Andrei Tudor RUSU


32-90 ELIMINAREA PESTICIDELOR DIN MEDIUL ACVATIC

TAPPING PESTICIDES FROM AQUATIC ENVIROMENT
Throughout agricultural technologies a series of chemical substances are used for pest-control. Among this substance, we have to notice the pesticides due to their negative impact on the aquatic ecosystem. The most dangerous pesticides are the organochlorines, because of their property to accumulate into adipose tissues. Organochlorines through their chemical composition have mutagenic and carcinogenic potency.
The paper provides several methods for tapping these substances from surface waters. One of the methods often used is using selective membranes during the process of reverse osmosis providing chemical oxidation and adsorption.
Keywords: pesticides, pollution, waste water polluted with pesticides
Cuvinte cheie: pesticide, poluarea apelor, epurarea apelor poluate cu pesticide

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28-79 ASPECTE PRIVIND CALITATEA AERULUI DIN MEDIUL URBAN

ASPECTS OF URBAN AIR QUALITY Air pollution can cause and aggravate respiratory diseases, cardiovascular damage forests, increase soil acidity and water can affect crops and cause corrosion of buildings. We can see that many air pollutants that contribute to climate change and climate change in turn will affect air quality in the future. The concentration of aerosol particles in the atmosphere is an important parameter for assessing air quality. For example, variations in the concentration of the aerosol particles will differ greatly in urban areas to rural areas or industrial areas to their neigh boring areas. The paper presents the results of measurements on powders bet on suspension of Cluj-Napoca city has bet on different areas.
Keywords: air quality, aerosol particles, air pollution

Cuvinte cheie: calitatea aerului, particule ȋn suspensie, poluarea aerului

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19-67 UTILIZAREA DEŞEURILOR CA SURSĂ ALTERNATIVĂ DE ENERGIE

USING WASTE AS AN ALTERNATIVE ENERGY SOURCE
Urban waste in storage can be an inexhaustible source of energy.
Under the action of bacteria, an organic substance from waste undergoes
anaerobic reduction as a result the significant amount of biogas, which contains
an average of over 50 % methane, which has a high calorific value. These
gases can be captured by a network of pipes, filters, dryers can be fuel for an
internal combustion engine driving a generator, or can be liquefied. Thus from
the waste, obtain electricity, clean energy and easy to carry. In this way all
urban landfills in Romania can become energy producers. The benefits are
enormous, in that energy from waste sites and biogas is captured with a more
powerful greenhouse gases than carbon dioxide.
Keywords: waste, alternative energy source, biogas, greenhouse, gas
Cuvinte cheie: deşeuri, sursă alternativă de energie, biogaz, efect de
seră, gaz metan

67 UTILIZAREA DEŞEURILOR CA SURSĂ