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Development of polymeric spheres containing humic substances/peat: a new system for modified release of macro and micronutrients for soils

Grant number: 10/11570-4
Support type:Regular Research Grants
Duration: October 01, 2010 - September 30, 2012
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal researcher:André Henrique Rosa
Grantee:André Henrique Rosa
Home Institution: Universidade Estadual Paulista (UNESP). Campus Experimental de Sorocaba. Sorocaba , SP, Brazil
Assoc. researchers:Leonardo Fernandes Fraceto


Studies have reported that the environmental applications, technological and medicinal peat, would be associated to the high content of humic substances (HS) present in its constitution, which influence and enable their use in various areas such as water treatment and effluent , monitoring of environmental pollution, production of fuels, medicines, soil management, etc. .. Besides these effects, the structural characteristics and physicochemical properties of peat and SH, enable them to be studied in order to slow release of nutrients in soil for plants. Thus, this project aims to develop a new system using peat / humic substances (HS) for slow release of macro (phosphorus, nitrogen, potassium, calcium and magnesium) and/or micronutrients (boron, copper, chloride, iron, manganese, molybdenum, nickel and zinc) in soils. The main advantages of the system are: low cost of preparing the system, reducing wastage of nutrients released to the soil and minimize the possibility of leaching of nutrients to aquatic systems, resulting in the contamination of surface waters. Moreover, the system peat/SH-macromicronutrientes to be developed have the advantage of also enter the soil organic matter in the form of HS, contributing to the increase of permeability, cation exchange, water retention and heat favoring the germination of seeds and thereby increasing agricultural productivity. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MELO, CAMILA ALMEIDA; DE OLIVEIRA, LILIAN KARLA; FRACETO, LEONARDO FERNANDES; ROSA, ANDRE HENRIQUE. Biosorption of macronutrients by Brazilian tropical peats. Communications in Soil Science and Plant Analysis, v. 49, n. 12, p. 1530-1539, . (10/11570-4, 10/12210-1)

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Filed patent(s) as a result of this research project

COMPOSTOS POLIMÉRICOS CONTENDO TURFAS E SUBSTÂNCIAS HÚMICAS, PROCESSO PARA O PREPARO DOS MESMOS E SEU USO BR1020140028978 - Universidade Estadual Paulista (UNESP) . André Henrique Rosa; Camila de Almeida Melo; Leonardo Fernandes Fraceto - February 2014, 06