Diminishing Heavy Metal Hazards of Contaminated Soil via Biochar Supplementation

Depending on the geochemical forms, heavy metal (HM) accumulation is one of the most serious environmental problems in the world and poses negative impacts on soil, plants, animals, and humans. Although the use of biochar to remediate contaminated soils is well known, the huge quantities of waste us...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Mahrous Awad, Mahmuod M. El-Sayed, Xiang Li, Zhongzhen Liu, Syed Khalid Mustafa, Allah Ditta, Kamel Hessini
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	heavy metals garden biochar pyrolysis speciation availability Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/dbd3f2ae70fc41b6876fb68e160e90e7
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:dbd3f2ae70fc41b6876fb68e160e90e7
record_format	dspace
spelling	oai:doaj.org-article:dbd3f2ae70fc41b6876fb68e160e90e72021-11-25T19:03:59ZDiminishing Heavy Metal Hazards of Contaminated Soil via Biochar Supplementation10.3390/su1322127422071-1050https://doaj.org/article/dbd3f2ae70fc41b6876fb68e160e90e72021-11-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/22/12742https://doaj.org/toc/2071-1050Depending on the geochemical forms, heavy metal (HM) accumulation is one of the most serious environmental problems in the world and poses negative impacts on soil, plants, animals, and humans. Although the use of biochar to remediate contaminated soils is well known, the huge quantities of waste used and its recycling technique to sustain soil in addition to its use conditions are determinant factors for its characteristics and uses. A pot experiment was conducted in a completely randomized block design to evaluate metal forms and their availability under the application of garden waste biochar (GB) pyrolyzed at different temperatures, and a sequential extraction procedure was designed to fractionate Pb, Cd, Zn, and Cu of the contaminated soil. The results show that the TCLP-extractable Pb, Cd, Zn, and Cu were significantly decreased depending on the biochar addition rate, pyrolysis temperature, and tested metal. The acid extractable fraction was significantly decreased by 51.54, 26.42, 16.01, and 74.13% for Pb, Cd, Zn, and Cu, respectively, at the highest application level of GB<sub>400</sub> compared to untreated pots. On the other hand, the organic matter bound fraction increased by 76.10, 54.69, 23.72, and 43.87% for the corresponding metals. The Fe/Mn oxide bound fraction was the predominant portion of lead (57.25–62.84%), whereas the acid fraction was major in the case of Cd (58.06–77.05%). The availability of these metals varied according to the application rate, pyrolysis temperature, and examined metals. Therefore, the GB is a nominee as a promising practice to reduce HM risks, especially pyrolyzed at 400 °C by converting the available fraction into unavailable ones.Mahrous AwadMahmuod M. El-SayedXiang LiZhongzhen LiuSyed Khalid MustafaAllah DittaKamel HessiniMDPI AGarticleheavy metalsgarden biocharpyrolysisspeciationavailabilityEnvironmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 12742, p 12742 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	heavy metals garden biochar pyrolysis speciation availability Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
spellingShingle	heavy metals garden biochar pyrolysis speciation availability Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Mahrous Awad Mahmuod M. El-Sayed Xiang Li Zhongzhen Liu Syed Khalid Mustafa Allah Ditta Kamel Hessini Diminishing Heavy Metal Hazards of Contaminated Soil via Biochar Supplementation
description	Depending on the geochemical forms, heavy metal (HM) accumulation is one of the most serious environmental problems in the world and poses negative impacts on soil, plants, animals, and humans. Although the use of biochar to remediate contaminated soils is well known, the huge quantities of waste used and its recycling technique to sustain soil in addition to its use conditions are determinant factors for its characteristics and uses. A pot experiment was conducted in a completely randomized block design to evaluate metal forms and their availability under the application of garden waste biochar (GB) pyrolyzed at different temperatures, and a sequential extraction procedure was designed to fractionate Pb, Cd, Zn, and Cu of the contaminated soil. The results show that the TCLP-extractable Pb, Cd, Zn, and Cu were significantly decreased depending on the biochar addition rate, pyrolysis temperature, and tested metal. The acid extractable fraction was significantly decreased by 51.54, 26.42, 16.01, and 74.13% for Pb, Cd, Zn, and Cu, respectively, at the highest application level of GB<sub>400</sub> compared to untreated pots. On the other hand, the organic matter bound fraction increased by 76.10, 54.69, 23.72, and 43.87% for the corresponding metals. The Fe/Mn oxide bound fraction was the predominant portion of lead (57.25–62.84%), whereas the acid fraction was major in the case of Cd (58.06–77.05%). The availability of these metals varied according to the application rate, pyrolysis temperature, and examined metals. Therefore, the GB is a nominee as a promising practice to reduce HM risks, especially pyrolyzed at 400 °C by converting the available fraction into unavailable ones.
format	article
author	Mahrous Awad Mahmuod M. El-Sayed Xiang Li Zhongzhen Liu Syed Khalid Mustafa Allah Ditta Kamel Hessini
author_facet	Mahrous Awad Mahmuod M. El-Sayed Xiang Li Zhongzhen Liu Syed Khalid Mustafa Allah Ditta Kamel Hessini
author_sort	Mahrous Awad
title	Diminishing Heavy Metal Hazards of Contaminated Soil via Biochar Supplementation
title_short	Diminishing Heavy Metal Hazards of Contaminated Soil via Biochar Supplementation
title_full	Diminishing Heavy Metal Hazards of Contaminated Soil via Biochar Supplementation
title_fullStr	Diminishing Heavy Metal Hazards of Contaminated Soil via Biochar Supplementation
title_full_unstemmed	Diminishing Heavy Metal Hazards of Contaminated Soil via Biochar Supplementation
title_sort	diminishing heavy metal hazards of contaminated soil via biochar supplementation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/dbd3f2ae70fc41b6876fb68e160e90e7
work_keys_str_mv	AT mahrousawad diminishingheavymetalhazardsofcontaminatedsoilviabiocharsupplementation AT mahmuodmelsayed diminishingheavymetalhazardsofcontaminatedsoilviabiocharsupplementation AT xiangli diminishingheavymetalhazardsofcontaminatedsoilviabiocharsupplementation AT zhongzhenliu diminishingheavymetalhazardsofcontaminatedsoilviabiocharsupplementation AT syedkhalidmustafa diminishingheavymetalhazardsofcontaminatedsoilviabiocharsupplementation AT allahditta diminishingheavymetalhazardsofcontaminatedsoilviabiocharsupplementation AT kamelhessini diminishingheavymetalhazardsofcontaminatedsoilviabiocharsupplementation
_version_	1718410368833814528

Diminishing Heavy Metal Hazards of Contaminated Soil via Biochar Supplementation

Ejemplares similares