Plasmacatalytic removal of lead acetate assisted by precipitation.
The Gliding Arc Discharge (GAD) is an efficient non-thermal plasma technique able to degrade organic compounds dispersed in water at atmospheric pressure. The degradation of the organometallic lead acetate (PbAc) in aqueous solution was performed by two distinct plasmageneous processes: GAD and GAD/TiO2. The global oxidation of the organic matter was followed by Chemical Oxygen Demand (COD) and the mineralization was determined by the Total Organic Carbon (TOC). The Pb(2+) ions released during the degradation process were measured by Atomic Absorption Spectroscopy (AAS). For 2h of GAD treatment, the degradation rate of PbAc (10mM) reached 83% and for the same duration of GAD/TiO2 process ([TiO2]=1gL(-1)), it reached 93%. The release of Pb(2+) ions in the solution was respectively of 95% and 57% for GAD and GAD/TiO2 processes. The released Pb(2+) ions were removed by precipitation process in a basic medium at pH=11.1. A reaction mechanism was proposed to explain the PbAc molecule degradation and the Pb(2+) elimination.
Laboratoire des Sciences et Techniques de l'Environnement et de la Valorisation, Faculté des Sciences et de la technologie, Université de Mostaganem, Algeria.
Nabila
N
Haddou
Laboratoire des Sciences et Techniques de l'Environnement et de la Valorisation, Faculté des Sciences et de la technologie, Université de Mostaganem, Algeria; Laboratoire de Génie des Procédés Plasma et traitement de surface, UPMC Université de Paris 06, 11 rue Pierre et Marie Curie 75005, France. Electronic address: m.ghezzar@univ-mosta.dz.
Mouffok Redouane
MR
Ghezzar
Laboratoire des Sciences et Techniques de l'Environnement et de la Valorisation, Faculté des Sciences et de la technologie, Université de Mostaganem, Algeria.
Fatiha
F
Abdelmalek
Laboratoire de Génie des Procédés Plasma et traitement de surface, UPMC Université de Paris 06, 11 rue Pierre et Marie Curie 75005, France.
Stéphanie
S
Ognier
UFR de Chimie, Université de Lille1, France.
Marc
M
Martel
Laboratoire des Sciences et Techniques de l'Environnement et de la Valorisation, Faculté des Sciences et de la technologie, Université de Mostaganem, Algeria.
Ahmed
A
Addou
D000327:Adsorption; D011232:Chemical Precipitation; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009942:Organometallic Compounds / Q000737:chemistry* / Q000302:isolation & purification*; D055668:Photochemical Processes; D058626:Plasma Gases / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D009942:Organometallic Compounds; D058626:Plasma Gases; D014874:Water Pollutants, Chemical; D014867:Water; C009495:titanium dioxide; D014025:Titanium; C008261:lead acetate
Degradation; GAD; GAD/TiO(2); Lead acetate; Pb(2+) precipitation