Abstract
One of the major concerns faced by the iron and steel industry, other than the abundant emission of carbon dioxide into the atmosphere, is the huge quantity of slag that is generated during the manufacturing of iron and steel. A comprehensive understanding of the iron and steel slag properties has diverted them away from stockpiling or landfilling to useful engineering applications. The similarity of these slags to natural minerals used in geologic carbon dioxide sequestration has made them sustainable alternative for industrial-scale carbon capture and storage. Further, they possess properties that are conducive for remediation of soil and groundwater contaminated with heavy metals and other toxic chemicals. This paper reviews the iron and steel slag characteristics suitable for engineering applications, describes several engineering application examples, and discusses challenges and opportunities to develop practical applications using iron and steel slags. This paper also discusses the on-going research which explores the use of steel slag along with the biochar-amended soil to develop a biogeochemical landfill cover to sequester fugitive gas emissions such as CH4, CO2 and H2S from MSW landfills and attain zero-emissions landfill.
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Abbreviations
- AMD:
-
Acid mine drainage
- AVS:
-
Acid volatile sulfide
- AW:
-
Alkaline industrial wastes
- BOD:
-
Biochemical oxygen demand
- BF:
-
Blast furnace
- BOF:
-
Basic oxygen furnace
- CCS:
-
Carbon capture and storage
- C&D:
-
Construction and demolition
- DM:
-
Dredged material
- EAF:
-
Electric arc furnace
- ETS:
-
Emissions trade system
- GCS:
-
Geological carbon sequestration
- GDP:
-
Gross domestic product
- GHG:
-
Greenhouse gas
- GGBS:
-
Ground granulated blast furnace slag
- IPCC:
-
Intergovernmental panel on climate change
- LD:
-
Ladle slag
- LFG:
-
Landfill gas
- L/S:
-
Liquid to solid ratio
- MSW:
-
Municipal solid waste
- SEM:
-
Scanning electron microscopy
- SPLP:
-
Synthetic precipitation leaching procedure
- SSF:
-
Steel slag fines
- SSS:
-
Stainless steel slag
- TCE:
-
Trichloroethylene
- TCLP:
-
Toxicity characteristics leaching procedure
- TGA:
-
Thermogravimetric analysis
- XEDS:
-
X-ray energy dispersive spectrometer
- XRD:
-
X-ray diffraction
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Acknowledgements
This project is funded by the U.S. National Science Foundation (Grant CMMI # 1724773), which is gratefully acknowledged. The authors thank Girish Kumar, Iziquiel Cecchin, Dennis Grubb for their guidance and assistance during this study.
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Reddy, K.R., Gopakumar, A. & Chetri, J.K. Critical review of applications of iron and steel slags for carbon sequestration and environmental remediation. Rev Environ Sci Biotechnol 18, 127–152 (2019). https://doi.org/10.1007/s11157-018-09490-w
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DOI: https://doi.org/10.1007/s11157-018-09490-w