Decomposition of atrazine traces in water by combination of non-thermal electrical discharge and adsorption on nanofiber membrane

WATER RESEARCH

卷:72

Article

Vanraes, Patrick¹  Willems, Gert¹  Daels, Nele^2,3  Van Hulle, Stijn W. H.³  De Clerck, Karen²  Surmont, Pieter⁴  Lynen, Frederic⁴  Vandamme, Jeroen⁵  Van Durme, Jim⁵  Nikiforov, Anton^1,6  Leys, Christophe¹ 

[1] Univ Ghent, Dept Appl Phys, B-9000 Ghent, Belgium

[2] Univ Ghent, Dept Text, B-9052 Zwijnaarde, Belgium

[3] Univ Ghent, Dept Ind Biol Sci, B-8500 Kortrijk, Belgium

[4] Univ Ghent, Separat Sci Grp, Dept Organ Chem, B-9000 Ghent, Belgium

[5] Katholieke Univ Leuven, Res Grp Mol Odor Chem, Dept Microbial & Mol Syst M2S, B-9000 Ghent, Belgium

[6] Inst Solut Chem RAS, Ivanovo 153012, Russia

关键词: Dielectric barrier discharge;    Wastewater treatment;    Advanced oxidation processes;    Peroxone;    Energy efficiency;    Degradation by-products;   

DOI  :  10.1016/j.watres.2014.11.009

来源: Elsevier

【 摘 要 】

In recent decades, several types of persistent substances are detected in the aquatic environment at very low concentrations. Unfortunately, conventional water treatment processes are not able to remove these micropollutants. As such, advanced treatment methods are required to meet both current and anticipated maximally allowed concentrations. Plasma discharge in contact with water is a promising new technology, since it produces a wide spectrum of oxidizing species. In this study, a new type of reactor is tested, in which decomposition by atmospheric pulsed direct barrier discharge (pDBD) plasma is combined with micropollutant adsorption on a nanofiber polyamide membrane. Atrazine is chosen as model micropollutant with an initial concentration of 30 mu g/L. While the H2O2 and O-3 production in the reactor is not influenced by the presence of the membrane, there is a significant increase in atrazine decomposition when the membrane is added. With membrane, 85% atrazine removal can be obtained in comparison to only 61% removal without membrane, at the same experimental parameters. The by-products of atrazine decomposition identified by HPLC-MS are deethylatrazine and ammelide. Formation of these by-products is more pronounced when the membrane is added. These results indicate the synergetic effect of plasma discharge and pollutant adsorption, which is attractive for future applications of water treatment. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free