Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal

Abstract Co-combustion of municipal excess sludge (ES) and coal provides an alternative method for disposing ES. The present study aims to investigate the residual and ecological risk of heavy metals in fly ash from co-combustion of ES and coal. The total concentration and speciation distribution of...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yao Tang, Jingshi Pan, Biqing Li, Suying Zhao, Liguo Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0d8a735e2ad54c6387d14b06b83cde10
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:0d8a735e2ad54c6387d14b06b83cde10
record_format	dspace
spelling	oai:doaj.org-article:0d8a735e2ad54c6387d14b06b83cde102021-12-02T14:16:34ZResidual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal10.1038/s41598-021-81812-52045-2322https://doaj.org/article/0d8a735e2ad54c6387d14b06b83cde102021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81812-5https://doaj.org/toc/2045-2322Abstract Co-combustion of municipal excess sludge (ES) and coal provides an alternative method for disposing ES. The present study aims to investigate the residual and ecological risk of heavy metals in fly ash from co-combustion of ES and coal. The total concentration and speciation distribution of heavy metals, characterization of SEM, EDX, XRD and leaching test were carried out to assess the fly ash in this study. The results showed that the total concentrations of Cu, Zn and Mn were higher than others in fly ash, and most heavy metals were concentrated in fine particles. For Cd, Cr and Pb, the percentages of speciation of F4 and F5 were all over 90%, suggesting the relatively lower leaching toxicity. The leaching percent of all heavy metals was lower than 5% by two diluted HNO3 solutions for fly ash. The potential ecological risks increased with the decrease of particle size of fly ash, and Cd accounted for the main fraction for ecological risk despite of lower concentration in comparison to other measured heavy metals.Yao TangJingshi PanBiqing LiSuying ZhaoLiguo ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yao Tang Jingshi Pan Biqing Li Suying Zhao Liguo Zhang Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal
description	Abstract Co-combustion of municipal excess sludge (ES) and coal provides an alternative method for disposing ES. The present study aims to investigate the residual and ecological risk of heavy metals in fly ash from co-combustion of ES and coal. The total concentration and speciation distribution of heavy metals, characterization of SEM, EDX, XRD and leaching test were carried out to assess the fly ash in this study. The results showed that the total concentrations of Cu, Zn and Mn were higher than others in fly ash, and most heavy metals were concentrated in fine particles. For Cd, Cr and Pb, the percentages of speciation of F4 and F5 were all over 90%, suggesting the relatively lower leaching toxicity. The leaching percent of all heavy metals was lower than 5% by two diluted HNO3 solutions for fly ash. The potential ecological risks increased with the decrease of particle size of fly ash, and Cd accounted for the main fraction for ecological risk despite of lower concentration in comparison to other measured heavy metals.
format	article
author	Yao Tang Jingshi Pan Biqing Li Suying Zhao Liguo Zhang
author_facet	Yao Tang Jingshi Pan Biqing Li Suying Zhao Liguo Zhang
author_sort	Yao Tang
title	Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal
title_short	Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal
title_full	Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal
title_fullStr	Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal
title_full_unstemmed	Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal
title_sort	residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0d8a735e2ad54c6387d14b06b83cde10
work_keys_str_mv	AT yaotang residualandecologicalriskassessmentofheavymetalsinflyashfromcocombustionofexcesssludgeandcoal AT jingshipan residualandecologicalriskassessmentofheavymetalsinflyashfromcocombustionofexcesssludgeandcoal AT biqingli residualandecologicalriskassessmentofheavymetalsinflyashfromcocombustionofexcesssludgeandcoal AT suyingzhao residualandecologicalriskassessmentofheavymetalsinflyashfromcocombustionofexcesssludgeandcoal AT liguozhang residualandecologicalriskassessmentofheavymetalsinflyashfromcocombustionofexcesssludgeandcoal
_version_	1718391648661012480

Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal

Ejemplares similares