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dc.contributor.authorRigopoulos, I.en
dc.contributor.authorHarrison, A. L.en
dc.contributor.authorDelimitis, A.en
dc.contributor.authorIoannou, I.en
dc.contributor.authorEfstathiou, A. M.en
dc.contributor.authorKyratsi, Theodoraen
dc.contributor.authorOelkers, E. H.en
dc.creatorRigopoulos, I.en
dc.creatorHarrison, A. L.en
dc.creatorDelimitis, A.en
dc.creatorIoannou, I.en
dc.creatorEfstathiou, A. M.en
dc.creatorKyratsi, Theodoraen
dc.creatorOelkers, E. H.en
dc.description.abstractEnhanced weathering of mafic and ultramafic rocks has been suggested as a carbon sequestration strategy for the mitigation of climate change. This study was designed to assess the potential drawdown of CO2 directly from the atmosphere by the enhanced weathering of peridotites and basalts in seawater. Pulverized, and ball milled dunite, harzburgite and olivine basalt were reacted in artificial seawater in batch reactor systems open to the atmosphere for two months. The results demonstrate that the ball-milled dunite and harzburgite changed dramatically the chemical composition of the seawater within a few hours, inducing CO2 drawdown directly from the atmosphere and ultimately the precipitation of aragonite. In contrast, pulverized but unmilled rocks, and the ball-milled basalt, did not yield any significant changes in seawater composition during the two-month experiments. As much as 10 wt percent aragonite was precipitated during the experiment containing the finest-grained dunite. These results demonstrate that ball milling can substantially enhance the weathering rate of peridotites in marine environments, promoting the permanent storage of CO2 as environmentally benign carbonate minerals through enhanced weathering. The precipitation of Mg-silicate clay minerals, however, could reduce the efficiency of this carbon sequestration approach over longer timescales. © 2017 Elsevier Ltden
dc.sourceApplied Geochemistryen
dc.subjectCarbon dioxideen
dc.subjectBall millingen
dc.subjectChemical compositionsen
dc.subjectCarbon captureen
dc.subjectCarbon capture and storage (CCS)en
dc.subjectCarbon capture and storages (CCS)en
dc.subjectClimate changeen
dc.subjectMineral carbonationen
dc.subjectSilicate mineralsen
dc.subjectBatch reactor systemsen
dc.subjectBatch reactorsen
dc.subjectCarbonate mineralsen
dc.subjectClay mineralsen
dc.subjectEnhanced weatheringen
dc.subjectEnvironmentally benignen
dc.subjectSeawater compositionsen
dc.subjectSilicate clay mineralsen
dc.titleCarbon sequestration via enhanced weathering of peridotites and basalts in seawateren
dc.description.endingpage207Πολυτεχνική Σχολή / Faculty of EngineeringΤμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering
dc.contributor.orcidKyratsi, Theodora [0000-0003-2916-1708]

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