Remoção do herbicida 2,4-D por meio do tratamento convencional da água e adsorção em carvão ativado granular em instalação piloto
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Data
2014-07-01
Autores
Brega, Renata Santos
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Universidade Federal do Espírito Santo
Resumo
The population growth pushes agricultural production towards intensive use of pesticides that increase productivity. However, incorrect use can result in serious problem at water treatment plants and negatively impact in public health. According to laboratory-scale studies, conventional treatment, one of the most used in Brazil, presents negligible removal of 2,4-D. The activated carbon adsorption have been documented to be effective for the removal of various contaminants, including pesticides. Thus, it was evaluated the removal of the herbicides 2,4-D and 2,4,5 -T and metabolite 2,4- DCP using the conventional treatment and granular activated carbon adsorption, in a pilot-plant. The granular activated carbon used was manufactured from coconut shell. The herbicides concentration was analyzed by High Performance Liquid Chromatography with diode array detection and solid phase extraction. The combination of conventional treatment and granular activated carbon adsorption showed high removal of 2,4-D (99%) reaching final concentrations below the limit of Portaria MS n° 2914/2011. Conventional treatment, however, also showed considerable removal of 2,4- D (35-59%), with a high percentage removal obtained in sedimentation (30-52%), suggesting that there were interaction between natural organic matter and 2,4-D, increasing the removal in this step. 2,4-DCP and 2,4,5-T showed concentrations below the detection limit.
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Adsorption , Pesticides , Activated carbon , Activated carbon , Agrotóxico , Tratamento de água
Citação
BREGA, Renata Santos. Remoção do herbicida 2,4-D por meio do tratamento convencional da água e adsorção em carvão ativado granular em instalação piloto. 2014. 139 f. Dissertação (Mestrado em Engenharia Ambiental) - Universidade Federal do Espírito Santo, Centro Tecnológico, Vitória, 2014.