Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost

Anthropogenic activities can lead to elevated concentrations of potentially toxic elements (PTEs) in soil and water. Thus, the search for low-cost, ecofriendly and innovative sorbents is a global necessity. The present investigation addresses the performance of peat and compost derived from the orga...

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Autores principales:	Jacqueline Zanin Lima, Renan Marques Lupion, Isabela Monici Raimondi, Osni José Pejon, Valéria Guimarães Silvestre Rodrigues
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cadmium lead zinc organic fraction of municipal solid waste batch experiments human bioaccessibility Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/2962ca5425094155a97a262117b9901c
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spelling	oai:doaj.org-article:2962ca5425094155a97a262117b9901c2021-11-25T19:04:52ZSorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost10.3390/su1322128472071-1050https://doaj.org/article/2962ca5425094155a97a262117b9901c2021-11-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/22/12847https://doaj.org/toc/2071-1050Anthropogenic activities can lead to elevated concentrations of potentially toxic elements (PTEs) in soil and water. Thus, the search for low-cost, ecofriendly and innovative sorbents is a global necessity. The present investigation addresses the performance of peat and compost derived from the organic fraction of municipal solid waste (OFMSW) as a sorbent of zinc (Zn), lead (Pb) and cadmium (Cd). The physicochemical features and effects of the initial concentration (equilibrium) and contact time (kinetic) were systematically analyzed by batch experiments. In addition, human bioaccessibility tests were conducted to compare the human health risk of these PTEs postsorption. The results showed that the sorption capacities followed the order: compost(Pb) > peat(Pb) > compost(Cd) > compost(Zn) > peat(Cd) > peat(Zn), indicating that compost had a better sorption potential. Kinetic data were well-fitted to the pseudo-first-order (PSO), pseudo-second-order (PFO), and Elovich equation models. The external diffusion model proposed by Mathews and Weber (M&W) indicated the contribution of diffusion as a sorption mechanism, mainly in the sorption of Zn, Pb and Cd onto compost and Pb onto peat. The bioaccessible fractions in the first stage (stomach conditions) were greater than those in the second phase (intestinal simulation). Pb has higher sorption capacities (10.511 and 7.778 mg g<sup>−1</sup> for compost and peat, respectively) and lowers fraction bioaccessible (35 to 70%). These findings demonstrate that utilizing these low-cost sorbents seems promising for the remediation of PTE soils and contaminated waters. However, more experiments should be conducted, including desorption and multielement solutions, as well as field-tests to prove the long-term effects of application in large-scale and real conditions.Jacqueline Zanin LimaRenan Marques LupionIsabela Monici RaimondiOsni José PejonValéria Guimarães Silvestre RodriguesMDPI AGarticlecadmiumleadzincorganic fraction of municipal solid wastebatch experimentshuman bioaccessibilityEnvironmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 12847, p 12847 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cadmium lead zinc organic fraction of municipal solid waste batch experiments human bioaccessibility Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
spellingShingle	cadmium lead zinc organic fraction of municipal solid waste batch experiments human bioaccessibility Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Jacqueline Zanin Lima Renan Marques Lupion Isabela Monici Raimondi Osni José Pejon Valéria Guimarães Silvestre Rodrigues Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost
description	Anthropogenic activities can lead to elevated concentrations of potentially toxic elements (PTEs) in soil and water. Thus, the search for low-cost, ecofriendly and innovative sorbents is a global necessity. The present investigation addresses the performance of peat and compost derived from the organic fraction of municipal solid waste (OFMSW) as a sorbent of zinc (Zn), lead (Pb) and cadmium (Cd). The physicochemical features and effects of the initial concentration (equilibrium) and contact time (kinetic) were systematically analyzed by batch experiments. In addition, human bioaccessibility tests were conducted to compare the human health risk of these PTEs postsorption. The results showed that the sorption capacities followed the order: compost(Pb) > peat(Pb) > compost(Cd) > compost(Zn) > peat(Cd) > peat(Zn), indicating that compost had a better sorption potential. Kinetic data were well-fitted to the pseudo-first-order (PSO), pseudo-second-order (PFO), and Elovich equation models. The external diffusion model proposed by Mathews and Weber (M&W) indicated the contribution of diffusion as a sorption mechanism, mainly in the sorption of Zn, Pb and Cd onto compost and Pb onto peat. The bioaccessible fractions in the first stage (stomach conditions) were greater than those in the second phase (intestinal simulation). Pb has higher sorption capacities (10.511 and 7.778 mg g<sup>−1</sup> for compost and peat, respectively) and lowers fraction bioaccessible (35 to 70%). These findings demonstrate that utilizing these low-cost sorbents seems promising for the remediation of PTE soils and contaminated waters. However, more experiments should be conducted, including desorption and multielement solutions, as well as field-tests to prove the long-term effects of application in large-scale and real conditions.
format	article
author	Jacqueline Zanin Lima Renan Marques Lupion Isabela Monici Raimondi Osni José Pejon Valéria Guimarães Silvestre Rodrigues
author_facet	Jacqueline Zanin Lima Renan Marques Lupion Isabela Monici Raimondi Osni José Pejon Valéria Guimarães Silvestre Rodrigues
author_sort	Jacqueline Zanin Lima
title	Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost
title_short	Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost
title_full	Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost
title_fullStr	Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost
title_full_unstemmed	Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost
title_sort	sorption efficiency of potentially toxic elements onto low-cost materials: peat and compost
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2962ca5425094155a97a262117b9901c
work_keys_str_mv	AT jacquelinezaninlima sorptionefficiencyofpotentiallytoxicelementsontolowcostmaterialspeatandcompost AT renanmarqueslupion sorptionefficiencyofpotentiallytoxicelementsontolowcostmaterialspeatandcompost AT isabelamoniciraimondi sorptionefficiencyofpotentiallytoxicelementsontolowcostmaterialspeatandcompost AT osnijosepejon sorptionefficiencyofpotentiallytoxicelementsontolowcostmaterialspeatandcompost AT valeriaguimaraessilvestrerodrigues sorptionefficiencyofpotentiallytoxicelementsontolowcostmaterialspeatandcompost
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Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost

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