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Supplementary Material for:

Assessing the performance of electrochemical oxidation using DSA®

and BDD anodes in the presence of UVC light

Isaac Sánchez-Montes1, José F. Pérez2, Cristina Sáez2, Manuel A. Rodrigo2,*, Pablo

Cañizares2, and José M. Aquino1,*

1Universidade Federal de São Carlos, Departamento de Química, 13565-905 São Carlos

– SP, Brasil2Chemical Engineering Department, University of Castilla-La Mancha, Edificio Enrique

Costa Novella, Campus Universitario s/n, 13005 Ciudad Real, Spain

* Corresponding authors.

E-mail addresses: jmaquino@ufscar.br (José M. Aquino)

manuel.rodrigo@uclm.es (Manuel A. Rodrigo)

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Fig. SM-1 Absorbance of the ClO– species at 293 nm as a function of the OCl–

concentration ([ClO–]). The obtained parameters resulting from the linear fitting can be

seen in the inset of this figure.

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Fig. SM-2 ClO– concentration ([ClO–]) evolution as a function of the electrolysis time

(t) using a DSA® and BDD anodes and a 9 W UVC lamp during the coupled photo-

electrochemical process (P-EC) in the absence of glyphosate. Conditions: the

electrochemical (EC) method was carried out using 100 mA cm-2, [NaCl] = 2 g L-1, Vs =

1.5 L, pH = 4-5, and θ = 25 °C. For more details, see the inset of this figure.

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a)

b)

Fig SM-3 Concentration evolution of the chlorine species as a function of electrolysis

time for the electrochemical (EC) process using a a) DSA® and b) BDD anode in the

absence of glyphosate. Conditions: the EC method was carried out using 100 mA cm-2,

[NaCl] = 2 g L-1, Vs = 1.5 L, pH = 4-5, and θ = 25 °C. For more details, see the inset of

this figure.

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a)

b)

Fig. SM-4 Concentration evolution of a) NO3– and b) PO4

3– ions as a function of

treatment time (t) for the coupled photo-electrochemical (P-EC) process using a BDD

electrode. Conditions: [NaCl] = 2 g L–1, [glyphosate] = 50 mg L–1, Vs = 1.5 L, pH = 4-5,

θ = 25 °C, and using a 9 W UVC lamp. The P-EC and EC methods were carried out

using 10 mA cm–2. For more details, see the inset of this figure.

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Fig. SM-5 Concentration evolution of the main detected carboxylic acids as a function

of treatment time (t) for the photo-electrochemical (P-EC) process using a BDD

electrode. Conditions: [NaCl] = 2 g L–1, [glyphosate] = 50 mg L–1, Vs = 1.5 L, pH = 4-5,

θ = 25 °C, and using a 9 W UVC lamp. The P-EC method was carried out using 10 mA

cm–2. For more details, see the inset of this figure.