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Power Generation: Feedstock for High-Value Sulfate Minerals

Institute for Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland
ISTerre, University Grenoble Alpes & CNRS, 38000 Grenoble, France
Author to whom correspondence should be addressed.
Minerals 2020, 10(2), 188;
Received: 30 November 2019 / Revised: 9 February 2020 / Accepted: 16 February 2020 / Published: 19 February 2020
(This article belongs to the Special Issue Barite)
Coal-fired power facilities generate a polymetallic effluent (Flue Gas Desulfurization—FGD) rich in sulfate. FGD effluents may be considered an important secondary resource. This paper investigates the recovery of sulfate as barite (BaSO4), a mineral with high commercial value and a critical raw material. Using equimolar BaCl2, >99% desulfurization of an FGD effluent produced by a coal-fired power plant operating in central Poland was achieved, yielding up to 16.5 kg high purity barite m−3. The recovered barite was characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric (TGA), scanning electron microscopy analysis (SEM), surface properties (PZC), density, and chemical stability (TCLP), and was compared with a commercial reference material. Barite recovery also led to the reduction in concentration of Al (86%), Cu (52%), K (69%), Mo (62%), Se (40%), Sr (91%), and U (75%) initially present in the FGD effluent. TCLP results indicate the entrapment and the stabilization of ~70% Se and ~90% Al in the barite structure. Based on this dataset, an in-depth characterization of the recovered barite is presented, and the removal mechanism of the elements is discussed. The study also provides a preliminary cost benefit analysis of the process. To our best knowledge, this is the first work showing barite recovery and metal removal from FGD effluents using a one-step process. View Full-Text
Keywords: BaSO4; critical raw material (CRM); FGD; resource recovery; circular economy BaSO4; critical raw material (CRM); FGD; resource recovery; circular economy
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MDPI and ACS Style

Staicu, L.C.; Bajda, T.; Drewniak, L.; Charlet, L. Power Generation: Feedstock for High-Value Sulfate Minerals. Minerals 2020, 10, 188.

AMA Style

Staicu LC, Bajda T, Drewniak L, Charlet L. Power Generation: Feedstock for High-Value Sulfate Minerals. Minerals. 2020; 10(2):188.

Chicago/Turabian Style

Staicu, Lucian C., Tomasz Bajda, Lukasz Drewniak, and Laurent Charlet. 2020. "Power Generation: Feedstock for High-Value Sulfate Minerals" Minerals 10, no. 2: 188.

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