Elena Maria Pica

Elena Maria Pica
Universitatea Tehnica Cluj-Napoca | UT Cluj · Department of Chemistry

Prof. PhD. Chem and PhD Advisor Environmental Engineering

About

76
Publications
11,111
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283
Citations
Introduction
My name is Elena Maria PICA. I gratuated to Chemistry Faculty from Cluj-Napoca, Romania. I worked as a recearcher to the Chemistry Faculty from Cluj-Napoca, from september 1971 until september 1977. I am PhD and Professor. I worked to the Department of Chemistry, Technical University, Cluj-Napoca from septembre 1977 until september 2012. I am Emeritus Professor from 2015 and Professor, PhD Advisor. I am interested in: Analitycal Chemistry, Material Chemistry, Electrochemistry and the Environment and pollution. Other informations you find to the: http://chimie.utcluj.ro/pica; http://chimie.utcluj.ro/elma/; https://erris.gov.ro/Laboratory-of-Electrochemist; http://rausor.freewb.ro; http://padin18.freewb.ro
Additional affiliations
January 2015 - present
Universitatea Tehnica Cluj-Napoca
Position
  • Professor Emeritus
October 2012 - September 2016
Universitatea Tehnica Cluj-Napoca
Position
  • Professor (Associate)
January 2010 - December 2017
Universitatea Tehnica Cluj-Napoca, Romania
Position
  • Professor

Publications

Publications (76)
Article
The trivalent gadolinium, doped lead-lead dioxide glass, with the chemical composition xGd2O3•(100 − x) [4PbO2•Pb], where x= 10–50 mol% Gd2O3 have been successfully fabricated by conventional melt quenching technique, and investigated by X-ray diffraction, Fourier Transform Infrared, Electron paramagnetic resonance, Ultraviolet-Visible, and Photolu...
Article
The new glass system, with the chemical composition xEu2O3•(100 − x)[4PbO2•Pb] where x = 0-10 mol% Eu2O3, obtained by melt quenching method, was investigated by XRD analysis, FTIR, UV-Vis and PL spectroscopy for optical devices applications. The XRD analysis reveals the vitreous structure of the obtained samples. The FTIR absorption spectra reveal...
Article
The rare earth ion doped materials having the xGd2O3•(100-x)[4B2O3•Pb] composition where x = 0–50 mol% Gd2O3 were synthetised by the melt queching method. XRD data show the formation of the Pb and Pb2O crystalline phases in the glass ceramics. The gadolinium ions can be intercalated into the host matrix by the deforming of B-O-B angles and the form...
Article
Full-text available
Ozonation Influence on Aluminium Ions in an Aqueous Solution, in Different Temperature Conditions http://www.icrtmme-conf.org/. Corina Ioana Neamtu1, a, Liviu Calin Bolundut2, b and Elena Maria Pica3, c 1, 2, 3 Technical University of Cluj-Napoca, Faculty of Engineering Materials and the Environment, 28 Memorandumului Street, 400114 Cluj-Napoca, Ro...
Cover Page
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Personal data
Article
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The paper presents an assessment of the chemical composition of the oily mill scale from wastewater treatment. The determination of chemical composition of the wastes samples was achieved by spectrophotometric methods. The device used was a spectrometer based on X-ray fluorescence and a atomic absorption spectrophotometer. The chemical composition...
Article
The lead acid batteries are widely used in automobile and provide spent electrodes composed of PbO2/PbSO4 and Pb/PbSO4. Today, batteries are treated and recycled using the pyrometallurgical and hydrometallurgical techniques. However, these techniques have some important disadvantages: i) the small lead recovery rate (due to the rapid oxidation of t...
Article
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p>This paper intends to inform the scientific and engineering community on the importance of wastewater treatment plants of small capacity, designed for rural settlements. By analysing the evolution of Romania’s population by towns, on 1st January 2010, the weight of urban population was 55.1 %, and the weight of the rural population was 44.9 % of...
Article
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Assessing risks related to urban soil contamination represents a key part of pollution management. The current research proposes a quantitative method that defines and highlights unacceptable risks. The applicability of the method is presented in a case study on several urban recreational areas from the city of Cluj-Napoca, Romania. Concentrations...
Article
A new class of glass and vitroceramic electrodes with applications for rechargeable batteries was obtained by a melt quenching method. The structural characterization of the samples having the xPb·(100-x)PbO2 composition, where x=0, 10, 20, 30, 40 and 50 mol% Pb, was performed by UV-vis and FTIR spectroscopies investigations. UV-vis and FTIR data r...
Article
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The aim of this paper is to assess the chemical and mineralogical composition and the leaching behavior of the electric arc furnace slags (EAFS) in order to improve their management by identifying suitable reuse options in different fields. The chemical and mineralogical composition of slag varies from one type of steel to another, from one technol...
Article
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Soil contamination in recreational areas can considerably affect children's health, as they are the segment of the population most sensitive to anthropogenic contamination. Soil contamination in recreational areas is influenced by a number of factors such as type and age of the recreational area, nearby traffic intensity, proximity to industrial ar...
Article
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Abstract—The increase of anthropogenic activities has led to economic development. Scientific environmental researchers show that this may alter the quality of environmental factors such as air, water and soil. High concentrations of soil contaminates in urban areas have been highlighted in scientific studies and led to the conclusion that soil in...
Article
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Abstract—The increase of anthropogenic activities has led to economic development. Scientific environmental researchers show that this may alter the quality of environmental factors such as air, water and soil. High concentrations of soil contaminates in urban areas have been highlighted in scientific studies and led to the conclusion that soil in...
Article
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The surface of a locality, number of inhabitants and density are socio-demographic descriptive indicators of territorial and administrative divisions frequently related to urban soils contamination in environmental scientific research. The present study aims at assessing the connection between these indicators and pollution with various chemical el...
Article
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In the landfill management process appear important pollutants such as landfill gas and leachate. Landfill gas presents a high explosion risk and highly contributes to the greenhouse effect. The leachate resulted from the waste elution process is recognised as having a complex composition, rich in organic matter, ammonia and heavy metals with toxic...
Article
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Reducing the concentration of lead ions in a wastewater using zeolite has proven to be a successful water treatement method, all over the world. Putting the two media (solid and liquid) in contact in static conditions had good results regarding the concentration of the filtered solution, the pH and the electric conductivity, depending on the values...
Conference Paper
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In 2007, through the accession of Romania to the European Union, the Government of Romania made the commitment to put into practice the project on implementing the Directive 91/271/EEC concerning urban wastewater treatment. For the second transition phase, according to Directive 91/271/EEC, it is necessary that by December 31st, 2015 all the locali...
Article
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Waste management policy benefits nowadays from a major importance both internationally and nationally, being subjected to constant improvements. Also, the impact on the quality of the environmental factors and on human health leads to the special attention that waste management benefits from on a global level. The current approach on the issue emer...
Article
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IIn 2007, through the accession of Romania to the European Union, the Government of Romania made the commitment to put into practice the project on implementing the Directive 91/271/EEC concerning urban wastewater treatment. For the second transition phase, according to Directive 91/271/EEC, it is necessary that by December 31 st , 2015 all the loc...
Article
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Abstract: The paper presents a study of the sound pollution caused by economic activities in the immediate vicinity of the National Park Reserve Natural of Rodna Mountains. The work, according to the study conducted, acting unfavorably on the fauna and flora Habitat. From the reserved area it was found that the animals and the birds have migrated t...
Article
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Abstract: This paper presents a study on the noise level coming from forestry activities carried out within the Rodna Mountains National Park. It is known that there were 76 logging places on the reservation territory registered from January to September 2014, placed at a considerable distance inner the park boundaries. Corroborating the noise rec...
Method
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Filmuletul prezinta un scurt mod de desfasurare a lucrarii de laborator: ”Analiza apelor industriale”, pentru studentii din anii I de la Facultatea de Constructii de Masini si Facultatea de Mecanica
Method
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Filmuletul prezinta un scurt mod de desfasurare a lucrarii de laborator: ”Coroziunea electrochimica a metalelor”, pentru studentii din anii I de la Facultatea de Constructii de Masini si Facultatea de Mecanica
Method
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Filmuletul prezinta un scurt mod de desfasurare a lucrarii de laborator: ”Protectia metalelor impotriva coroziunii. Nichelare”, pentru studentii din anii I de la Facultatea de Constructii de Masini si Facultatea de Mecanica
Method
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Filmuletul prezinta un scurt mod de desfasurare a lucrarii de laborator: ”Sisteme disperse. Concentartia solutiilor”, pentru studentii din anii I de la Facultatea de Constructii de Masini si Facultatea de Mecanica
Method
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Filmuletul prezinta un scurt mod de desfasurare a lucrarilor de laborator: ”Analiza elementelor din oteluri cu electrograful” si ”Analiza lubrifiantilor si a combustibililor”, pentru studentii din anii I de la Facultatea de Constructii de Masini si Facultatea de Mecanica
Article
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Forty-five soil samples collected from fifteen intensively visited recreational areas in four different sized urban settlements in central Transylvania, Romania were investigated through X-ray powder diffraction for mineralogical characterization and analyzed using atomic absorption spectrometry in order to identify Cd, Cu, Co, Pb, Zn, Mn and Ni co...
Article
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Water is a common asset of the planet, and every country has the obligation to protect the water from the effects of pollution for the good of the entire mankind. The importance of water for the environment has become a major component of the laws of every country. This article makes a comparative analysis of water protection standards in terms of...
Article
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Metal waste disposed in the environment outside the landfills is a persistent type of polutant both for water and soil. The percolation of rainwater in the mass of waste determines the release of toxic substances in soil and groundwater. Using water polluted with such contaminants for food preparation has negative effects on human health. This stud...
Article
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The present study aims at comparing the metal concentrations identified for Cd, Cu, Pb, Zn and Ni in two highly inhabited cities with similar characteristics situated in two countries that apply different policies when it comes to soil contamination. The metal concentration of urban soils in Bucharest, the capital of Romania, was investigated and c...
Article
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Removing heavy metals from water has been a subject of high interest in the recent decades. The global concern aimed at identifying efficient and inexpensive methods for wastewaters depollution. Ozonation is one of the successful methods, due to the ozone strong oxidative attributes. The present paper is a study on decreasing the concentration of l...
Article
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The paper presents the experimental researches regarding the air pollution with sulfur dioxide (SO2) to the steelmaking in the electric arc furnace. It presents a method for determining the sulfur dioxide (SO2) concentrations from the steelmaking, the diagram variation of the sulfur dioxide (SO2) concentrations over time during specific technologic...
Patent
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This sensor is used for the determination of silver in various liquid samples in order to control analytically processes, of the various chemical, biochemical, to conducting theoretical and practical studies with scientific purpose. Also, the sensor should be used more for the determination of halides from natural or synthetic samples by potentiome...
Conference Paper
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This paper represents an analysis of the development of sewage treament plants, in Romania, for the next decade. It also describes the current solutions to reduce operating costs for wastewater treatment. Although current solutions are viable for large capacity wastewater treatment plants, they are not efficient for small capacity water treatment p...
Article
The steelmaking process in the electric arc furnace causes environmental pollution in all its components: water, air and soil. The electric arc furnace steelmaking is considered to be an industrial process with high degree of pollution because solid wastes (slag, dust) and gaseous pollutants (carbon oxide, sulfur oxide, nitrogen oxide, volatile org...
Article
The purpose of this paper is to identify the sites that have a pollution potential due to metallurgical activities in Romania. The amount of metallurgical slag generated depends on the steel production (Iluţiu - Varvara, 2007). The total quantities of metallurgical slag generated far exceed 200 million tons of slag (Bălan, 2010).
Conference Paper
Full-text available
A short chemical study of the carbon dioxide influence on cultural heritage is presented. The CO2 concentration of the solutions used in the chemical study was determined with a CO2 electrochemical sensor. Were registered linear voltammograms and impedance spectra for the CO2 which present a variation with CO2, (CO3 2-) concentration from the solu...
Method
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Principiul de funcţionare al electrodului se bazează pe măsurarea potenţialului ce se dezvoltă pe suprafaţa de cupru, care este determinat de concentraţia în CO2 a soluţiei în care este imersat electrodul. Senzorul şi electrodul de referinţă se cuplează la un ionmetru/milivoltmetru. Cuplul de electrozi imersaţi în soluţie formează o celulă electroc...
Poster
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Principiul de funcţionare a electrodului se bazează pe măsurarea potenţialului ce se dezvoltă pe suprafaţa de cupru, care este determinat de concentraţia în CO2 a soluţiei în care este imersat electrodul. Senzorul şi electrodul de referinţă se cuplează la un ionmetru/milivoltmetru. Cuplul de electrozi imersaţi în soluţie formează o celulă electroch...
Article
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This paper studies the impact of sustainable development of tourism in the North West region of Romania upon the cultural heritage to be met in the respective area. Romania owns a high value cultural and historic heritage of more than 700 national and international heritage pieces which attract tourists from all over the country and world. Cultural...
Article
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Two manganese(III) porphyrins: manganese(III) tetraphenylporphyrin chloride and manganese(III)-tetrakis(3-hydroxyphenyl)porphyrin chloride were tested as ionophores for the construction of new diclofenac-selective electrodes. The electroactive material was incorporated either in PVC or a sol-gel matrix. The effect of different plasticizers and addi...
Patent
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Nitrite selective potentiometric sensor is used to measure the concentration of nitrite in the different samples, such as environmental pollution, food control, scientific studies etc. http://www.osim.ro/publicatii/brevete/bopi_2010/bopi110.pdf
Article
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Aluminium reduction cells service life and cell efficiency are strongly influenced by the side wall refractory lining. The aluminum phosphate bonded SiC refractories developed by us, instead of the carbon ones, have increased the cell capacity and productivity by the larger anode surfaces. In order to rank performances of various SiC products were...
Article
A new designed genetic algorithm was run on experimental data obtained from measurements of octanol-water partition coefficients of a series of polychlorinated biphenils, in order to relate their structure with their activity. A family of molecular descriptors having all necessary ingredients to run a genetic algorithm on it characterized the struc...
Article
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Metalloporphyrins such as Rh(III)TPPCI and Zr(IV)TPPCI2 [1] were used as ionophores to prepare nanostructurated polymeric membrane sensors for thiocyanate and fluoride. Results from Potentiometric experiments suggest the optimal membrane composition with these molecular systems [2] which is essential to improve the selectivity and the stability of...
Article
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Two functionalized porphyrins: 5,10,15,20-tetrakis(3,4-dimethoxyphenyl) porphyrin (A) and 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrin (B) obtained and characterized by us were used as ionophores (I) for preparing PVC-based membrane sensors selective to Ag+, Pb2+ and Cu2+. The membranes were prepared using three different plasticizers: (bis(2-ethy...
Article
Full-text available
In this work we report on a vibrational spectroscopic, X-ray diffraction, and density measurement study of the structural properties of the ternary xGd2O3(100−x)[7TeO2·3V2O5] systems for various x values up to 70mol%. Structural changes, as recognized by analyzing band shapes of X-ray diffraction and IR spectra, revealed that Gd2O3 causes a higher...
Article
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Two mathematical models with seven and six parameters have been created for use as methods for identification of the optimum mobile phase in chromatographic separations. A series of chromatographic response functions were proposed and implemented in order to assess and validate the models. The assessment was performed on a set of androstane isomers...
Article
Full-text available
The purpose of this study was the elaboration and characterization of the nitrite-selective electrode. A PVC membrane electrode based on the Co (III)- porphrinato chloride (CoTPPCl) is described. The electrode revealed a Nernstian response over a wide ion concentration range 10-5- 10-1M. The best performance was obtained with a membrane composition...
Article
Full-text available
The potentiometric response characteristics of a nitrite-selective electrode based on Co (III) tetraphenylporphyrins (TPP) in o-nitrophenyloctylether plasticized polyvinyl chloride membranes are compared. To establish the optimum composition of the membrane, different molar percents of cationic derivative (0-100 mol% relative to ionophore) were use...
Article
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ABSTRACT. Experimental methods rarely give reliable values of the free surface energies/surface tensions for solid metals and just few data exist. Therefore correlations between surface and bulk thermodynamic properties are important in order to obtain estimated values for the surface quantities. From experimental values, molar free surface ene...
Article
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Linear relationships between moisture (as received, W-l(i), hygroscopic, W-h(a), and total, W-l(i) as well as volatile matter content (V-i) and higher heating value (HHVi) versus the respective ashcontent (A), were observed for Vladimir lignite. Equations, errors and correlation coefficients are given.
Article
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Linear relationships between higher healing value (HHV) (14 samples) and volatile matter content (VM) (15 samples) vs. ash content (A) of Vladimir lignite (moisture free) were investigated. Both straight lines have high correlation coefficients (-0,998 for HHV and -0,9997 for VM). Their equations are: HHV = (25.71 ± 0.94) - (0.312 ± 0.022)A and VM...
Article
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A statistical study of analysis results was made for lignite from the Fărcăşeşti area (Gorj County, Romania), exemplified for the eight characteristic properties, as moisture content (imbibitions and hygroscopic), volatile, density, sulfur, ash softening content, higher heating value and seam. Previously, the properties dependencies were investigat...
Article
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A plasticized ion-selective membrane based on PVC matrix which tricrezylphosphate (TCP) and containing K+ - ionophores (dibenzo-18-crown-6 and decyl-18-crown-6) was used to obtain a potentiometric potassium sensor. The potassium selective membranes were characterized in terms of their electrochemical and physical properties, surface morphology and...
Article
Full-text available
Four kinds of 18-crown-6 derivatives were studied as ionophores in plasticized poly(vinyl chloride) (PVC) in order to obtain potassium selective membrane. The properties of the sensor were studied in detail. For the optimization of the selectivity toward K+ over Na+ the influence of the following factors was studied: nature and concentration of the...
Article
Full-text available
Optically clear CdS films as thick as 0.05–0.35μm were deposited on glass supports. The composition of the baths was CdCl2 1–2.5×10−3 M, thiourea 1–2.5×10−2 M and NH3 0.65–1.70M, in the presence of surfactants such as polyethylene glycol 600 or ether sulfate 12–14, at temperatures of 40–60°C. For the first time, the influence of these surfactants o...
Thesis
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The thesis deals with the elaboration and study of electrochemical sensor for continuous determination of oxygen from different liquids or gases. Were studied the reduction of oxygen in different pH environments on gold, platinum, silver and charcoal paste electrodes, by cyclic voltammetry and cronopotentiometry. CZU-Classificationindicie: 544.6:54...
Patent
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The electrochemical sensor is used for the continuous determination of oxygen from different liquids or gases. Also, the sensor should be used more for the determination of oxygen from natural or synthetic samples by amperomtric methods.
Article
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The paper presents the using of current sensors in measurements of the oxygen content in the organic solutions such as beer. The resulted data it serves in a comparison with spectrophotometric data.
Article
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It is discussed the most usual chemical methods and alternative technologies of desulphurisation of waste gases from the industrial processes. The advantage of using chemical methods vs. electrochemical methods is given by low price costs of first ones. These methods are useful at laboratory scale, and do not necessitate complex laboratory apparatu...