Elaboration of new ceramic microfiltration membranes from mineral coal fly ash applied to waste water treatment.
This work aims to develop a new mineral porous tubular membrane based on mineral coal fly ash. Finely ground mineral coal powder was calcinated at 700 degrees C for about 3 h. The elaboration of the mesoporous layer was performed by the slip-casting method using a suspension made of the mixture of fly-ash powder, water and polyvinyl alcohol (PVA). The obtained membrane was submitted to a thermal treatment which consists in drying at room temperature for 24 h then a sintering at 800 degrees C. SEM photographs indicated that the membrane surface was homogeneous and did not present any macrodefects (cracks, etc...). The average pore diameter of the active layer was 0.25 microm and the thickness was around 20 microm. The membrane permeability was 475 l/h m(2) bar. This membrane was applied to the treatment of the dying effluents generated by the washing baths in the textile industry. The performances in term of permeate flux and efficiency were determined and compared to those obtained using a commercial alumina microfiltration membrane. Almost the same stabilised permeate flux was obtained (about 100 l h(-1)m(-2)). The quality of permeate was almost the same with the two membranes: the COD and color removal was 75% and 90% respectively.
Jedidi
Ilyes
I
Laboratoire Sciences des Matériaux et Environnement, Faculté des Sciences de Sfax, Rte. de Soukra Km 4, 3018 Sfax, Tunisia.
Saïdi
Sami
S
Khemakhem
Sabeur
S
Larbot
André
A
Elloumi-Ammar
Najwa
N
Fourati
Amine
A
Charfi
Aboulhassan
A
Salah
Abdelhamid Ben
AB
Amar
Raja Ben
RB
D002244:Carbon / Q000737:chemistry*; D002516:Ceramics; D060729:Coal Ash; D004867:Equipment Design; D005374:Filtration; D008422:Materials Testing; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning / Q000379:methods; D052638:Particulate Matter / Q000737:chemistry*; D010539:Permeability; D011142:Polyvinyl Alcohol / Q000737:chemistry; D016062:Porosity; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D060729:Coal Ash; D008567:Membranes, Artificial; D052638:Particulate Matter; D014874:Water Pollutants, Chemical; D002244:Carbon; D011142:Polyvinyl Alcohol