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A combined process, demulsification-Fenton oxidation-coagulation, has been employed to treat a sort of high-strength and stable emulsion wastewater produced from a machinery factory. The influences of demulsifier species, dosage of Fenton reagents, oxidation reaction time and pH of coagulation have been investigated. The results indicate that AlCl3 is the most effective demulsifier and the optimal...
Chlorobenzene(CB), one of the persistent organic pollutants (POPs), is a refractory semivolation organic compound and non-biodegradable. Treatment of CB contaminated wastewater by traditional method is essentially impossible. In the study, the sono-photocatalytic degradation of CB was examined in aqueous suspension using the TiO2 as photo catalyst. Some factors affecting the degradation rate of CB...
The decomposition of diethyl phthalate (DEP) has been carried out in UV/H2O2 and UV/TiO2/glass films process separately. The effects of reaction pH, applied H2O2 dose and initial concentration of DEP have been studied. The optimal conditions at an initial DEP concentration of 20 mg.L-1 were acidic and 15mmol.L-1 H2O2 in UV/H2O2 system, and pH3.0 in UV/TiO2/glass films system under 254nm UV irradiation...
In this paper, advanced oxidation process utilizing Fenton's reagent was investigated for degradation of the C.I. Acid Blue 9 from aqueous solution. Some important operation parameters, such as pH value of solutions, iron and hydrogen peroxide concentration, temperature and presence/absence of chloride ion, which effect on the decolorization of the C.I. Acid Blue 9 from aqueous solution by Fenton...
Abstract-Wastewater from cyanidation leaching of gold from ore, coal coking, and electroplating processes contains high concentration of thiocyanate, an anionic toxin of particular concern to aquatic environments. This study investigated potential use of electron beam radiolysis of thiocyanate in aqueous solution. Results showed that in 500 mg/L thiocyanate solution with pH of 7 and 12, as irradiation...
The photodegradation of acetic acid was carried out in the presence of UV/H2O2. The degradation rate was strongly influenced by pH, the intensity of light and initial concentration of acetic acid and H2O2. The effect of anions HCO3-, Cl-, NO3-, SO42- and cations Fe2+, Cu2+, Mn2+ in aqueous solution was also studied . An initial acetic acid concentration of 8 mmol/L was almost completely degraded...
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