Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.scitotenv.2016.01.009
Title (Primary) Fluorescence labelling as tool for zeolite particle tracking in nanoremediation approaches
Author Gillies, G.; Mackenzie, K.; Kopinke, F.-D.; Georgi, A.
Journal Science of the Total Environment
Year 2016
Department TUCHEM
Volume 550
Page From 820
Page To 826
Language englisch
Keywords Nanoremediation; Fe-zeolites; Fluorescence labelling; Particle detection; Particle tracking; Ship-in-a-bottle
UFZ wide themes RU3;
Abstract Colloidal Fe-zeolites such as Fe-BEA-35 are currently under study as new adsorbent and catalyst materials for in-situ chemical oxidation with H2O2. As for nanoremediation in general, the availability of suitable particle detection methods is a requirement for successful process development and particle tracing. Detection and distinguishing between natural colloids and introduced particles with a similar composition are a challenge. By means of fluorescence labelling, a highly specific detection option for Fe-BEA-35 was developed. ‘Ship-in-a-bottle’ synthesis of fluorescein within the zeolite pores, which was applied for the first time for a BEA type zeolite, provides a product with stable and non-extractable fluorescence. When the fluorescent labelled zeolite is added at a concentration of 1 wt.% referring to the total zeolite mass, a very low detection limit of 1 mg/L of total zeolite is obtained. Compared to commonly applied turbidity measurements, detection via fluorescence labelling is much more specific and sensitive. Fluorescence is only marginally affected by carboxymethyl cellulose, which is frequently applied as stabilizer in application suspensions but will be depleted upon contact with H2O2. Transport properties of fluorescent labelled and non-labelled Fe-zeolite particles are in agreement as determined in a column study with quartz sand and synthetic groundwater (classified as very hard).
Persistent UFZ Identifier
Gillies, G., Mackenzie, K., Kopinke, F.-D., Georgi, A. (2016):
Fluorescence labelling as tool for zeolite particle tracking in nanoremediation approaches
Sci. Total Environ. 550 , 820 - 826