Degradation of aldrin in adsorbed system using advanced oxidation processes: comparison of the treatment methods.
In this study, Fenton, UV/Fenton, UV/H2O2, UV/Fe2+ advanced oxidation processes have been applied for degradation of aldrin adsorbed on Na-montmorillonitte and activated carbon. Aldrin adsorbed on Na-montmorillonitte was degraded more efficiently than that of on activated carbon. For example, in UV/Fenton technique 95% of aldrin was removed from Na-montmorillonitte while 50% degradation was observed on activated carbon. Degradation of aldrin adsorbed on Na-montmorillonitte has also been achieved effectively using UV/Fe2+ technique despite the absence of H2O2. All AOPs but Fenton have been observed nearly equally effective for degradation of aldrin on Na-montmorillonitte sorbent. Fenton reaction exhibited least activity in degradation aldrin adsorbed on Na-montmorillonitte. The experiments with activated carbon sorbent indicated that phenyl groups in activated carbon structure and aldrin molecules exhibited competitive behavior on reaction with OH* radicals. The results of infrared spectroscopy support this assumption. The degradation efficiency of aldrin using activated carbon sorbent was determined in the following order: UV/Fenton > UV/H2O2 > Fenton > UV/Fe2+.
Kusvuran
Erdal
E
Chemistry Department, Arts and Sciences Faculty, Cukurova University, Balcali, Adana 01330, Turkey. ekusvuran@cu.edu.tr
Erbatur
Oktay
O
D000327:Adsorption; D000452:Aldrin / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry; D001546:Bentonite / Q000737:chemistry; D002606:Charcoal / Q000737:chemistry; D000077215:Clay; D005296:Ferrous Compounds / Q000737:chemistry; D006256:Hazardous Waste / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000737:chemistry; D006868:Hydrolysis; D007501:Iron / Q000737:chemistry; D010084:Oxidation-Reduction; D017670:Sodium Compounds / Q000737:chemistry
D000538:Aluminum Silicates; C045076:Fenton's reagent; D005296:Ferrous Compounds; D006256:Hazardous Waste; D017670:Sodium Compounds; D001546:Bentonite; D002606:Charcoal; D006861:Hydrogen Peroxide; D007501:Iron; D000452:Aldrin; D000077215:Clay