Adsorption and release of micronutrients by humin extracted from peat samples

Journal of the Brazilian Chemical Society

Rocha, Julio Cesar¹  Universidade Estadual Paulista (UNESP), Ilha Solteira, Brazil¹  Goveia, Danielle¹  Oliveira, Lilian K. de¹  Dias Filho, Newton Luiz¹  Fraceto, Leonardo F.¹  Universidade Estadual Paulista (UNESP), Araraquara, Brazil¹  Universidade Estadual Paulista (UNESP), Sorocaba, Brazil¹  Rosa, André Henrique¹  Melo, Camila de A.¹ 

关键词: adsorption;    desorption;    humin;    micronutrients;   

DOI  :  10.5935/0103-5053.20130092

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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.

【 授权许可】

Unknown