REMOVAL OF TRIBUTYL PHOSPHATE FROM AQUEOUS SOLUTIONS BY TiO2 HETEROGENEOUS PHOTOCATALYSIS SUPPORTED OVER A NEW METAL PLATE WITH KINETIC STUDY

Abstract

The aim of this investigation was to study the degradation of tributyl phosphate (TBP) in aqueous solution by heterogeneous photocatalysis (UV-C/TiO 2). To perform the investigation, aqueous solutions containing the contaminant were exposed to UV radiation in the absence or presence of TiO 2 in suspension or supported on a Fe-Cr metal alloy plate. TBP analyses before and after the treatment were performed by Ultra-Performance Liquid Chromatography (UPLC) in order to quantify the contaminant degradation. The results showed that the TiO 2 photocatalytic system was able to remove TBP from the solution and the formation of some by-products was observed. TiO 2 photocatalytic systems were able to reduce acute toxicity in an Artemia Salina bioassay according to the increase in LC 50 from 10.2 ± 0.5%(v/v) to 16.9 ± 0.6 %(v/v) for the immobilized system and to levels which were not possible to detect by the applied method any more for the suspension system.

Spectral, Structural, Stability Characteristics and Frontier Molecular Orbitals of Tri-N-Butyl Phosphate (Tbp) and Its Degradation Products: DFT Calculations

“…The most important use of TBP is in extracting the hexavalent uranium and the tetravalent plutonium, to form radioactive complexes in the processing of nuclear fuel by the PUREX process (Plutonium Uranium Refining by Extraction) [5][6][7][8][9]. Thus, it is not surprising that TBP and its derivatives have recently been documented as newly emerging pollutants of the environments and, therefore, may pose health hazards for humans and animals [10][11][12]. The TBP has been detected even in indoor dust.…”

New aluminum mesh from recyclable material for immobilization of TiO2 in heterogeneous photocatalysis

“…Kumar et al achieved lower temperatures for anatase‐to‐rutile phase transformation in titania‐tin oxide, additionally avoiding considerable particle growth. Recent research has investigated the enhanced photocatalytic activity of TiO 2 when immobilized over organic‐inorganic sol‐gel, or by doping it with metal supports such as gold nanoparticles, a Fe‐Cr alloy plate, and Ru, Rh, Pd, Ag, Ir, Pt, and Au particles . Materials such as glass, polystyrene, poly methyl methacrylate (Ounas et al), and polyethylene terephthalate films have been used as alternative low‐cost substrates for titania immobilization.…”