Advanced oxidation process (AOPs) prepares one of the important methods to degradation and removal the organic pollutants from aqueous solutions. AOPs method depends on the formation of hydroxyl radicals from hydrogen peroxide with a catalyst. In thi
s work we relied on Fenton reaction to removes the Methylene Blue (MB) using natural magnetite as catalyst. The time for degradation of MB solutions (volume 25ml) in the different concentrations (20, 40, 60, 80) ppm was determined. The maximum degradation of MB in the solution was achieved after 24h with UV irradiation and without any additions, the maximum degradation of MB with UV and in addition of magnetite was achieved after 18h, and with UV + H2O2 the process was took up 3.5h, when adding magnetite + H2O2 and using UV the process of degradation of MB was completed after 2.5 hour. The optimal conditions of the degradation process of MB were: when adding 0.15g magnetite + 0.2ml H2O2 using UV, and that for 25 ml value of MB.
In this work the use of natural magnetite in coast sand of Wadi-kandil area in Syria
in removal of Methylene Blue (MB) from aqueous solution was studied.
The XRD measurements showed that the sample contents the crystalline magnetite
and another co
mpounds. The magnetite in the simple was separated using magnetic
method and the percentage of magnetite in the sample about 70 %.
After separating the magnetite was used to removal the MB from aqueous solution at
different initial concentration of MB (5 , 10 , 20 , 40 , 60 mg/l ) and using different dosage
of magnetite (0.2 , 0.5 , 1 g) at different values of pH and temperature 25° C.
The adsorption of MB increasing by increasing initial concentration of MB and decreasing
by increasing of pH value and the removal of MB was clearly increased when the dosage
of magnetite was increased , the removal values were 47.8% , 84.9% , 88.7% for magnetite
dosage (0.2 , 0.5 , 1 g) respectively at concentration 5 mg/l of MB . While the adsorbed
amount of MB per mass unit of magnetite was decreased because the adsorption sites
weren't saturated.
The Treatment of adsorption data according Lngmuere and Frenglish models showed
that the adsorption process accrued on the energetic homogeneous and heterogeneous sites.
