Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

dc.contributor.authorGeorgakopoulos, Evangelos
dc.contributor.authorSantos, Rafael M
dc.contributor.authorChiang, Yi Wai
dc.contributor.authorManovic, Vasilije
dc.date.accessioned2018-05-02T13:53:49Z
dc.date.available2018-05-02T13:53:49Z
dc.date.issued2017-02-21
dc.degree.departmentSchool of Engineeringen
dc.description.abstractThe aim of this work is to present a zero-waste process for storing CO2 in a stable and benign mineral form while producing zeolitic minerals with sufficient heavy metal adsorption capacity. To this end, blast furnace slag, a residue from iron-making, is utilized as the starting material. Calcium is selectively extracted from the slag by leaching with acetic acid (2 M CH3COOH) as the extraction agent. The filtered leachate is subsequently physico-chemically purified and then carbonated to form precipitated calcium carbonate (PCC) of high purity (<2 wt% non-calcium impurities, according to ICP-MS analysis). Sodium hydroxide is added to neutralize the regenerated acetate. The morphological properties of the resulting calcitic PCC are tuned for its potential application as a filler in papermaking. In parallel, the residual solids from the extraction stage are subjected to hydrothermal conversion in a caustic solution (2 M NaOH) that leads to the predominant formation of a particular zeolitic mineral phase (detected by XRD), namely analcime (NaAlSi2O6∙H2O). Based on its ability to adsorb Ni2+, as reported from batch adsorption experiments and ICP-OES analysis, this product can potentially be used in wastewater treatment or for environmental remediation applications.en_US
dc.identifier.urihttp://dx.doi.org/10.3791/55062
dc.identifier.urihttp://hdl.handle.net/10214/12952
dc.language.isoenen_US
dc.publisherJournal of Visualized Experimentsen_US
dc.rightsThe published article's license is described as a Creative Commons Attribution 3.0 (CC-BY 3.0) license. The published video's license is described as a Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 (CC-BY-ND-NC 3.0) license.*
dc.subjectBlast furnace slagen_US
dc.subjectwaste valorizationen_US
dc.subjectCO2 utilizationen_US
dc.subjectmineral carbonationen_US
dc.subjecthydrothermal conversionen_US
dc.subjectheavy metal adsorptionen_US
dc.subjectprecipitated calcium carbonateen_US
dc.subjectzeoliteen_US
dc.titleTwo-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbenten_US
dc.typeArticleen
dcterms.relationGeorgakopoulos, E., Santos, R.M., Chiang, Y.W., Manovic, V. (2017). Two-way valorization of blast furnace slag: synthesis of precipitated calcium carbonate and zeolitic heavy metal adsorbent. Journal of Visualized Experiments, 120, e55062.

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