Two-way valorization of blast furnace slag: synthesis of precipitated calcium carbonate and zeolitic heavy metal adsorbent
dc.contributor.author | Georgakopoulos, Evangelos | |
dc.contributor.author | Manovic, Vasilije | |
dc.date.accessioned | 2017-03-22T13:41:47Z | |
dc.date.available | 2017-03-22T13:41:47Z | |
dc.date.issued | 2017-02-21 | |
dc.description.abstract | The 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(external) (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_UK |
dc.identifier.citation | Georgakopoulos E, Santos RM, Chiang YW, Manovic V. (2017) Two-way valorization of blast furnace slag: synthesis of precipitated calcium carbonate and zeolitic heavy metal adsorbent. Journal of Visualized Experiments, Volume 120, Article number e55062 | en_UK |
dc.identifier.issn | 1940-087X | |
dc.identifier.uri | http://dx.doi.org/10.3791/55062 | |
dc.identifier.uri | http://dspace.lib.cranfield.ac.uk/handle/1826/11640 | |
dc.language.iso | en | en_UK |
dc.publisher | Journal of Visualized Experiments (JoVE) | en_UK |
dc.rights | Attribution 3.0 International | |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/ | |
dc.subject | Blast furnace slag | en_UK |
dc.subject | waste valorization | en_UK |
dc.subject | CO2 utilization | en_UK |
dc.subject | mineral carbonation | en_UK |
dc.subject | hydrothermal conversion | en_UK |
dc.subject | heavy metal adsorption | en_UK |
dc.subject | precipitated calcium carbonate | en_UK |
dc.subject | zeolite | en_UK |
dc.title | Two-way valorization of blast furnace slag: synthesis of precipitated calcium carbonate and zeolitic heavy metal adsorbent | en_UK |
dc.type | Article | en_UK |
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