THE ENVIRONMENTAL IMPACT OF THE CIZMA - BĂIUȚ FIELD EXPLOITATION AND THE IMPLICATIONS IN THE DEVELOPMENT OF OTHER PROJECTS DUE TO THE INCLUSION IN THE PROTECTED AREA

The topic presented in the paper refers to two significant aspects regarding the impact of mining operations on the environment and the development of an alluvial mining project in the affected area. The mine waters that drain from the Cizma mining perimeter have an acidic character with a pH of 2.5 at the exit of the gallery with a load of heavy metals in ionic and precipitated form, discharging into a mountain stream, which later reaches in the area of some communities. The perimeter is located in a protected area, which encumbers exploitation projects in these areas.

STUDIES CONCERNING THE DETERMINATION OF CALCIUM AND MAGNESIUM IONS IN THE DUMBRAVITA AREA DRINKING WATER (FOUNTAIN WATER)

The paper showcases research conducted with the purpose of determining the Ca2+ and Mg2+ ions in the drinking water (fountain water) of a common household located in Dumbravita, Maramures County, Romania. The photometric method was used for this goal, as well as a Calcium and Magnesium Photometer. This study argues about implementing cost efficient techniques and precise analysis in order to determine Ca and Mg ions in the water samples.

STUDIES REGARDING THE DETERMINATION OF NITRITE IONS CONCENTRATION IN THE DUMBRAVITA AREA DRINKING WATER (FOUNTAIN WATER)

The paper showcases studies conducted in order to determine the existence of nitrate ions in the drinking water (fountain water) of a common household from the village of Dumbravita, Maramures County, Romania, as well as to determine the Romplumb S.A. wastewater ammonium ion. A Hanna Instruments photo colorimeter for boilers and cooling cannons was used in order to determine the nitrate ions concentration, which is a compact and versatile measuring device that can measure absorption and pH/mV, as well as a HR Hanna Nitrite photometer. Determining the ammonium ion was possible with the help of a multi parameter photo colorimeter, which employs the CAL Check function. In order to determine de nitrate ions concentration in the water samples, a photo colorimeter which employs the "Method selection"," Zero", "Read" and "Timers" functions was used. Using the "Nitrite LR" method, the device displays de nitrite-nitrogen (NO2--N) concentration measured in gg/l, and by accessing the secondary functions using the Chem Frm key, the result can be converted in gg/l of nitrite (NO2-) and sodium nitrate (NaNO2).

STUDIES ON THE DETERMINATION OF THE TOTAL HARDNESS OF THE DRINKING WATER COMING FROM THE "FÂNTÂNILE RECI" SPRING IN MARAMUREŞ

The paper showcases research conducted in order to determine the total hardness of the drinking water coming from the "Fântânile Reci" spring, located at the edge of the DN18 road, at the end of the Mara town, in Maramures, Romania. A HI97735 advanced portable photometer was used for this experiment. The photometer can perform low, medium and high range measurements of the total hardness of the water samples. The counter comes equipped with a superior optical system which uses a reference detector and a narrowband interference filter used for extremely quick and repeatable measurements. The values obtained as the result of the experiment are: 204 mg/l CaCO 3 (Total Hardness MR), 15,2 °E, 12,2°dH and 21,7°f. The LED light sources are superior compared to the tungsten lamps. LED lights are more efficient, providing more light while using less energy, and they produce little heat, which could otherwise affect the electrical balance.

STUDIES ON THE DETERMINATION OF PH/EC/TDS LEVELS IN THE GUTÂI MOUNTAINS DRINKING WATER FROM MARAMUREŞ

The paper showcases research conducted in order to determine pH, EC and TDS levels in the drinking water sampled from a spring located at an altitude of 925 meters at the edge of the DN18 road, which connects Shighetu Marmaţiei and Baia Mare, in Maramureş, Romania. A Tester Combo HI98130 was used for this experiment, a tester which is waterproof, extremely accurate and it can measure high range (0.00 - 20.00 mS/cm, EC/0.00 - 10.00 ppt TDS) EC/TDS and temperature. The results of the experiment are: pH = 7.25, EC = 0.08 mS/cm, TDS = 0.04 ppt at a temperature of 27,60C. This waterproof floating combined tester comes equipped with an easy to read LCD display and automatic stop. On top of that, pH and EC/TDS readings are automatically compensated by temperature (ATC) in order to prevent temperature related variations when taking measurements.

MODELLING THE WASTE DISPOSAL DEPOSIT - (PART IV)

This paper is part IV and a continuation of the scientific research conducted on the modeling and simulation of the state of induced stresses on a municipal landfill. The geometry of the proposed WASTE DISPOSAL DEPOSIT, the initial principal stresses, in the body of the warehouse and the stability calculations performed on them are presented.

PHYSICO-CHEMICAL AND ECOLOGICAL CHARACTERIZATION OF THE WATERS IN THE WETLANDS OF THE SARASĂU AREA LOCATED IN THE ROSCI AND ROSPA PROTECTED AREA

This paper presents a physico-chemical and ecological characterization of some ponds of anthropogenic origin, resulted from the drilling and extraction of lithological substrate. These artificial water bodies located in a Natura 2000 protected area are the result of some environmental pressures and replaced a potential meadow vegetation. The study aims to characterize the ponds in the perspective of their evaluation as support habitats for fauna and vegetation. For this, some typical physico-chemical parameters of water bodies, important to aquatic life, were analyzed: conductivity, pH, dissolved oxygen, oxygen saturation, turbidity, temperature, ammonium concentrations, nitrate, nitrites, free ammonia, total ammonia, free residual chlorine, total chlorine, phosphates, iron, copper, total alkalinity and water hardness. Also, the types of vegetation and natural habitats were identified and mapped. The analysis of the water quality in the studied area is very important for the conservation and improvement of the natural ecological system.

CASE STUDY REGARDING THE PREDICTION OF THE LAMINATING FORCE

Based on the mathematical model existent in the literature, the object of this study is a way to improve and simplify the way that the laminating force is determined. The whole process is realized using a provided rolling mill. The mathematical model that determines the laminating force has a theoretical base and it can approximately predict how the laminating force will vary. The relative degree of deformation tells us that de sample suffered an uneven deformation length, width and height wise. After the first lamination, the material loses plasticity and the reduction has to be as follows: higher at first, after which it drops, as the reduction degrees indicate. We created a probabilistic modelling approach that learns as new data is introduced.

ROCK MECANICAL ASSPECTS SIMULATIONS IN THE FUTURE OPEN PIT DEVELOPMENT

The proposed mining in a Porphyry copper deposit appears primarily restricted by the geometry/geomechanics of the deposit and secondly by mining methods and technology. The geometry/geomechanics of one deposit can be divided into three sections including western block and middle and eastern block. The greatest width has so far been discovered in the an middle block; all available information indicates that this will not change when the pit/mine is deepened. Assuming more or less continuous conditions within the three blocks towards the northern (rock will be added in the model) and southern rock) neighboring rock the greatest depth of the pit (> 511 m depth) will be reached in the middle block.

RECYCLING OF ALUMINUM WASTE RESULTING FROM EXTRUDED AND MOLDED PRODUCTS USED IN AERONAUTICAL TECHNIQUE

In this paper a case study was conducted at UAC Europe SRL which aims to analyze the detailed structure of the process components of waste recycling resulting from the extrusion and melting process, prepared to determine the factors underlying success, how the problem was identified, the chosen solutions and the highlighting of the final result, for the recycling of internal and manufacturing waste, the solution adopted and its advantages.