Novel Electrochemical Treatment of Spent Caustic from the Hydrocarbon Industry Using Ti/BDD

Figure 6

Electrochemical characterization of Ti/BDD by cyclic voltammetric analysis using (a₁) 0.05 M NaOH/HCl (pH 1) and (a₂) 0.05 M NaOH/H₂SO₄ (pH 1). (b) ^•OHs analysis by fluorescence spectroscopy using (b₁) 0.05 M NaOH/HCl (pH 1) and (b₂) 0.05 M NaOH/H₂SO₄ (pH 1). (c) Selection of the current density using synthetic solutions of phenol (30 mg L⁻¹ of TOC) in 0.05 NaOH/H₂SO₄ (pH 1).

(a)

(b)

(c)