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Podu Iloaiei, Romania

Dulcea D.,Polytechnic University of Timisoara | Dulcea D.,Institute for Studies and Power Engineering | Ionel I.,Polytechnic University of Timisoara | Pascu L.F.,ECOIND Bucharest
Revista de Chimie | Year: 2015

In this article, the authors propose a comparative analysis of air quality in urban area of Timisoara before and after retrofitting of the local power plant, with the goal to identify the level of human discomfort. The air quality analysis was based on on line measurements consisting of legally attested equipment that was set up to monitor fine particulate matter, nitric oxides NO, NO2, carbon monoxide CO, sulphur dioxide SO2, and, as well as wind speed and direction. Emission data collected during 2 years, in 2012 and 2014 before and after retroritting, referring to maximum 24-hour concentrations and the occurrence of exceedances over the limit values are comparatively analyzed. The relative investigation presents the evolution for the concentration of the most important pollutants involved in the atmospheric pollution process. Finally, in addition to measures already achieved for retrofitting and declared effective by the comparative analysis, one also proposed supplementary pollutants control technologies on coal fired boilers in response to new requirements of air quality, as well state of art for the pollutant emissions. Source

Pascu D.-E.,University of Bucharest | Pascu M.,University of Bucharest | Pascu M.,Science HOFIGAL SA | Traistaru G.A.,Science ENECO Consulting S.R.L | And 3 more authors.
Revista de Chimie | Year: 2015

In this paper we intended to study the ability of iron adsorption from drinking water by two types of membranes: cellulose and composite. Adsorption studies were highlighted by means of adsorption isotherms: Langmuir, Freundlich, Flory-Huggins and Frumkin. The results revealed that iron adsorption was influenced by pH increase. The identification of iron in drinking water was done using two methods: spectrophotometry method and potentiometric redox titration with cerium sulphate method. The adsorption capacity of composite membrane increased when temperature was increased. Spectrophotometry method has proved to be better than potentiometric redox titration with cerium sulphate method. After 150 min was recorded the total iron removal from aqueous solution using the composite membrane. The pH value influenced significantly the adsorption capacity. As the pH increased, the adsorption capacity for both membranes decreased. Source

Inceu M.,Babes - Bolyai University | Meghesan A.,Babes - Bolyai University | Sandu I.,Al. I. Cuza University | Hosu A.,Babes - Bolyai University | And 2 more authors.
Revista de Chimie | Year: 2015

A multiresidue gas chromatography - mass spectrometry method was used in order to identify and determine pesticide residues in twenty-seven Romanian wine samples. Seventeen pesticides were identified (phthalimide, pyrimethanil, bifenthrin, cyprodinil, penconazole, tolylfluanide, diazinon, diphenylamine, chlorpyrifos-ethyl, tebuconazole, azoxystrobin, metalaxyl, propargite, tetrahydrophthalimide, boscalid, procymidone, o-phenylphenol) based on the retention times and on m/Z values of standard compounds. The quantitative determinations were achieved using two calibration curves obtained on different concentration intervals. The total pesticide residues determined using the proposed method were between 2.046 μg residue/kg wine and 798.236 μg residue/kg wine. In three of the analyzed wines, none of the above compounds were identified and the average is at 2.5 pesticides per bottle of wine. Source

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