permeable reactive barriers made with zvi-doped porous...
TRANSCRIPT
Permeable reactive barriers made with ZVI-doped porous plaster
for the treatementof organic nitro compounds
on laboratory scale
Saliha Boudia, Marina Fiallo, Patrick Sharrock
Tizi-Ouzou
Castres
Université Mouloud Mammeri Université Toulouse 3 Paul Sabatier
Source: http://grida3.crs4.it/grida3/doku.php?id=activity:prb-zvi
Permeable Reactive Barrier
USE OF PRB
Remediation of groundwater
ImmobilizationTransformation (chemical reduction)
Evaluating possibilities for flow bypassdue to reduced porosity
Pump and TreatMethods
Scrap ironand wood
Trench excavation
Zero Iron Valent
Anaerobic corrosionFe0 + 2H2O Fe2+ + H2 + 2OH-
Aerobic corrosion2Fe0 +O2 + 2H2O 2Fe2+ + 4OH-
Interstate Technology and Regulatory Council USA
Bechamp reduction (1854)
60-100°C
p-nitroaniline phenylenediamine
(plaster of paris, gypsum)
CaSO4 x 0.5 H2O CaSO4 x 2H20
Why plaster
wood ash
sheep wool
straw of hemp
PLASTER cylinder (50 g)
POROUS PLASTER = CaCO3 + H3O+
Plaster/water 50/35 (w:w)
POROUS PLASTER + ZVI
+ ZVI
+ charcoal
plaster
Treatement of an aqueous solution of p-nitroanilina
column
Recovery of phenylenediamine
flow
0.24 ml/min
0.40 ml/min
0.15 ml/min
Carcassonne
Salsigne