The increase in the amount of carbon dioxide (CO 2 ) emissions related to many anthropic activities is a persistent and growing problem. During the last years, many solutions have been set out, none of them being the ultimate one. Investigators agree on the need of a synergic approach to the problem, in terms of many complementary methods of sequestration that, combined with the reduction of production, will be able to decrease the concentration of the CO 2 in the atmosphere. In this work, we explore the use of a green reaction to trap the CO 2 into a stable crystalline phase (weddellite) resorting to a multidisciplinary approach. CO 2 is reduced and precipitated as calcium oxalate through vitamin C as a sacrificial reductant. Calcium oxalate crystals obtained show a startling good quality that increases their already great stability over a wide chemical and physical conditions' range.

CO 2 capture and sequestration in stable Ca-oxalate, via Ca-ascorbate promoted green reaction

Pastero, Linda;Curetti, Nadia;Destefanis, Enrico;Pavese, Alessandro
2019

Abstract

The increase in the amount of carbon dioxide (CO 2 ) emissions related to many anthropic activities is a persistent and growing problem. During the last years, many solutions have been set out, none of them being the ultimate one. Investigators agree on the need of a synergic approach to the problem, in terms of many complementary methods of sequestration that, combined with the reduction of production, will be able to decrease the concentration of the CO 2 in the atmosphere. In this work, we explore the use of a green reaction to trap the CO 2 into a stable crystalline phase (weddellite) resorting to a multidisciplinary approach. CO 2 is reduced and precipitated as calcium oxalate through vitamin C as a sacrificial reductant. Calcium oxalate crystals obtained show a startling good quality that increases their already great stability over a wide chemical and physical conditions' range.
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1232
1244
www.elsevier.com/locate/scitotenv
Ascorbic acid; Calcium ascorbate; Calcium oxalate; Carbon dioxide; Sequestration; Weddellite; Environmental Engineering; Environmental Chemistry; Waste Management and Disposal; Pollution
Pastero, Linda*; Curetti, Nadia; Ortenzi, Marco Aldo; Schiavoni, Marco; Destefanis, Enrico; Pavese, Alessandro
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/1695283
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