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Designing and characterization of solid modifications of agrochemical ingredients herbicides with lower environmental impact

Grant number: 16/09198-6
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): February 01, 2017
Effective date (End): December 10, 2017
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Cauê Ribeiro de Oliveira
Grantee:Paulo de Sousa Carvalho Júnior
Host Institution: Embrapa Instrumentação Agropecuária. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA). Ministério da Agricultura, Pecuária e Abastecimento (Brasil). São Carlos , SP, Brazil


Agrochemicals (pesticides, herbicides and insecticides, among others) of high efficiency and minimal environmental impacts are widely demanded in agricultural practices. Among the application factors of these compounds, solubility is one of most important, because it determines the availability of these compounds to the performance targets (pests). However, although the marketed formulations available are, in general, soluble systems, this feature is also a limiting: since the compound is applied, degradation, leaching and drift processes occur simultaneously - limiting the effective application of reduced amount and causes environmental problems, due to the excessive application. Therefore, it is desirable that these compounds could be conveyed in forms of controlled solubility, thus allowing for the application to such slurries (not solutions) well known properties of crystals. In herbicides, this application proposal would have the advantage of increasing the action of the compound remaining time, thus eliminating seedlings yet emerged at the moment of application. Thus, the development of new solid forms of herbicides, is an attractive proposition for manufacture of more efficient components and improved properties. Here, It is proposed the development of crystalline modifications routes of herbicides consolidated in agricultural applications, in order to establish a model for this area. The Glyphosate , Picloram, Atrazine, Dicamba, Metsulfurom-methyl (selected for its relevance in the agricultural application) will be subject to crystallization screenings ranging solvents and co-crystallization agents, as well as temperature and pressure conditions. To design and characterizes physicochemical properties, X-ray diffraction, Vibrational Spectroscopy, thermal analysis, solubility and biodegradability measurements will be employed. (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)
CARVALHO JR, PAULO DE S.; DINIZ, LUAN F.; DA SILVA, GELSON T. S. T.; COUTINHO, NAYARA DANTAS; DOS SANTOS, PRISCILA GOMES; CARVALHO-SILVA, VALTER HENRIQUE; RIBEIRO, CAUE; ELLENA, JAVIER. Amino-Imino Tautomerism in the Salt Formation of Albendazole: Hydrobromide and Nitrate Salts. Crystal Growth & Design, v. 21, n. 2, p. 1122-1135, . (16/09198-6, 12/05616-7)
CARVALHO JR, PAULO S.; GUIMARAES, GETTON G. F.; DINIZ, LUAN F.; ELLENA, JAVIER; RIBEIRO, CAUE. Highly water soluble agrichemicals by using engineered organic salts for reducing adverse environmental impacts. GREEN CHEMISTRY, v. 21, n. 23, p. 6419-6429, . (16/09198-6, 16/10636-8, 15/25694-0)
DA SILVA, AMANDHA KAISER; DINIZ, LUAN F.; TENORIO, JUAN C.; NAZARIO, CARLOS E. D.; RIBEIRO, CAUE; CARVALHO JR, PAULO S.. Driving a sustainable application of s-triazine ametryn and atrazine herbicides through multicomponent crystals with improved solubility. CrystEngComm, v. 23, n. 24, p. 4252-4263, . (16/09198-6)

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