M. Purenović - Academia.edu (original) (raw)

Papers by M. Purenović

Central European journal of public health, 2003

In the submitted paper the water disinfection capacity of the microalloyed aluminium based compos... more In the submitted paper the water disinfection capacity of the microalloyed aluminium based composite (MABC) was studied. MABC is material in the form of steel wire, plated with microalloyed aluminium. The effects of the composite are based on the very negative stationary potential of microalloyed aluminium, and its spontaneous dissolution in water with generation of AI(III) ions, and reduction of water with the generation of H2 and OH ions. As a final product of these reactions, a voluminous Al(OH)3 precipitate is formed. Having in mind its great efficacy in purification of different waters from many chemical pollutants we made the following hypothesis: reduction characteristics of the MABC surface, presence of Al(III) and OH ions, and coprecipitation on Al(OH)3, can be also toxic and destructive for bacteria in water. The experiments were carried out with the water model solutions (WMS) based on adapted natural surface water (NSW), inoculated with the Escherichia coli. All treatmen...

Central European journal of public health, 2002

The investigation of the toxic effects and the uptake of aluminium by Escherichia coli in growth ... more The investigation of the toxic effects and the uptake of aluminium by Escherichia coli in growth medium (GM) and in physiological solution (PS) have been studied. The toxicity was quantitatively determined according to the decrease of the colony forming units (CFU) in the physiological solution, that is its growth inhibition in the growth medium, vs. the aluminium concentration and incubation time, at pH 5.2, 6.2 and 7.2. The uptake of aluminium was investigated by determining the intracellular aluminium in dry weights (DW), by graphite fumace atomic absorption spectrophotometry, considering that aluminium adsorbed to the cell surface was removed by washing with EDTA solution. The results show that toxicity and accumulation increase with the increase of the aluminium concentration and incubation time. However, the linearity of these functions was lost at higher values, which indicate dependence on time and concentration saturation. The effect of pH was specific, and correlated with ...

Facta universitatis- …, 2001

... UDC 628.161.3 + 546.62 Aleksandar Bojić1, Milovan Purenović1, Branislava Kocić2, Jelica Perov... more ... UDC 628.161.3 + 546.62 Aleksandar Bojić1, Milovan Purenović1, Branislava Kocić2, Jelica Perović1, Jasna Ursić-Janković1, Danijela Bojić1 ... 7. M. Novaković, M. Purenović, M. Miljković, J. Perović, S. Rancić and A. Bojić, Acta Biol. Iug. 33, S.2.8 (1998). ...

Zbornik radova …, 2009

Degradation of humic acids (HA) in water by UV/H2O2 oxidation was studied. The photolysis experim... more Degradation of humic acids (HA) in water by UV/H2O2 oxidation was studied. The photolysis experiments were conducted in a batch photoreactor with ten low-pressure mercury vapor lamps (λ= 253.7 nm), as a UV light source. The residual concentrations of HA were ...

Journal of Hazardous Materials, 2012

The procedure for obtaining a bentonite based composite involves the application of mixed Fe and ... more The procedure for obtaining a bentonite based composite involves the application of mixed Fe and Mg hydroxides coatings onto bentonite particles in aqueous suspension and subsequent thermal treatment of the solid phase at 498 K. Structural and textural modifications of montmorillonite which occurred during the synthesis of composite were confirmed by XRD technique and N(2) adsorption at 77K. The composite structure was found to be less ordered, while its specific surface area was about two times higher than the specific surface area of the starting/native bentonite. The effectiveness of the composite in Pb(II) removal from aqueous solutions at different initial concentrations, pH and ionic strengths of the solutions was examined. The equilibrium adsorption data were analyzed using three widely applied isotherms: Langmuir, Freundlich and Dubinin-Radushkevich. The composite effectively removes both ionic and colloidal forms of Pb(II) from water and the maximum adsorption capacity obtained from the Langmuir equation was 95.88 mg/g. The main mechanisms of Pb(II) removal at low pH values were ion-exchange and outer-sphere surface complexation.

Environmental Chemistry Letters, 2004

We studied the removal of cadmium and copper from industrial wastewaters by a microalloyed alumin... more We studied the removal of cadmium and copper from industrial wastewaters by a microalloyed aluminium composite. The composite was highly efficient, resulting in water concentrations of cadmium and copper below the maximal allowed concentrations for drinking water. Moreover, our results show that the removal mechanism is mainly based on reduction and coprecipitation, since Cd and Cu were removed from the

Journal of the Serbian Chemical Society, 2012

The photochemical decolorization of C.I. Reactive Orange 16 (RO16), a reactive textile azo dye, b... more The photochemical decolorization of C.I. Reactive Orange 16 (RO16), a reactive textile azo dye, by the UV/H 2 O 2 process was studied using a batch photoreactor with UV lamps emitting at 253.7 nm. Complete decolorization of 50.0 mg dm -3 initial dye concentration was achieved in less than 6 min under optimal conditions (25 mM initial peroxide concentration, at pH 7.0 and with a UV light intensity of 1950 μW cm -2 ). The effects of experimental variables, such as initial pH, initial concentration of H 2 O 2 , initial dye concentration, and the intensity of UV light were studied. The highest decolorization rates were realized at a peroxide concentration in range from 20 to 40 mM, above which decolorization was inhibited by the scavenging effect of the peroxide. The decolorization was more efficient in neutral pH values. The efficiency of the process was improved with lower initial dye concentrations and at higher intensities of UV light.

Central European journal of public health, 2003

In the submitted paper the water disinfection capacity of the microalloyed aluminium based compos... more In the submitted paper the water disinfection capacity of the microalloyed aluminium based composite (MABC) was studied. MABC is material in the form of steel wire, plated with microalloyed aluminium. The effects of the composite are based on the very negative stationary potential of microalloyed aluminium, and its spontaneous dissolution in water with generation of AI(III) ions, and reduction of water with the generation of H2 and OH ions. As a final product of these reactions, a voluminous Al(OH)3 precipitate is formed. Having in mind its great efficacy in purification of different waters from many chemical pollutants we made the following hypothesis: reduction characteristics of the MABC surface, presence of Al(III) and OH ions, and coprecipitation on Al(OH)3, can be also toxic and destructive for bacteria in water. The experiments were carried out with the water model solutions (WMS) based on adapted natural surface water (NSW), inoculated with the Escherichia coli. All treatmen...

Central European journal of public health, 2002

The investigation of the toxic effects and the uptake of aluminium by Escherichia coli in growth ... more The investigation of the toxic effects and the uptake of aluminium by Escherichia coli in growth medium (GM) and in physiological solution (PS) have been studied. The toxicity was quantitatively determined according to the decrease of the colony forming units (CFU) in the physiological solution, that is its growth inhibition in the growth medium, vs. the aluminium concentration and incubation time, at pH 5.2, 6.2 and 7.2. The uptake of aluminium was investigated by determining the intracellular aluminium in dry weights (DW), by graphite fumace atomic absorption spectrophotometry, considering that aluminium adsorbed to the cell surface was removed by washing with EDTA solution. The results show that toxicity and accumulation increase with the increase of the aluminium concentration and incubation time. However, the linearity of these functions was lost at higher values, which indicate dependence on time and concentration saturation. The effect of pH was specific, and correlated with ...

Facta universitatis- …, 2001

... UDC 628.161.3 + 546.62 Aleksandar Bojić1, Milovan Purenović1, Branislava Kocić2, Jelica Perov... more ... UDC 628.161.3 + 546.62 Aleksandar Bojić1, Milovan Purenović1, Branislava Kocić2, Jelica Perović1, Jasna Ursić-Janković1, Danijela Bojić1 ... 7. M. Novaković, M. Purenović, M. Miljković, J. Perović, S. Rancić and A. Bojić, Acta Biol. Iug. 33, S.2.8 (1998). ...

Zbornik radova …, 2009

Degradation of humic acids (HA) in water by UV/H2O2 oxidation was studied. The photolysis experim... more Degradation of humic acids (HA) in water by UV/H2O2 oxidation was studied. The photolysis experiments were conducted in a batch photoreactor with ten low-pressure mercury vapor lamps (λ= 253.7 nm), as a UV light source. The residual concentrations of HA were ...

Journal of Hazardous Materials, 2012

The procedure for obtaining a bentonite based composite involves the application of mixed Fe and ... more The procedure for obtaining a bentonite based composite involves the application of mixed Fe and Mg hydroxides coatings onto bentonite particles in aqueous suspension and subsequent thermal treatment of the solid phase at 498 K. Structural and textural modifications of montmorillonite which occurred during the synthesis of composite were confirmed by XRD technique and N(2) adsorption at 77K. The composite structure was found to be less ordered, while its specific surface area was about two times higher than the specific surface area of the starting/native bentonite. The effectiveness of the composite in Pb(II) removal from aqueous solutions at different initial concentrations, pH and ionic strengths of the solutions was examined. The equilibrium adsorption data were analyzed using three widely applied isotherms: Langmuir, Freundlich and Dubinin-Radushkevich. The composite effectively removes both ionic and colloidal forms of Pb(II) from water and the maximum adsorption capacity obtained from the Langmuir equation was 95.88 mg/g. The main mechanisms of Pb(II) removal at low pH values were ion-exchange and outer-sphere surface complexation.

Environmental Chemistry Letters, 2004

We studied the removal of cadmium and copper from industrial wastewaters by a microalloyed alumin... more We studied the removal of cadmium and copper from industrial wastewaters by a microalloyed aluminium composite. The composite was highly efficient, resulting in water concentrations of cadmium and copper below the maximal allowed concentrations for drinking water. Moreover, our results show that the removal mechanism is mainly based on reduction and coprecipitation, since Cd and Cu were removed from the

Journal of the Serbian Chemical Society, 2012

The photochemical decolorization of C.I. Reactive Orange 16 (RO16), a reactive textile azo dye, b... more The photochemical decolorization of C.I. Reactive Orange 16 (RO16), a reactive textile azo dye, by the UV/H 2 O 2 process was studied using a batch photoreactor with UV lamps emitting at 253.7 nm. Complete decolorization of 50.0 mg dm -3 initial dye concentration was achieved in less than 6 min under optimal conditions (25 mM initial peroxide concentration, at pH 7.0 and with a UV light intensity of 1950 μW cm -2 ). The effects of experimental variables, such as initial pH, initial concentration of H 2 O 2 , initial dye concentration, and the intensity of UV light were studied. The highest decolorization rates were realized at a peroxide concentration in range from 20 to 40 mM, above which decolorization was inhibited by the scavenging effect of the peroxide. The decolorization was more efficient in neutral pH values. The efficiency of the process was improved with lower initial dye concentrations and at higher intensities of UV light.