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  • Degradation of sulphamethazine by means of an improved photo-Fenton process involving a hydrogen peroxide systematic dosage.

Degradation of sulphamethazine by means of an improved photo-Fenton process involving a hydrogen peroxide systematic dosage.

Environmental technology (2014-06-25)
Evelyn Yamal-Turbay, Lydia Pérez González, Moisès Graells, Montserrat Pérez-Moya
PMID24956760
ABSTRACT

Despite being acknowledged as an emerging contaminant, sulphamethazine (SMT) degradation has received scarce attention in the advanced oxidation processes field. Thus, this work addresses the degradation of SMT in water solutions (12 L of 25mgL-1 samples) by means of a photo-Fenton process and a systematic H202 dosage protocol that enhances its performance. A conventional photo-Fenton process led to 86% mineralization after 120 min treatment when adding the Fenton reactants at once (initial concentrations were 10mgL-1 Fe(II) and 200mgL-1 H2O2). Conversely, the process achieved the total mineralization of the samples in less than 75 min when the same amount of H202 was continuously dosed according to a conveniently tuned dosage protocol. In both cases, total SMT degradation was achieved within 10 min. Hence, this work's aim is to determine the efficient dosage conditions of H2O2. The results show that a significant improvement of the photo-Fenton mineralization of SMT solutions is possible by adjusting the dosage of H2O2.

MATERIALS
Product Number
Brand
Product Description
IRMM524B
Iron, IRMM®, certified reference material, 0.5 mm wire
46802
Supelco
Sulfamethazine, VETRANAL®, analytical standard
S6256
Sigma-Aldrich
Sulfamethazine, 99.0-101.0% (on dried basis)
356808
Sigma-Aldrich
Iron, foil, thickness 0.1 mm, ≥99.9% trace metals basis
88597
Millipore
Hydrogen peroxide solution, 3%, suitable for microbiology
44890
Sigma-Aldrich
Iron, puriss. p.a., carbonyl-Iron powder, low in magnesium and manganese compounds, ≥99.5% (RT)
95294
Sigma-Aldrich
Hydrogen peroxide solution, tested according to Ph. Eur.
209309
Sigma-Aldrich
Iron, powder, −325 mesh, 97%
267945
Sigma-Aldrich
Iron, chips, 99.98% trace metals basis
95321
Supelco
Hydrogen peroxide solution, ≥30%, for trace analysis
18304
Sigma-Aldrich
Hydrogen peroxide solution, 34.5-36.5%
GF74630864
Iron, foil, light tested, 50x50mm, thickness 0.05mm, hard, 99.5%
GF31022862
Iron, foil, not light tested, 25x25mm, thickness 0.009mm, 99.85%
GF42948771
Iron, foil, light tested, 100x100mm, thickness 0.025mm, as rolled, 99.99+%
GF37828907
Iron, foil, 8mm disks, thickness 0.05mm, as rolled, 99.99+%
GF99898968
Iron, foil, 8mm disks, thickness 0.20mm, hard, 99.5%
GF61432523
Iron, foil, not light tested, 25x25mm, thickness 0.002mm, 99.85%
GF48738370
Iron, foil, 8mm disks, thickness 0.38mm, hard, 99.5%
GF08124544
Iron, foil, not light tested, 300x300mm, thickness 0.05mm, hard, 99.5%
GF26822156
Iron, foil, light tested, 25x25mm, thickness 0.025mm, hard, 99.5%
GF15942618
Iron, foil, light tested, 25x25mm, thickness 0.05mm, as rolled, 99.99+%
GF66169020
Iron, foil, not light tested, 50x50mm, thickness 0.001mm, 99.85%
GF60216780
Iron, foil, not light tested, 100x100mm, thickness 0.006mm, 99.85%
GF65000573
Iron, foil, not light tested, 150x150mm, thickness 0.008mm, 99.85%
GF74327722
Iron, foil, 20m coil, thickness 0.038mm, hard, 99.5%
GF56837649
Iron, foil, 10mm disks, thickness 0.125mm, hard, 99.5%
GF31904805
Iron, foil, 15mm disks, thickness 0.0125mm, 99.85%
GF47914612
Iron, foil, 1m coil, thickness 0.075mm, hard, 99.5%
GF13082385
Iron, foil, 1m coil, thickness 0.5mm, hard, 99.5%
GF92297302
Iron, foil, 10mm disks, thickness 0.38mm, hard, 99.5%