TY - JOUR

T1 - Treatment of a Trifluraline Effluent by Means of Oxidation-Coagulation with Fe(VI) and Combined Fenton Processes

AU - Martins, Ayrton Figueiredo

AU - Frank, Carla da Silveira

AU - Wilde, Marcelo Luis

PY - 2007/2/8

Y1 - 2007/2/8

N2 - The amination water (AW) effluent stream from the industrial production of the trifluraline herbicide was submitted to an oxidation-coagulation treatment with potassium ferrate, combined with advanced oxidation processes. The experimental results obtained by analysis of variance (ANOVA) for the oxidation-coagulation-Fenton process, evaluating the variables pH (A), Fe(VI) concentration (B), and H2O2 concentration (C), demonstrated that the regression equation resulting from the Response Surface Methodology (RSM) experimental design, for the quadratic model, was ηAbs (%) = 36.9– 21.58A + 8.37A2 + 1.36B + 0.92B2 + 1.08C + 1.52C2 + 1.27AB – 1.34AC + 1.33BC. The maximum absorptiometric color reduction occurred at pH 3, with corresponding maximum amounts of iron and hydrogen peroxide. The absorptiometric color and COD reduction were 96% and 57%, respectively. For the oxidation-coagulation-photo-Fenton process, the analyzed variables were pH (A), Fe(VI) concentration (B), H2O2 concentration (C), and temperature (D). The regression equation resulting from the quadratic model was ηAbs (%) = 38.3 – 20.2A + 8.12A2 – 0.27B + 3.73B2 + 0.3C + 3.6C2 + 1.67D + 3.1D2 + 1.72AB + 0.51AC – 1.82AD + 0.74BC – 1.11BD + 0.03CD. The ANOVA response showed that the highest absorptiometric color reduction occurred at pH 3, with respective maximum amounts of iron and hydrogen peroxide at 60°C. The maximum efficiencies achieved by the proposed treatment process for the trifluraline effluent stream were 95% and 85%, for absorptiometric color and COD reduction, respectively.

AB - The amination water (AW) effluent stream from the industrial production of the trifluraline herbicide was submitted to an oxidation-coagulation treatment with potassium ferrate, combined with advanced oxidation processes. The experimental results obtained by analysis of variance (ANOVA) for the oxidation-coagulation-Fenton process, evaluating the variables pH (A), Fe(VI) concentration (B), and H2O2 concentration (C), demonstrated that the regression equation resulting from the Response Surface Methodology (RSM) experimental design, for the quadratic model, was ηAbs (%) = 36.9– 21.58A + 8.37A2 + 1.36B + 0.92B2 + 1.08C + 1.52C2 + 1.27AB – 1.34AC + 1.33BC. The maximum absorptiometric color reduction occurred at pH 3, with corresponding maximum amounts of iron and hydrogen peroxide. The absorptiometric color and COD reduction were 96% and 57%, respectively. For the oxidation-coagulation-photo-Fenton process, the analyzed variables were pH (A), Fe(VI) concentration (B), H2O2 concentration (C), and temperature (D). The regression equation resulting from the quadratic model was ηAbs (%) = 38.3 – 20.2A + 8.12A2 – 0.27B + 3.73B2 + 0.3C + 3.6C2 + 1.67D + 3.1D2 + 1.72AB + 0.51AC – 1.82AD + 0.74BC – 1.11BD + 0.03CD. The ANOVA response showed that the highest absorptiometric color reduction occurred at pH 3, with respective maximum amounts of iron and hydrogen peroxide at 60°C. The maximum efficiencies achieved by the proposed treatment process for the trifluraline effluent stream were 95% and 85%, for absorptiometric color and COD reduction, respectively.

KW - Chemistry

KW - Coagulation

KW - Fenton

KW - Herbicides

KW - Potassium Ferrate

KW - Response Surface Methodology

KW - Trifluraline Effluent

UR - https://www.mendeley.com/catalogue/e8490ffc-5fe8-3e64-9b18-8ca5341d270a/

U2 - 10.1002/clen.200600017

DO - 10.1002/clen.200600017

M3 - Journal articles

VL - 35

SP - 88

EP - 99

JO - Clean - Soil, Air, Water

JF - Clean - Soil, Air, Water

SN - 1863-0650

IS - 1

ER -