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Title: ADVANCED REMOVAL OF GAMMA HCH FROM WATER BY ULTRASONICATION, FENTON AND PHOTO FENTON ULTRASONICATION
ADVANCED REMOVAL OF GAMMA HCH FROM WATER BY ULTRASONICATION, FENTON AND PHOTO FENTON ULTRASONICATION

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Mihai Stefanescu; Costel Bumbac; Ionut Cristea
10.5593/sgem2023V/3.2/s12.02
10.5593/sgem2023v/3.2
1314-2704
978-619-7603-64-4
English
23
3.2
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE •    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Hydrology and Water Resources
Historical pollution with hexachlorocyclohexane (HCH) isomers of soil and groundwater unfortunately is an unsolved problem, especially in some countries where Lindane is still produced, as also in Europe in the surrounding areas of former production sites or landfilling sites usually due to inadequate long-term storage, treatment or recovery of these wastes. HCH removal technologies are usually dedicated to soil remediation, leachate treatment, water and wastewater treatment. This paper presents the research efforts to develop a treatment technology for gamma HCH removal from water matrices by advanced oxidation processes (AOPs) based on ultrasonication, Fenton and photo Fenton oxidation. Five treatment systems were assessed comparatively: direct ultrasonication, oxidation with hydrogen peroxide, ultrasonication with hydrogen peroxide, Fenton ultrasonication and Fenton ultrasonication followed by photo Fenton oxidation. The energy (25-800 kJ) and amplitude of ultrasonic field, initial concentration of HCH (10 - 89 ?g/L), hydrogen peroxide (1 - 4000 x stoichiometric dose), iron (Fe II) doses (1-15 mg/L) and UV irradiation time (30-60 min.) were the main experimental parameters evaluated. The ultrasonic frequency was constant - 20 kHz in all experiments. Best treatment performance of 99.9% HCH removal efficiency was achieved after application of a treatment train combining Fenton ultrasonication followed by Fenton UV photolysis at the main experimental parameters of: 200 kJ ultrasonic energy, 1000 x s peroxide dose, 5 mg Fe(II)/L and 30 minutes of UV irradiation.
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The work has been conducted with the support of Romanian Ministry of Research, Innovation and Digitalization, UEFISCDI, under the research project PN IV 584 PED/2022.
conference
https://doi.org/10.5593/sgem2023V/3.2/s12.02
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 28-30 November, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
11-18
28-30 November, 2023
website
9387
hexachlorocyclohexane, ultrasonication, AOPs, Fenton oxidation