Abstract
A cost-effective, easy-to-implement, and sustainable approach is needed to mitigate the production of alkaline leachate from steel slags that are reused or disposed in the environment. To address this issue, a humidification treatment process, which is operated by wetting a stack of steel slag using aqueous reagents and letting atmospheric CO2 to be passively diffused into the slag pores to induce slag carbonation reaction, was previously developed. In this study, we demonstrate that the leachate of raw steel slag can be recycled and used as a humidification reagent to substantially enhance the treatment efficiency as well as to enable operating the process with neither synthetic chemical consumption nor wastewater discharge. In a 24-h study, a 0.61-unit reduction in slag pH is achieved using a raw slag leachate as a reagent, which is substantially greater than a 0.28-unit reduction using deionized water. The net amount of CaCO3 produced during an extended humidification duration of 4 weeks is increased by 2.7-fold when the leachate is used instead of deionized water. A series of systematically designed experiments demonstrates that the pH (11.0) and ionic strength (0.0048) are the two major characteristics of the raw slag leachate that contribute to the enhanced efficiency of humidification treatment. With further demonstration at larger scales in follow-up studies, the novel humidification process that utilizes the leachate generated on-site as a reagent is expected to be a feasible alternative for alkali waste treatment prior to its reuse or disposal.
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References
Baciocchi R, Costa G, Di Bartolomeo E, Polettini A, Pomi R (2010) Carbonation of stainless steel slag as a process for CO 2 storage and slag valorization. Waste Biomass Valoriz 1:467–477
Baciocchi R, Costa G, Di Gianfilippo M, Polettini A, Pomi R, Stramazzo A (2015) Thin-film versus slurry-phase carbonation of steel slag: CO2 uptake and effects on mineralogy. J Hazard Mater 283:302–313
Barca C, Gerente C, Meyer D, Cliazarenc F, Andres Y (2012) Phosphate removal from synthetic and real wastewater using steel slags produced in Europe. Water Res 46:2376–2384
Chang E-E, Chen C-H, Chen Y-H, Pan S-Y, Chiang P-C (2011) Performance evaluation for carbonation of steel-making slags in a slurry reactor. J Hazard Mater 186:558–564
Chen B, Yoon S, Zhang Y, Han L, Choi Y (2019) Reduction of steel slag leachate pH via humidification using water and aqueous reagents. Sci Total Environ 671:598–607
Chimenos J, Fernandez A, Nadal R, Espiell F (2000) Short-term natural weathering of MSWI bottom ash. J Hazard Mater 79:287–299
Chu HW(2007) CO2 sequestration by carbonation of alkaline solid waste, Master Thesis, Graduate Institute of Environmental Engineering, National Taiwan University
Currie JA (1961) Gaseous diffusion in porous media. Part 3 – wet granular materials. Br J Appl Phys 12:275–281
Dananjayan RRT, Kandasamy P, Andimuthu R (2016) Direct mineral carbonation of coal fly ash for CO2 sequestration. J Clean Prod 112:4173–4182
De Windt L, Chaurand P, Rose J (2011) Kinetics of steel slag leaching: batch tests and modeling. Waste Manag 31:225–235
Dye R, Dallavalle J (1958) Diffusion of gases in porous media. Ind Eng Chem 50(8):1195–1200
El-Naas MH, El Gamal M, Hameedi S, Mohamed A-MO (2015) CO2 sequestration using accelerated gas-solid carbonation of pre-treated EAF steel-making bag house dust. J Environ Manag 156:218–224
Eloneva S, Teir S, Salminen J, Fogelholm C-J, Zevenhoven R (2008) Fixation of CO2 by carbonating calcium derived from blast furnace slag. Energy 33:1461–1467
Gomes HI, Mayes WM, Rogerson M, Stewart DI, Burke IT (2016) Alkaline residues and the environment: a review of impacts, management practices and opportunities. J Clean Prod 112:3571–3582
Gomes HI, Mayes WM, Baxter HA, Jarvis AP, Burke IT, Stewart DI, Rogerson M (2018) Options for managing alkaline steel slag leachate: a life cycle assessment. J Clean Prod 202:401–412
Gomes HI, Mayes WM, Whitby P, Rogerson M (2019) Constructed wetlands for steel slag leachate management: partitioning of arsenic, chromium, and vanadium in waters, sediments, and plants. J Environ Manag 243:30–38
Hobson AJ, Stewart DI, Bray AW, Mortimer RJ, Mayes WM, Riley AL, Rogerson M, Burke IT (2018) Behaviour and fate of vanadium during the aerobic neutralisation of hyperalkaline slag leachate. Sci Total Environ 643:1191–1199
Huijgen WJ, Witkamp G-J, Comans RN (2005) Mineral CO2 sequestration by steel slag carbonation. Environ Sci Technol 39:9676–9682
ISO (International Organization for Standardization) (2007) Soil quality - leaching procedures for subsequent chemical and ecotoxicological testing of soil and soil materials - part 3: up-flow percolation test; ISO/TS21268–3
Kodama S, Nishimoto T, Yamamoto N, Yogo K, Yamada K (2008) Development of a new pH-swing CO2 mineralization process with a recyclable reaction solution. Energy 33:776–784
Li KG (2006) China flood and drought disaster. China Flood Drought Manag 2:14–16 (in Chinese)
Li X, Bertos MF, Hills CD, Carey PJ, Simon S (2007) Accelerated carbonation of municipal solid waste incineration fly ashes. Waste Manag 27:1200–1206
Li Z, Zhao S, Zhao X, He T (2012) Leaching characteristics of steel slag components and their application in cementitious property prediction. J Hazard Mater 199:448–452
Librandi P, Costa G, Stendardo S, Baciocchi R (2019) Carbonation of BOF slag in a rotary kiln reactor in view of the scale-up of the wet route process. Environ Prog Sustain Energy 38(3): e13140
Mayes W, Aumonier J, Jarvis A (2009) Preliminary evaluation of a constructed wetland for treating extremely alkaline (pH 12) steel slag drainage. Water Sci Technol 59:2253–2263
Mayes WM, Riley AL, Gomes HI, Brabham P, Hamlyn J, Pullin H, Renforth P (2018) Atmospheric CO2 sequestration in iron and steel slag: Consett, County Durham, United Kingdom. Environ Sci Technol 52:7892–7900
Mignardi S, De Vito C, Ferrini V, Martin R (2011) The efficiency of CO2 sequestration via carbonate mineralization with simulated wastewaters of high salinity. J Hazard Mater 191:49–55
Navarro C, Díaz M, Villa-García MA (2010) Physico-chemical characterization of steel slag. Study of its behavior under simulated environmental conditions. Environ Sci Technol 44:5383–5388
Pan S-Y, Adhikari R, Chen Y-H, Li P, Chiang P-C (2016) Integrated and innovative steel slag utilization for iron reclamation, green material production and CO2 fixation via accelerated carbonation. J Clean Prod 137:617–631
Randall D, Tsui T (2002) Ammonia toxicity in fish. Mar Pollut Bull 45:17–23
Sanna A, Uibu M, Caramanna G, Kuusik R, Maroto-Valer M (2014) A review of mineral carbonation technologies to sequester CO2. Chem Soc Rev 43:8049–8080
Santos RM, Van Bouwel J, Vandevelde E, Mertens G, Elsen J, Van Gerven T (2013) Accelerated mineral carbonation of stainless steel slags for CO2 storage and waste valorization: effect of process parameters on geochemical properties. Int J Greenhouse Gas Control 17:32–45
Shi CJ (2004) Steel slag - its production, processing, characteristics, and cementitious properties. J Mater Civ Eng 16:230–236
Tchobanoglous G, Schroeder ED (1987) Water quality: characteristics, modeling, Modification., Print
Ukwattage NL, Ranjith P, Yellishetty M, Bui HH, Xu T (2015) A laboratory-scale study of the aqueous mineral carbonation of coal fly ash for CO2 sequestration. J Clean Prod 103:665–674
Valdez-Aguilar LA, Grieve CM, Poss J (2009) Salinity and alkaline pH in irrigation water affect marigold plants: I. Growth and shoot dry weight partitioning. Hort Sci 44:1719–1725
Wang L, Chen L, Tsang DC, Li J-S, Yeung TL, Ding S, Poon CS (2018) Green remediation of contaminated sediment by stabilization/solidification with industrial by-products and CO 2 utilization. Sci Total Environ 631:1321–1327
You K-s, Lee S-H, Hwang S-H, Kim H-s, Ahn J-W (2011) CO2 sequestration via a surface-modified ground granulated blast furnace slag using NaOH solution. Mater Trans 52:1972–1976
Zahangir MM, Haque F, Mostakim GM, Islam MS (2015) Secondary stress responses of zebrafish to different pH: evaluation in a seasonal manner. Aquacult Rep 2:91–96
Zhao Y, Yuan J, Zhang J, Xie L, Ji Z, Su M, Chen J (2013) A different approach for seawater decalcification pretreatment using carbon dioxide as precipitator. Desalination 322:151–158
Acknowledgments
The authors also would like to thank a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
Funding
This project was supported by the Korea Ministry of Environment as “The SEM projects”; grant no. 2018002450002. This project was also supported by the National Natural Science Foundation of China (Grant No. 51979079).
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Chen, B., Han, L., Yoon, S. et al. Applying steel slag leachate as a reagent substantially enhances pH reduction efficiency for humidification treatment. Environ Sci Pollut Res 27, 18911–18923 (2020). https://doi.org/10.1007/s11356-020-08429-5
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DOI: https://doi.org/10.1007/s11356-020-08429-5