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

Water Research
Tom HennebelWilly Verstraete

Abstract

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 20mg L(-1) diatrizoate by a 10mg L(-1) Pd suspension was completed after 4h 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+/-0.4h(-1) L g(-1) Pd) was obtained with a casting solution of 10% PSf and 500mg L(-1) Pd. Subsequently, water containing 20mg 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 48h was obtained. This work showed that membrane contactors ...Continue Reading

Citations

Feb 13, 2016·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Hunmoon HaChang-Gyun Kim
Oct 31, 2012·Colloids and Surfaces. B, Biointerfaces·Simon De CorteRikke Louise Meyer
Aug 21, 2014·Environmental Science & Technology·Maria RedekerThomas A Ternes
May 11, 2011·Microbial Biotechnology·Simon De CorteNico Boon
Jun 14, 2014·Acta Biomaterialia·Adam SchröfelLeslie M Shor
Sep 1, 2011·Environmental Science & Technology·Simon De CorteNico Boon
Jun 15, 2011·Environmental Science & Technology·Bart De GussemeNico Boon
Oct 12, 2013·Journal of Separation Science·Silvia EcheverríaEva Pocurull
Sep 8, 2018·Frontiers in Microbiology·Xiangchun QuanJinbo Zhao
Nov 5, 2021·Environmental Science and Pollution Research International·Zhiling DuYongjun Zhang

❮ Previous
Next ❯

Related Concepts

Related Feeds

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.