TY - JOUR
T1 - Relevance of adjuvants and additives of pesticide commercial formulation on the removal performance of glyphosate by electrochemically driven processes
AU - Lima, Nayara Silva
AU - Souza, Éverton Marinheiro
AU - Torres, Nádia Hortense
AU - Bergamasco, Rosângela
AU - Marques, Maria Nogueira
AU - GARCIA SEGURA, Sergio
AU - Sanchez de Alsina, Odélsia Leonor
AU - Cavalcanti, Eliane Bezerra
N1 - Funding Information:
This work was financed by FINEP (Financier of Studies and Projects) under project Nº 01.14.0021.00 . The authors would like to acknowledge also the scholarships granted by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Nº 550036/2014-8 and from Fundação de Apoio à Pesquisa e à Inovação Tecnológica do Estado de Sergipe (FAPITEC/SE) Nº 03/2014 . N.H. Torres acknowledges the support from her fellowship ( CAPES - PNPD - 27002012001P9 ).
Funding Information:
This work was financed by FINEP (Financier of Studies and Projects) under project Nº 01.14.0021.00. The authors would like to acknowledge also the scholarships granted by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Nº 550036/2014-8 and from Fundação de Apoio à Pesquisa e à Inovação Tecnológica do Estado de Sergipe (FAPITEC/SE) Nº 03/2014. N.H. Torres acknowledges the support from her fellowship (CAPES - PNPD - 27002012001P9).
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/3/1
Y1 - 2019/3/1
N2 - Glyphosate is a broad-spectrum systemic herbicide widely used in crops. Contamination of groundwater and superficial water sources by glyphosate may suppose an environmental risk due to its chronic toxicity. In this frame, development of water treatment technologies to remove glyphosate is of high relevance. The objective of this work was to evaluate capabilities of electrochemical oxidation (ECO) as emergent environmental friendly technology. The effect of variation of current density (j), pH and initial concentration of supporting electrolyte was studied when employing DSA® expanded anodes of Ti/Ru0.36Ti0.64O2. Special attention was given to the influence of pH due to the characteristic speciation of glyphosate that may influence ECO performance. Almost complete mineralization (>90%) of pure glyphosate was attained after 3 h of ECO treatment with 0.15 M NaCl at 40 mA cm−2 and pH 3.0. Meanwhile, solely 60% of mineralization was achieved under identical conditions when treating commercial glyphosate pesticide products. Degradation by-products and yielded ionic species were identified by chromatography and chromatography mass spectrometry. A reaction sequence for glyphosate ECO mineralization was proposed.
AB - Glyphosate is a broad-spectrum systemic herbicide widely used in crops. Contamination of groundwater and superficial water sources by glyphosate may suppose an environmental risk due to its chronic toxicity. In this frame, development of water treatment technologies to remove glyphosate is of high relevance. The objective of this work was to evaluate capabilities of electrochemical oxidation (ECO) as emergent environmental friendly technology. The effect of variation of current density (j), pH and initial concentration of supporting electrolyte was studied when employing DSA® expanded anodes of Ti/Ru0.36Ti0.64O2. Special attention was given to the influence of pH due to the characteristic speciation of glyphosate that may influence ECO performance. Almost complete mineralization (>90%) of pure glyphosate was attained after 3 h of ECO treatment with 0.15 M NaCl at 40 mA cm−2 and pH 3.0. Meanwhile, solely 60% of mineralization was achieved under identical conditions when treating commercial glyphosate pesticide products. Degradation by-products and yielded ionic species were identified by chromatography and chromatography mass spectrometry. A reaction sequence for glyphosate ECO mineralization was proposed.
KW - Electrochemical advanced oxidation processes
KW - Herbicide
KW - Mineralization
KW - Persistent organic pollutants
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U2 - 10.1016/j.jclepro.2018.12.007
DO - 10.1016/j.jclepro.2018.12.007
M3 - Article
AN - SCOPUS:85059311357
SN - 0959-6526
VL - 212
SP - 837
EP - 846
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
ER -