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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

要旨

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.

材料

製品番号

ブランド

製品内容

Sigma-Aldrich

過酸化水素溶液, contains ~200 ppm acetanilide as stabilizer, 3 wt. % in H₂O

Sigma-Aldrich

Carbonyl iron, ≥97% Fe basis

Sigma-Aldrich

鉄, puriss. p.a., carbonyl-Iron powder, low in magnesium and manganese compounds, ≥99.5% (RT)

Sigma-Aldrich

鉄, granular, 10-40 mesh, >99.99% trace metals basis

Millipore

過酸化水素溶液, 3%, suitable for microbiology

Sigma-Aldrich

過酸化水素溶液, JIS special grade, 30.0-35.5%

Sigma-Aldrich

過酸化水素溶液, SAJ first grade, ≥30.0%

Sigma-Aldrich

スルファメタジン, 99.0-101.0% (on dried basis)

Sigma-Aldrich

鉄, foil, thickness 0.1 mm, ≥99.9% trace metals basis

Sigma-Aldrich

鉄, chips, 99.98% trace metals basis

Sigma-Aldrich

鉄, wire, diam. 1.0 mm, ≥99.9% trace metals basis

鉄, foil, 100x100mm, thickness 0.25mm, hard, 99.5%

Sigma-Aldrich

鉄, foil, thickness 0.25 mm, ≥99.99% trace metals basis

Supelco

スルファメタジン, VETRANAL^®, analytical standard

鉄, foil, 300x300mm, thickness 0.1mm, hard, 99.5%

鉄, foil, 100x100mm, thickness 0.125mm, as rolled, 99.99+%

鉄, rod, 200mm, diameter 25mm, as drawn, 98+%

鉄, tube, 200mm, outside diameter 8.0mm, inside diameter 5mm, wall thickness 1.5mm, annealed, 99.5%

鉄, rod, 100mm, diameter 100mm, as drawn, armcO« soft ingot 99.8%

鉄, foil, 100x100mm, thickness 1.0mm, as rolled, 99.5%

鉄, rod, 50mm, diameter 5.0mm, as drawn, 99.99+%

鉄, foil, 100x100mm, thickness 0.5mm, hard, 99.5%

鉄, foil, 150x150mm, thickness 1.5mm, as rolled, 99.5%

鉄, rod, 150mm, diameter 6.0mm, as drawn, 99.99+%

鉄, rod, 100mm, diameter 2.0mm, as drawn, 99.95%

鉄, foil, 25x25mm, thickness 0.9mm, as rolled, 99.5%

鉄, tube, 200mm, outside diameter 5.0mm, inside diameter 4.5mm, wall thickness 0.25mm, as drawn, 99.5%

鉄, foil, 25x25mm, thickness 1.0mm, as rolled, 99.5%

鉄, foil, 50x50mm, thickness 0.1mm, hard, 99.5%

鉄, rod, 200mm, diameter 9.5mm, as drawn, soft ingot 99.8+%