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 Opportunities: Regular Research Grants
• Start date: October 01, 2010
• End date: September 30, 2012
• Field of knowledge: Physical Sciences and Mathematics - Chemistry
• Principal Investigator: André Henrique Rosa
• Grantee: André Henrique Rosa
• Host Institution: Universidade Estadual Paulista (UNESP). Campus Experimental de Sorocaba. Sorocaba , SP, Brazil
• Associated researchers: Leonardo Fernandes Fraceto

Abstract

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)

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, 2018. (10/11570-4, 10/12210-1)

GOVEIA, DANIELLE; MELO, CAMILA DE A.; DE OLIVEIRA, LILIAN K.; FRACETO, LEONARDO F.; ROCHA, JULIO CESAR; DIAS FILHO, NEWTON LUIZ; ROSA, ANDRE HENRIQUE. Adsorption and release of micronutrients by humin extracted from peat samples. Journal of the Brazilian Chemical Society, v. 24, n. 5, p. 721-730, MAY 2013. (10/12210-1, 10/15768-3, 10/11570-4)

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