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Minerals 2014, 4(3), 746-757; https://doi.org/10.3390/min4030746

Technological Proposals for Recycling Industrial Wastes for Environmental Applications

1
Departamento de Física de la Materia Condensada, Universidad de Sevilla, Av. Reina Mercedes s/n, 41012 Seville, Spain
2
Instituto de Ciencia de Materiales de Sevilla (CSIC-US), Av. Americo Vespucio 49, 41092 Seville, Spain
3
Departamento de Ciencias de la Tierra, Universidad de Cádiz, 11510 Puerto Real, Spain
4
Antiquum Monumentum, SL, C/ Calatrava, 33, 11100 San Fernando, Cádiz, Spain
*
Author to whom correspondence should be addressed.
Received: 30 May 2014 / Revised: 15 July 2014 / Accepted: 29 July 2014 / Published: 8 August 2014
(This article belongs to the Special Issue CO2 Sequestration by Mineral Carbonation: Challenges and Advances)
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Abstract

A two-fold objective is proposed for this research: removing hazardous and unpleasant wastes and mitigating the emissions of green house gasses in the atmosphere. Thus, the first aim of this work is to identify, characterize and recycle industrial wastes with high contents of calcium or sodium. This involves synthesizing materials with the ability for CO2 sequestration as preliminary work for designing industrial processes, which involve a reduction of CO2 emissions. In this regard, phosphogypsum from the fertilizer industry and liquid wastes from the green olive and bauxite industries have been considered as precursors. Following a very simple procedure, Ca-bearing phosphogypsum wastes are mixed with Na-bearing liquid wastes in order to obtain a harmless liquid phase and an active solid phase, which may act as a carbon sequestration agent. In this way, wastes, which are unable to fix CO2 by themselves, can be successfully turned into effective CO2 sinks. The CO2 sequestration efficiency and the CO2 fixation power of the procedure based on these wastes are assessed. View Full-Text
Keywords: greenhouse gases; CO2 sequestration; phosphogypsum; industrial waste greenhouse gases; CO2 sequestration; phosphogypsum; industrial waste
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MDPI and ACS Style

Romero-Hermida, I.; Morales-Flórez, V.; Santos, A.; Villena, A.; Esquivias, L. Technological Proposals for Recycling Industrial Wastes for Environmental Applications. Minerals 2014, 4, 746-757.

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