Removal of diatrizoate with catalytically active membranes incorporating microbially produced palladium nanoparticles

WATER RESEARCH

卷:44

Article

Hennebel, Tom¹  De Corte, Simon¹  Vanhaecke, Lynn²  Vanherck, Katrien³  Forrez, Ilse¹  De Gusseme, Bart¹  Verhagen, Pieter^1,4  Verbeken, Kim⁵  Van der Bruggen, Bart⁶  Vankelecom, Ivo³  Boon, Nico¹  Verstraete, Willy¹ 

[1] Univ Ghent, Lab Microbial Ecol & Technol LabMET, B-9000 Ghent, Belgium

[2] Univ Ghent, Chem Anal Lab, B-9820 Merelbeke, Belgium

[3] Univ Louvain, Ctr Surface Chem & Catalysis CFN, B-3001 Louvain, Belgium

[4] Univ Coll Ghent, Lab Environm Technol, B-9000 Ghent, Belgium

[5] Univ Ghent, Dept Mat Sci & Engn, B-9052 Ghent, Belgium

[6] Univ Louvain, Lab Appl Phys Chem & Environm Technol, B-3001 Louvain, Belgium

关键词: Biogenic metals;    Emerging contaminants;    Dehalogenation;    Microbial;   

DOI  :  10.1016/j.watres.2009.10.041

来源: Elsevier

【 摘 要 】

There is an increasing concern about the fate of iodinated contrast media (ICM) in the environment. Limited removal efficiencies of currently applied techniques such as advanced oxidation processes require more performant strategies. The aim of this study was to establish an innovative degradation process for diatrizoate, a highly recalcitrant ICM, by using biogenic Pd nanoparticles as free suspension or immobilized in polyvinylidene fluoride (PVDF) and polysulfone (PSf) membranes. As measured by HPLC-UV, the removal of 20 mg L-1 diatrizoate by a 10 mg L-1 Pd suspension was completed after 4 h at a pH of 10. LC-MS analysis provided evidence for the sequential hydrodeiodination of diatrizoate. Pd did not lose its activity after incorporation in the PVDF and PSf matrix and the highest activity (k(cat) = 30.0 +/- 0.4 h(-1) L g(-1) Pd) was obtained with a casting solution of 10% PSf and 500 mg L-1 Pd. Subsequently, water containing 20 mg L-1 diatrizoate was treated in a membrane contactor, in which the water was supplied at one side of the membrane while hydrogen was provided at the other side. In a fed batch configuration, a removal efficiency of 77% after a time period of 48 h was obtained. This work showed that membrane contactors with encapsulated biogenic nanoparticles can be instrumental for treatment of water contaminated with diatrizoate. (C) 2009 Elsevier Ltd. All rights reserved.

【 授权许可】

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