Caractérisation physico-chimique des eaux usées d’abattoir en vue de la mise en oeuvre d’un traitement adéquat : cas de Kénitra au Maroc

Removal of methylene blue dye from aqueous solution using a superabsorbant hydrogel the polyacrylamide: isotherms and kinetic studies

“…The influence of the pH on the adsorption of the MB by the PAAM was studied to gain further insight into the adsorption process and that using different solution with different pH values for 540 min and the same initial concentration (10 ppm) keeping constant the mass of adsorbent, the stirring speed and room temperature ( Figure 4). The results indicate that at low values of pH (pH<2) there is no adsorption because There is competition between MB + and the protons to be fixed to PAAM surface, then the dye removal efficiency increases significantly with the increasing pH value from 2 to 5, and then slightly increases when the pH value increased from 5 to 8 reaching its maximum (92%) and that agreed with to the marge of pH of wastewater 24,25 . Further increase in the pH value results in a significant decrease in dye removal efficiency.…”

Treatment test of oil mill effluents by a Pistia stratiotes L., 1753 (water lettuce) pond based system, in Maroua (Far-North, Cameroon)

“…The abatement rates obtained were, respectively, 26 and 27% for microphytes and macrophytes ( Figure 5). Less than 5 or greater than 8.5, pH directly afflicts purifier organisms growth (Belghyti et al, 2009). The pH values thus obtained are acceptable to the growth of microorganisms and water lettuce, which require, generally, a pH range of 5.5 to 7.5 (Belghyti et al, 2009 Figure 3A).…”

Flux des polluants liés aux activités anthropiques, risques sur les ressources en eau de surface et la chaine trophique à travers le monde : synthèse bibliographique

“…Cette exploitation de l'or contribue à la pollution de l'eau par le mercure et le cyanure conduisant ainsi à la pollution de l'eau et du sol avec des risques sanitaires (Bhattacharya et al, 2012). En dehors de la pollution des eaux par l'utilisation des goudrons pour les revêtements routiers, par l'exploitation de l'or et autres gisements de mines (diamant, bauxite, rutile etc), il existe l'exploitation du pétrole par les industries pétrolières (Omo -Irabor et al, 2008) (Belghyti, 2009).…”