Camila Almeida Melo, Lílian Karla de Oliveira, Leonardo Fernandes Fraceto, André Henrique Rosa
Proceedings of the 14th International Peat Congress
adsorption, agricultural, micronutrients, peat, release
Theme IX. Tropical peatlands
Peat is used as adsorbents of metal species and organic fertilizers. The union of these applications makes the use of peat a possible alternative to improve agricultural productivity. This work aimed to evaluate the adsorption capacity of the micronutrients Cu(II), Co(II), Ni(II) and Mn(II) ions in tropical peatlands, and to evaluate the release of previously adsorbed micronutrients. The adsorption results showed the following order of affinity: Cu(II)>Ni(II)>Co(II)>Mn(II), where about 99, 80, 71 and 70% adsorbed micronutrients by the peat samples, respectively. Release experiments showed that the order of release was: Mn(II)>Co(II)>Ni(II)>Cu(II), where about 16, 14, 10 and 1% released micronutrients by peat sample, respectively.