City on the Danube River close to the Danube Delta Biosphere Reserve in order to save the natural resources raw of manganese. In the last three decades, the ferroalloy production plant has over 2.6 million tons of slag. Slag dumping constitutes a significant source of air, water and soil pollution, which adversely affects the environment and human health. Mn present in the slag dump is an environmental pollutant with potentially toxic effects. The results obtained with a leaching method to recover manganese from slag shows two efficient ways to valorize manganese from solid fraction (54%) with size particles between 80 and 315 µm and/or reuse the leaching medium (56% Mn) with a slag size of <80 µm. The motivation of our research is the possibility to recover manganese from slag by saving natural resources of raw of manganese and the remaining fraction can be used as aggregate sources (construction and road rehabilitation by saving extract mineral aggregates and agriculture), in order to decommission the slag dump. The proposed research is in concordance with the sustainable use of natural resources for the achievement of sustainable development of the 2030 Agenda and Waste Management Legislation due of the huge ecological costs regarding non-conforming waste dumping. If we consider the cost-benefit analysis, the environmental future is more important the human health and the benefits on the quality of the population’s health and the environment which are not non-measurable in monetary value.

Suggested Citation

  • Daniela Laura Buruiana & Cristian-Dragos Obreja & Elena Emanuela Herbei & Viorica Ghisman, 2021. "Re-Use of Silico-Manganese Slag," Sustainability, MDPI, vol. 13(21), pages 1-9, October.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:21:p:11771-:d:664016
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    References listed on IDEAS

    as
    1. Huaiwei, Zhang & Xin, Hong, 2011. "An overview for the utilization of wastes from stainless steel industries," Resources, Conservation & Recycling, Elsevier, vol. 55(8), pages 745-754.
    2. Das, B. & Prakash, S. & Reddy, P.S.R. & Misra, V.N., 2007. "An overview of utilization of slag and sludge from steel industries," Resources, Conservation & Recycling, Elsevier, vol. 50(1), pages 40-57.
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