Usman, Muhammad
[VerfasserIn];
Waseem, Muhammad
[VerfasserIn];
Mani, Nithish
[VerfasserIn];
Andiego, George
[VerfasserIn]
;
Technische Universität Hamburg,
Technische Universität Hamburg Institut für Wasserressourcen und Wasserversorgung
Optimization of soil aquifer treatment by chemical oxidation with hydrogen peroxide addition
Anmerkungen:
Sonstige Körperschaft: Technische Universität Hamburg
Sonstige Körperschaft: Technische Universität Hamburg, Institut für Wasserressourcen und Wasserversorgung
Beschreibung:
Trace organic compounds (TrOCs), mostly found in secondary effluents have a potential impact on the environment including surface water, groundwater and especially aquatic ecosystems. This study focuses on the oxidation of five selected TrOCs in column experiments simulating soil aquifer treatment (SAT) integrated with Fenton-like reaction using granular ferric hydroxide (GFH) as a catalyst. In order to determine the effectiveness of removing TrOCs by water through this approach, experiments were carried out with ultrapure water containing different target compounds at pH 6 using different dosages of hydrogen peroxide and catalyst. In this study, the optimal concentration of hydrogen peroxide for the removal of TrOCs was found to be 200 mg/L. However, the observed overall removal was low for each target compound. Moreover, little increase in the chemical oxidation of micropollutants was observed by increasing the dosage of the catalyst. For an optimum concentration of hydrogen peroxide the removal of 33, 34, 28, 29 and 35% were observed for benzotriazole, carbamazepine, phenytoin, primidone and meprobamate, respectively in 5h with a hydraulic retention time of 3h, respectively. Therefore, this treatment scheme might not be a promising option for the oxidation of secondary effluents. Thus, other treatment options, such as decrease of pH, recirculation of effluent through columns to increase the hydraulic retention times, other types of catalyst and higher dosage of hydrogen peroxide need to be considered for more efficient removal of TrOCs within SAT integrated with Fenton-like reaction.