Development of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water

As an alternative for ordinary Portland cement, geopolymers are cost effective materials that can be prepared with relatively low energy consumption and substantial reduction of CO2 emissions. In the present study the characteristics of novel hybrid composite of geopolymer foam (GPF)/polylactic acid...

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Autores principales:	Flávio James Humberto Tommasini Vieira Ramos, Maria de Fátima Vieira Marques, João Gabriel Passos Rodrigues, Vinícius de Oliveira Aguiar, Fernanda Santos da Luz, Afonso Rangel Garcez de Azevedo, Sergio Neves Monteiro
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Geopolymer Poly(lactic acid) Composites Foam Heavy metal Sustainable Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/d27f9a14b98544a08ee5d0d65a420837
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spelling	oai:doaj.org-article:d27f9a14b98544a08ee5d0d65a4208372021-11-24T04:31:09ZDevelopment of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water2214-509510.1016/j.cscm.2021.e00795https://doaj.org/article/d27f9a14b98544a08ee5d0d65a4208372022-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214509521003107https://doaj.org/toc/2214-5095As an alternative for ordinary Portland cement, geopolymers are cost effective materials that can be prepared with relatively low energy consumption and substantial reduction of CO2 emissions. In the present study the characteristics of novel hybrid composite of geopolymer foam (GPF)/polylactic acid (PLA) and their efficiency in removing copper(II) and zinc(II) to treat high volumes of polluted water are investigated. Contrary to the conventional methods for removing heavy metals, the newly developed composites are ecological, low-cost, easily available, and economically viable alternatives providing good physical-chemical stability, ion-exchange properties, and a porous structure. Based on the sustainable advantage to produce geopolymers from recycled materials, GPFs were obtained from blast furnace slag (BFS) by reacting 20 ml of an 8 M alkaline solution of sodium metasilicate (Na2SiO3) with BFS particles and later addition of hydrogen peroxide. GPFs were produced with a stoichiometry of 1.4 and 1.6 g/L between BFS/alkali solution with a 1.6 ml solution of hydrogen peroxide 50% to develop porosity into the materials. Finally, the GPFs were coated with PLA. Specimens of GPF/PLA composites were characterized by X-ray fluorescence spectroscopy, Fourier transformed infrared spectroscopy, thermogravimetric analysis, dynamic mechanical analysis, and field emission gun scanning electron microscopy. Adsorption analysis of Cu(II) and Zn(II), as well as ion-exchanges from aqueous solution through the composite with 1.4 and 1.6 stoichiometry, were performed using deionized water containing 0.80% Cu(II) or Zn(II). The test resulted in high performance for retaining Cu(II) and Zn(II). Under CO2 pressure at 50 bar, the gas permeation tests confirmed porous formations into the geopolymer foams coated with molten PLA.Flávio James Humberto Tommasini Vieira RamosMaria de Fátima Vieira MarquesJoão Gabriel Passos RodriguesVinícius de Oliveira AguiarFernanda Santos da LuzAfonso Rangel Garcez de AzevedoSergio Neves MonteiroElsevierarticleGeopolymerPoly(lactic acid)CompositesFoamHeavy metalSustainableMaterials of engineering and construction. Mechanics of materialsTA401-492ENCase Studies in Construction Materials, Vol 16, Iss , Pp e00795- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geopolymer Poly(lactic acid) Composites Foam Heavy metal Sustainable Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Geopolymer Poly(lactic acid) Composites Foam Heavy metal Sustainable Materials of engineering and construction. Mechanics of materials TA401-492 Flávio James Humberto Tommasini Vieira Ramos Maria de Fátima Vieira Marques João Gabriel Passos Rodrigues Vinícius de Oliveira Aguiar Fernanda Santos da Luz Afonso Rangel Garcez de Azevedo Sergio Neves Monteiro Development of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water
description	As an alternative for ordinary Portland cement, geopolymers are cost effective materials that can be prepared with relatively low energy consumption and substantial reduction of CO2 emissions. In the present study the characteristics of novel hybrid composite of geopolymer foam (GPF)/polylactic acid (PLA) and their efficiency in removing copper(II) and zinc(II) to treat high volumes of polluted water are investigated. Contrary to the conventional methods for removing heavy metals, the newly developed composites are ecological, low-cost, easily available, and economically viable alternatives providing good physical-chemical stability, ion-exchange properties, and a porous structure. Based on the sustainable advantage to produce geopolymers from recycled materials, GPFs were obtained from blast furnace slag (BFS) by reacting 20 ml of an 8 M alkaline solution of sodium metasilicate (Na2SiO3) with BFS particles and later addition of hydrogen peroxide. GPFs were produced with a stoichiometry of 1.4 and 1.6 g/L between BFS/alkali solution with a 1.6 ml solution of hydrogen peroxide 50% to develop porosity into the materials. Finally, the GPFs were coated with PLA. Specimens of GPF/PLA composites were characterized by X-ray fluorescence spectroscopy, Fourier transformed infrared spectroscopy, thermogravimetric analysis, dynamic mechanical analysis, and field emission gun scanning electron microscopy. Adsorption analysis of Cu(II) and Zn(II), as well as ion-exchanges from aqueous solution through the composite with 1.4 and 1.6 stoichiometry, were performed using deionized water containing 0.80% Cu(II) or Zn(II). The test resulted in high performance for retaining Cu(II) and Zn(II). Under CO2 pressure at 50 bar, the gas permeation tests confirmed porous formations into the geopolymer foams coated with molten PLA.
format	article
author	Flávio James Humberto Tommasini Vieira Ramos Maria de Fátima Vieira Marques João Gabriel Passos Rodrigues Vinícius de Oliveira Aguiar Fernanda Santos da Luz Afonso Rangel Garcez de Azevedo Sergio Neves Monteiro
author_facet	Flávio James Humberto Tommasini Vieira Ramos Maria de Fátima Vieira Marques João Gabriel Passos Rodrigues Vinícius de Oliveira Aguiar Fernanda Santos da Luz Afonso Rangel Garcez de Azevedo Sergio Neves Monteiro
author_sort	Flávio James Humberto Tommasini Vieira Ramos
title	Development of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water
title_short	Development of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water
title_full	Development of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water
title_fullStr	Development of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water
title_full_unstemmed	Development of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water
title_sort	development of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/d27f9a14b98544a08ee5d0d65a420837
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Development of novel geopolymeric foam composites coated with polylactic acid to remove heavy metals from contaminated water

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