Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/50956
Title: Hydrothermally-altered feldspar reduces metal toxicity and promotes plant growth in highly metal-contaminated soils
Keywords: Aided phytostabilization
Metal extractability
Soil remediation
Heavy metals
Soil amendments
Fitoestabilização
Metais - Extrabilidade
Remediação do solo
Metais pesados
Solos - Contaminação
Issue Date: Jan-2022
Publisher: Elsevier
Citation: RIBEIRO, P. G. et al. Hydrothermally-altered feldspar reduces metal toxicity and promotes plant growth in highly metal-contaminated soils. Chemosphere, [S.I.], v. 286, 131768, Jan. 2022. DOI: https://doi.org/10.1016/j.chemosphere.2021.131768.
Abstract: Novel green technologies for soil remediation have been focusing on altering soil properties and improving soil health. Hydrothermally-altered feldspar (HYP, HydroPotash), recently developed, is being related as both an efficient amendment to immobilize heavy metals in soils and a plant nutrients source, consisting in a promising technology for revegetation of contaminated sites. In order to evaluate the effectiveness of using HYP for phytostabilization programs, two different soils (Technosol and Oxisol) collected from a smelting site were amended with increasing doses of HYPs (HYP-1 and HYP-2): 15, 30, 60, and 120 Mg ha−1. For comparison, a control (soil without amendment) and a soil amended with zeolite (clinoptilolite) were also included as treatments. After 90 days of incubation, HYPs decreased up to 83.8 % of Cd availability and reduced exchangeable Al up to 100 %. HydroPotash increased pH, cation exchange capacity, and contents of potassium, calcium, and phosphorus, as well as microbial biomass carbon, and fluorescein diacetate hydrolysis of soils. Andropogon gayanus, Eucalyptus grandis, and Heterocondylus vitalbae started growing from the dose of 15 Mg ha−1 HYPs in the Oxisol and 60 Mg ha−1 HYPs in the Technosol. Principal component analysis indicates that plant shoot dry weight was negatively correlated with extractable Cd and Zn and positively with pH, CEC, and Ca content. Besides promoting plant growth, HYPs reduced heavy metals (Cd and Zn) absorption by plants, indicating that HYP has potential use as an amendment in phytostabilization programs.
URI: https://doi.org/10.1016/j.chemosphere.2021.131768
http://repositorio.ufla.br/jspui/handle/1/50956
Appears in Collections:DCS - Artigos publicados em periódicos

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