Adsorption and release of micronutrients by humin extracted from peat samples

Author(s)

Goveia, Danielle ^[1] ; Melo, Camila de A. ^{[1, 2]} ; de Oliveira, Lilian K. ^{[1, 2]} ; Fraceto, Leonardo F. ^[2] ; Rocha, Julio Cesar ^[1] ; Dias Filho, Newton Luiz ^[3] ; Rosa, Andre Henrique ^[2]

Affiliation

^[1] Univ Estadual Paulista UNESP, Inst Quim Araraquara, BR-14800900 Araraquara, SP - Brazil

^[2] Univ Estadual Paulista UNESP, Dept Engn Ambiental, BR-18087180 Sorocaba, SP - Brazil

^[3] Univ Estadual Paulista UNESP, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP - Brazil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 24, n. 5, p. 721-730, MAY 2013.
• Web of Science Citations: 9

Abstract

The objective of this work was to investigate the adsorption of micronutrients in humin and to verify the ability to release these elements in water. The first step was to determine the adsorption capacity of humin for several essential plant micronutrients and check the kinetic parameters. The order of adsorption was Zn < Ni < Co < Mn < Mo < Cu < Fe, whereas Zn showed maximum values of ca. 2.5 mg g-1 and Fe values of ca. 0.5 mg g-1 for systems containing 1 g of humin. Iron presented higher percentages of release (ca. 100%) and Co the lowest percentages (0.14%). The findings suggested that the use of humin enriched with micronutrients can be a promising alternative for the fertilization of agricultural soils, with the additional benefit of incorporating organic matter present in the form of humic substances into the soil and improving the agricultural productivity. (AU)

• FAPESP's process: 10/12210-1 - EVALUATION OF THE USE HUMIC SUBTANCES/TURFS FOR MODIFIED RELEASE OF NUTRIENTS IN SOIL
• Grantee: Camila de Almeida Melo
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/15768-3 - Metal speciation dynamics: from nanoparticles to colloidal ligand dispersions
• Grantee: Danielle Goveia
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 10/11570-4 - Development of polymeric spheres containing humic substances/peat: a new system for modified release of macro and micronutrients for soils
• Grantee: André Henrique Rosa
• Support Opportunities: Regular Research Grants