| Full text | |
| Author(s): |
Forini, Mariana M. L.
[1]
;
Antunes, Debora R.
[1]
;
Cavalcante, Luiz A. F.
[1]
;
Pontes, Montcharles S.
[2]
;
Biscalchim, Erica R.
[1]
;
Sanches, Alex O.
[1]
;
Santiago, Etenaldo F.
[2]
;
Fraceto, Leonardo F.
[3]
;
Grillo, Renato
[1]
Total Authors: 9
|
| Affiliation: | [1] Sao Paulo State Univ UNESP, Sch Engn, Dept Phys & Chem, BR-15385000 Ilha Solteira, SP - Brazil
[2] Mato Grosso do Sul State Univ UEMS, Ctr Nat Resources Studies CERNA, Nat Resources Program, BR-79804970 Dourados, MS - Brazil
[3] Sao Paulo State Univ UNESP, Inst Sci & Technol ICTS, Dept Environm Engn, BR-18087180 Sorocaba, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Journal of Agricultural and Food Chemistry; v. 68, n. 40, p. 11105-11113, OCT 7 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
The use of nano- and microparticles as a release system for agrochemicals has been increasing in agricultural sector. However, the production of eco-friendly and smart carriers that can be easily handled in the environment is still a challenge for this technology. In this context, we have developed a biodegradable release system for the herbicide atrazine with magnetic properties. Herein, we investigated the (a) physicochemical properties of the atrazine-loaded magnetic poly(e-caprolactone) microparticles (MPs:ATZ), (b) in vitro release kinetic profile of the herbicide, and (c) phytotoxicity toward photosynthesis in the aquatic fern Azolla caroliniana. The encapsulation efficiency of the herbicide in the MPs:ATZ was ca. 69%, yielding spherical microparticles with a diameter of ca. 100 mu m, a sustained-release profile, and easily manipulated with an external magnetic field. Also, phytotoxicity issues showed that the MPs:ATZ maintained their herbicidal activity via inhibition of PSII, showing lower toxicity compared with the nonencapsulated ATZ at 0.01 and 0.02 mu mol.L-1. Therefore, this technology may conveniently promote a novel magnetic controlled release of the herbicide ATZ (with the potential to be collected from a watercourse) and act as a nutrient boost to the nontarget plant, with good herbicidal activity and reduced risk to the environment. (AU) | |
| FAPESP's process: | 17/21004-5 - Agriculture, micro/nanotechnology and environment: from evaluation of the mechanisms of action to studies of transport and toxicity |
| Grantee: | Leonardo Fernandes Fraceto |
| Support type: | Research Projects - Thematic Grants |