The Immobilisation of Heavy Metals from Sewage Sludge Ash in CO<sub>2</sub>-Cured Mortars

Sewage treatment processes are a serious environmental threat due to the difficulties involved in its waste management and disposal. Therefore, one developing trend in sewage sludge processing is its thermal treatment, which generates sewage sludge ash that may contain many environmental pollutants,...

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Autores principales:	Erick Grünhäuser Soares, João Castro-Gomes, Mateusz Sitarz, Tomasz Zdeb, Izabela Hager
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	CO<sub>2</sub>-cured mortar CO<sub>2</sub> adsorption heavy metal immobilisation leaching sewage sludge ash electric arc furnace slag Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/8e258046d513488c9fbfa57535235f34
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spelling	oai:doaj.org-article:8e258046d513488c9fbfa57535235f342021-11-25T19:05:17ZThe Immobilisation of Heavy Metals from Sewage Sludge Ash in CO<sub>2</sub>-Cured Mortars10.3390/su1322128932071-1050https://doaj.org/article/8e258046d513488c9fbfa57535235f342021-11-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/22/12893https://doaj.org/toc/2071-1050Sewage treatment processes are a serious environmental threat due to the difficulties involved in its waste management and disposal. Therefore, one developing trend in sewage sludge processing is its thermal treatment, which generates sewage sludge ash that may contain many environmental pollutants, such as heavy metals. Moreover, due to the European Union requirements that not only focus on the waste generation reduction but also on its reuse and final disposal, it is essential to pursue new applications of such resources, such as the waste-based material incorporation into alternative cementitious materials. Thus, this study evaluated the heavy metals leachability of CO<sub>2</sub>-cured mortars incorporating sewage sludge ash as filler. For this purpose, Portland cement, reactive magnesia, and electric arc furnace slag were used to produce three different CO<sub>2</sub>-cured mortars, which were cured though pressurised accelerated carbonation curing for 24h. These mortars presented up to 12.7 MPa as compressive strength and their carbonation was confirmed by TG-DTG and FT-IR analyses. Their leachability of heavy metals met the European requirements for all waste materials, including inert materials, and post-industrial wastewater. Therefore, the immobilisation of heavy metals in this binding technology may be considered an effective method to safely manage sewage sludge ash.Erick Grünhäuser SoaresJoão Castro-GomesMateusz SitarzTomasz ZdebIzabela HagerMDPI AGarticleCO<sub>2</sub>-cured mortarCO<sub>2</sub> adsorptionheavy metal immobilisationleachingsewage sludge ashelectric arc furnace slagEnvironmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 12893, p 12893 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CO<sub>2</sub>-cured mortar CO<sub>2</sub> adsorption heavy metal immobilisation leaching sewage sludge ash electric arc furnace slag Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
spellingShingle	CO<sub>2</sub>-cured mortar CO<sub>2</sub> adsorption heavy metal immobilisation leaching sewage sludge ash electric arc furnace slag Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Erick Grünhäuser Soares João Castro-Gomes Mateusz Sitarz Tomasz Zdeb Izabela Hager The Immobilisation of Heavy Metals from Sewage Sludge Ash in CO<sub>2</sub>-Cured Mortars
description	Sewage treatment processes are a serious environmental threat due to the difficulties involved in its waste management and disposal. Therefore, one developing trend in sewage sludge processing is its thermal treatment, which generates sewage sludge ash that may contain many environmental pollutants, such as heavy metals. Moreover, due to the European Union requirements that not only focus on the waste generation reduction but also on its reuse and final disposal, it is essential to pursue new applications of such resources, such as the waste-based material incorporation into alternative cementitious materials. Thus, this study evaluated the heavy metals leachability of CO<sub>2</sub>-cured mortars incorporating sewage sludge ash as filler. For this purpose, Portland cement, reactive magnesia, and electric arc furnace slag were used to produce three different CO<sub>2</sub>-cured mortars, which were cured though pressurised accelerated carbonation curing for 24h. These mortars presented up to 12.7 MPa as compressive strength and their carbonation was confirmed by TG-DTG and FT-IR analyses. Their leachability of heavy metals met the European requirements for all waste materials, including inert materials, and post-industrial wastewater. Therefore, the immobilisation of heavy metals in this binding technology may be considered an effective method to safely manage sewage sludge ash.
format	article
author	Erick Grünhäuser Soares João Castro-Gomes Mateusz Sitarz Tomasz Zdeb Izabela Hager
author_facet	Erick Grünhäuser Soares João Castro-Gomes Mateusz Sitarz Tomasz Zdeb Izabela Hager
author_sort	Erick Grünhäuser Soares
title	The Immobilisation of Heavy Metals from Sewage Sludge Ash in CO<sub>2</sub>-Cured Mortars
title_short	The Immobilisation of Heavy Metals from Sewage Sludge Ash in CO<sub>2</sub>-Cured Mortars
title_full	The Immobilisation of Heavy Metals from Sewage Sludge Ash in CO<sub>2</sub>-Cured Mortars
title_fullStr	The Immobilisation of Heavy Metals from Sewage Sludge Ash in CO<sub>2</sub>-Cured Mortars
title_full_unstemmed	The Immobilisation of Heavy Metals from Sewage Sludge Ash in CO<sub>2</sub>-Cured Mortars
title_sort	immobilisation of heavy metals from sewage sludge ash in co<sub>2</sub>-cured mortars
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8e258046d513488c9fbfa57535235f34
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The Immobilisation of Heavy Metals from Sewage Sludge Ash in CO<sub>2</sub>-Cured Mortars

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