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Chemical reduction of nitrate by zerovalent iron nanoparticles adsorbed radiation-grafted copolymer matrix

Ratnayake, Sanduni Y.; Ratnayake, Anoma K.; Schild, Dieter; Maczka, Edward; Jartych, Elzbieta; Lützenkirchen, Johannes; Kosmulski, Marek; Weerasooriya, Rohan

Abstract:
This research specifi cally focused on the development of a novel methodology to reduce excess nitrate in drinking water utilizing zerovalent iron nanoparticles (nZVI)-stabilized radiation-grafted copolymer matrix. nZVI was synthesized by borohydrate reduction of FeCl3 and stabilized on acrylic acid (AAc)-grafted non-woven polyethylene/polypropylene (NWPE/PP-g-AAc) copolymer matrix, which was grafted using gamma radiation. The use of nZVI for environmental applications is challenging because of the formation of an oxide layer rapidly in the presence of oxygen. Therefore, radiation-grafted NWPE/PP synthetic fabric was used as the functional carrier to anchor nZVI and enhance its spreading and stability. The chemical reduction of nitrate by nZVI-adsorbed NWPE/PP-g-AAc (nZVI-Ads-NWP) fabric was examined in batch experiments at different pH values. At low pH values, the protective layers on nZVI particles can be readily dissolved, exposing the pure iron particles for effi cient chemical reduction of nitrate. After about 24 h, at pH 3, almost 96% of nitrate was degraded, suggesting that this reduction process is an acid-driven, surface-m ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000079351
Veröffentlicht am 16.11.2018
Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 0029-5922, 1508-5791
urn:nbn:de:swb:90-793519
KITopen-ID: 1000079351
HGF-Programm 32.01.04 (POF III, LK 01)
Erschienen in Nukleonika
Band 62
Heft 4
Seiten 269-275
Schlagworte 1-pK Basic Stern Model, acid-driven surface-mediated process, Eley-Rideal like mechanism, priority contaminant, zerovalent iron nanoparticles
Nachgewiesen in Scopus
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