Râmnicu Vâlcea, Romania
Râmnicu Vâlcea, Romania

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Iordache I.,Institute for Cryogenics and Isotopic Technologies | Wilson S.,University of Oslo | Lundanes E.,University of Oslo | Iordache M.,Institute for Industrial Ecology ECOIND | And 2 more authors.
Environmental Engineering and Management Journal | Year: 2010

In this study, the authors explore the potential of ultrasound and wet catalyzed peroxide oxidation into the wastewater treatment processes. The processes applied for degradation of pesticides were carried out using Fenton reagent and sonochemical treatment. The Fenton and the sono-Fenton decomposition of 2,4-dichlorophenoxyacetic acid (2,4 D), 4-(2,4-dichlorophenoxy)butyric acid (2,4 DB), 4-chloro-o-tolyoxyacetic acid (MCPA), 3,5-dibromo-4- hidroxybenzonitrile (bromoxynil), and 3-(4-chlorophenyl)-1,1-dimethylurea (monuron) showed that, in all cases ultrasound irradiation of wastewater improved the wet oxidation process.

Ihos M.,Institute for Industrial Ecology ECOIND | Remes A.,Polytechnic University of Timişoara | Manea F.,Polytechnic University of Timişoara
Journal of Environmental Protection and Ecology | Year: 2012

The electrochemical behaviour of sodium diclofenac (DCF) was investigated on borondoped diamond (BDD) electrode in 0.1 M Na2SO4 supporting electrolyte. The oxidation process, kinetics, and useful parameters for DCF detection were studied by cyclic voltammetry (CV) technique. The oxidation peak at about +0.7 V/SCE was selected for amperometric/voltammetric detection of DCF. The linear dependences of the current versus DCF concentrations were reached for the concentration range between 0.31 and 31.1 μM by using CV, chronoamperometry (CA), square-wave voltammetry (SWV) and differential-pulsed voltammetry (DPV). The sensitive, simple and timesaving voltammetric procedure was developed, optimised and tested on spiked tap water sample.

Dumitrescu C.,Institute for Industrial Ecology ECOIND | Stefanescu M.,Institute for Industrial Ecology ECOIND | Pena-Leonte E.,Institute for Industrial Ecology ECOIND | Bumbac C.,Institute for Industrial Ecology ECOIND | And 4 more authors.
Journal of Environmental Protection and Ecology | Year: 2010

Our research is an attempt to treat the municipal treatment plants influents in a three-step (anoxic, anaerobic and aerobic) pilot installation and photoinduced oxidation processes for xenobiotics removal. The advanced treated effluents could be reused as irrigation water (STAS 9450/88). Degradation of chlorobenzenes using various photoinduced oxidation processes such as UV/H 2O2, UV/O3 and UV/H2O 2/O3, was investigated. Comparative analyses of removal efficiencies for trichlorobenzene (TCB) and hexachlorobenzene (HCB) taking into account tested operating parameters were performed. The operating parameters with significant influence upon the removal efficiencies of chlorobenzenes in homogeneous advanced oxidation processes (AOPs) are as following: micropollutants concentrations, reaction/irradiation time and oxidants doses (H2O2,O3). The selected variant, based on laboratory experiments could be used as tertiary treatment step for the municipal wastewater treatment plant, after verification of microbiological indicators, and the final effluent could be used in agricultural purposes - irrigations.

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