Memorias de investigación
Artículos en revistas:
Effects of pH Conditions and Application Rates of Commercial Humic Substances on Cu and Zn Mobility in Anthropogenic Mine Soils
Año:2019
Áreas de investigación
  • Degradación del medio ambiente
Datos
Descripción
We studied the effects of commercial humic substances derived from leonardite at different rates (0, 0.25, 2, 10 g kg?1) and pH (4.5, 6.0, 8.0) on Cu and Zn mobility, to evaluate their use for remediation of metal contaminated mine soils and to optimize their application conditions. We conducted a single-step extraction experiment and analyzed extracts for metal concentrations, soluble organic carbon and their E4/E6 ratio (ratio of absorption at 465 to 665 nm). Metal speciation in a soil solution was simulated by the non-ideal competitive adsorption-Donnan (NICA-Donnan) model. Increasing the amount of humic substances and the pH caused higher release rates of soluble organic carbon with a lower humic/fulvic acids ratio. This led to a higher mobility of metals (up to 110 times Cu concentration in control and 12 times for Zn) due to the formation of soluble metal-humic complexes. Speciation modeling predicted that increasing rates of humic substances would result in a higher proportion of Cu and Zn associated with fulvic acids, more mobile than the humic acids fraction. Application of commercial leonardite humic substances at 2?10 g kg?1 and with pH levels similar to or below natural soil could be useful for assisted-phytoextraction of contaminated anthropogenic soils. High rates of humic substances in more alkaline conditions could entail a considerable risk of metal leaching to groundwater, toxicity and transfer to the trophic chain
Internacional
Si
JCR del ISI
Si
Título de la revista
Sustainability
ISSN
2071-1050
Factor de impacto JCR
2,576
Información de impacto
Datos JCR del año 2019
Volumen
11
DOI
10.3390/su11184844
Número de revista
4844
Desde la página
1
Hasta la página
13
Mes
SEPTIEMBRE
Ranking
JCR Impact index 2.576 Environmental Sciences 120/265 Q2 en 2019
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Calidad de Suelos y Aplicaciones medioambientales
  • Departamento: Producción Agraria