Technological Proposals for Recycling Industrial Wastes for Environmental Applications

Minerals

Isabel Romero-Hermida²  Vໜtor Morales-Flórez²  Alberto Santos¹  Antonio Villena³ 

[1] Departamento de Ciencias de la Tierra, Universidad de Cádiz, 11510 Puerto Real, Spain; E-Mail:;Departamento de Física de la Materia Condensada, Universidad de Sevilla, Av. Reina Mercedes s/n, 41012 Seville, Spain; E-Mails:;Antiquum Monumentum, SL, C/ Calatrava, 33, 11100 San Fernando, Cádiz, Spain; E-Mail:

关键词: greenhouse gases;    CO₂ sequestration;    phosphogypsum;    industrial waste;   

DOI  :  10.3390/min4030746

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.