Authors:
Josy Anteveli Osajima, Kezia Coelho, Lucas Italo Freitas Pinto, Yara Karollyne Abreu,
Fabricia de Castro Silva
, Layane Rodrigues de Almeida
, Edson Cavalcanti da Silva Filho |
Abstract:
The main problems caused by the use of herbicides are environmental contamination and
development of more resistant weeds. Bentazon, which has been traded under the name of
Basagran, is a toxic herbicide, considered an environmentally persistent organic pollutant. This
work aimed to investigate photolysis and heterogeneous photocatalysis of Bentazon herbicide
using TiO2 as a catalyst as well as the influence of salts and oxidants addition. For this purpose,
the herbicide concentration used was of 1.0x10-4mol L-1
. The solutions were exposed to a
maximum of 240 min in an UV radiation chamber under 600-rpm stirring and a temperature of
25.1 C. The samples were analyzed by UV-Vis spectroscopy. Presence of sulfate ions inhibited
the Bentazon degradation process in aqueous solution, while the addition of persulfate ions
favored the degradation process. The herbicide degraded in the presence of hydrogen peroxide
through photolysis at a concentration of 1.0x10-4mol L-1 .
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