University of Guilan Caspian Journal of Environmental Sciences 1735-3033 15 4 2017 12 01 Advanced oxidation processes against alkyl phenols in groundwater samples 343 355 2657 10.22124/cjes.2017.2657 EN A Zaribafan National Institute of Genetic Engineering and Biotechnology, Tehran, Iran M Baharlouie Yancheshmeh National Institute of Genetic Engineering and Biotechnology, Tehran, Iran T Fathi Department of Soil and Water Pollution, Environmental Protection Organization of Iran, Tehran, Iran R Ahmadkhani Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran K Haghbeen National Institute of Genetic Engineering and Biotechnology, Tehran, Iran Journal Article 2017 05 31 Spectrophotometric examinations showed the presence of phenolic compounds in the organic residue collected from four groundwater resources located in vicinity of an oil refinery at the outskirt of Tehran. The average concentration of total phenolic compounds was about 0.38 mg.L^-1 in these samples using Folin-Ciocalteu method. GC-Mass analysis disclosed that alkylphenols were the major phenolic contaminants in the samples. Evaluation of the Advanced Oxidation Processes (AOPs) efficacy for removal of alkylphenols from real water samples is a hot topic of recent Environmental Research due to the decomposition of these compounds in soil and by microorganisms which may results in the formation of structures more resistance against various types of oxidation. To explore the efficacy of AOPs for removal of alkylphenols from the examined groundwater resources, the optimal conditions for three important AOP including Fe²⁺/H₂O₂/UV (Photo-Fenton), O₃/UV and O₃/UV/H₂O₂ were first sought using a recalcitrant lab sample containing different aromatic compounds with total concentration of 2 mg L^-1. Consequently, two methods of O₃/UV (2 mg L^-1 O₃, 15 min UVC), and O₃/UV/H₂O₂ (2 mg L^-1 O₃, 5000 mg L^-1 H₂O₂, 15 min UVC) were selected to be examined on the real samples. Although the selected methods were quantitatively effective on the lab sample, they resulted in average removal efficiencies of 79.71% and 84.16% on the real samples, respectively. With respect to the safety regulations, costs and easiness of implementation, the O₃/UV method seems to be more promising for large-scale plans. https://cjes.guilan.ac.ir/article_2657_9ec9dc7c3acac147c10dbbb8a61153bb.pdf