ASPECTS RELATING CHEMICAL FERTILIZERS
IMPACT ON SOIL
Chemical fertilizers are frequently used in agriculture for increasing agricultural outputs. Incorrect handling can cause soil pollution and damage to surface waters. The paper provides a series of chemical fertilizers examples used frequently in Romania. Furthermore the paper is showing an analysis on their impact on soil and water. A series of determinations were made for revealing their presence and their provenance. In this regard the paper is proposing to carry out a data base for revealing information about: identification, implementation and evaluation of risk assessment on soil caused by certain pollutants (heavy metals, nitrides).
Keywords: fertilizer, soil pollution, impact on the environment
Cuvinte cheie: îngrășăminte chimice, poluarea solului, impact asupra mediului
ASPECTS RELATING CHEMICAL FERTILIZERS
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
AN EFFECTIVE ALTERNATIVE TO LINEAR ECONOMY: CIRCULAR ECONOMY
According to previous European Commissioner for Environment- Janez Potocnick, “Improving our economic well-being and also to our environment was once considered the solution taking into account all aspects of the problem. Now this is called circular economy”. Nowadays, our model of mass production and consumption challenge in a dangerous limits and resources of the world and threatens the sustainability and stability through the prism of our own future as population. The economic factor of consumption based on the phrase “buy-use-throw“, which implies the existence of large quantities of raw materials, cheap and readily available, is about to reach its physical limits of sustainability. Circular economy appears to be an attractive alternative and viable, so large international companies, and also large organizations and interstate forums have already begun to consider and explore the concept.
Keywords: linear economy, circular economy, ecological footprint
Cuvinte cheie: economie lineară, economie circulară, amprentă ecologică
EFFECTS OF EXPOSURE TO POLLUTANTS
IN ENCLOSED SPACES
Air quality enclosed spaces such as schools, offices etc., and
influences in health workers of those spaces. Due to the presence of the
numerous sources of pollution inside/outside school and taking into account the
danger of volatile organic compounds on health, their study has become
important worldwide. In this context, management of indoor air quality in
schools must be maintained continuously for disease control and prevention
acute and chronic, particularly those related to chemical and biological pollution
Keywords: air pollution, volatile organic compounds
Cuvinte cheie: poluarea aerului, compuşi organici volatili
STUDIES AND RESEARCH ON THE SPECIAL FEATURES
OF BIODIVERSITY IN THE AREA OF THE RIVER BARZAVA
This paper presents the main features of biodiversity in the area
Bârzava evil. In several field campaigns were studied both vegetation and
fauna. The result of this research revealed that extibde always cultivated areas,
which negatively affects biodiversity.
Keywords: biodiversity, fauna vegetation
Cuvinte cheie: biodiversitate, faună, vegetație
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
RED IMPACT FROM SLUDGE PROCESS FOR THE
PRODUCTION OF ENVIRONMENTAL ALUMINEI Red sludge is a waste resulting from the Bayer process of refining bauxite to produce alumina. Red sludge is a waste strongly alkaline due to NaOH. Its composition depends on a number of factors but essentially the composition of the bauxite. Everything depends on the composition and quantity of bauxite red mud result: between 0.33 to 2 tons of red mud per tons of alumina produced or 0.4-2 tons of red mud per tons of alumina produced. The main environmental issue out of the sheer amount of red sludge produced is alkalinity. In paper presents analysis of the composition of this material particularly as regards the possibility of environmental pollution. Another factor that is useful to know in terms of environmental impact, especially in case of accidents knows the amount of acid required to bring the pH to a particular environmental acceptable values.
Keywords: red sludge, bauxite, waste alkaline
Cuvinte cheie: nămol roşu, bauxită, deşeu alcalin
THE RECICLYNG OF THE WASTES PROVIDED
OF AUTO BATTERIES IN LEAD GLASSES
The purpose of this paper was i) to obtained the lead glasses with the
xPb∙(100-x)PbO2 composition where x = 0-15mol % Pb by melt quenching
method and ii) to characterized of the structural and optical properties of the
obtained glasses by investigations of FTIR and UV-VIS spectroscopy in order
to possible applications in the auto battery recycling.
FTIR data show that the accommodation of the host glass with excess
of metallic lead was possible by the conversion of some [PbO6] octahedral
structural units into [PbOn] structural units where n=3 and 4. Then, the increase
of the metallic lead high content in the matrix network will produce to the
deficiency of non-bridging oxygen’s and the formation of UV-VIS bands in
region centred at about 300nm which can be attributed to the electronic
transitions of the lead ions.
Keywords: lead-based bottles, car batteries, spectroscopy UV-VIS and
Cuvinte cheie: sticle pe bază de plumb, baterii auto, spectroscopie IR
şi UV-VIS, reciclare
METHODOLOGY FOR DETERMINING THE
CONCENTRATION OF PARTICULATE MATTER FROM
ATMOSPHERE IN CLUJ-NAPOCA CITY
The study presents an analysis of methods for determining particle
suspension in atmosphere for Cluj-Napoca city. It shows the sampling method
and ways how to choose areas depending on the nature of traffic sampling. It
shows the equipment used in measurements.
Keywords: Particulate matter, air pollution, determination the level of
Cuvinte cheie: particule materiale, poluarea aerului, dereminarea
nivelului de poluare a aerului
STUDIES AND RESEARCH ON DETERMINING
AIR QUALITY IN CLUJ-NAPOCA CITY
This paper presents a series analysis of pollutants from urban
environment, respective to Cluj-Napoca city. It insisted on greenhouse
gas, gas that generates acid rain, as well as particulate matters.
Measurement were analysed and centralized to see in time the
evolution of these emissions.
Keywords: air quality, factors of air polluting
Cuvinte cheie: calitatea aerului, determinarea factorilor poluanți
METHODOLOGY FOR DETERMINING THE
CONCENTRATION OF PARTICLE IN ATMOSPHERE
This paper presents a series of results for determining air quality in
Cluj-Napoca area. The measurements were aimed primarily for determination
of particulate matter using modern equipment to determine aerosols. For
determinations were chosen areas where is intense traffic.
Keywords: particulate matter, determining aerosol, means for
Cuvinte cheie: particule in suspensie, determinare aerosolilor, metode
ENVIRONMENTAL QUALITY CENTRAL AREA
Setting emission sources, their values, substances that are
discharged, the effect of substances on the environment, are issues before the
establishment of measures to be taken to reduce or eliminate pollutant
emissions. Determination of pollutant emissions and assessing the degree of
pollution in a uniform manner in all European Community countries must use a
single method of calculating the level of pollution. Monitoring of environmental
factors on agglomeration is important because it highlights the level of pollution
in a city, established source of pollution and may recommend appropriate
measures for its reduction.
Cuvinte cheie: poluare, valoare medie tolerabilă, valoare limită
tolerabilă, măsurători, pulberi în suspensie, gaze, monitorizare, factori de mediu
THERMAL AND CHEMICAL DEPOLLUTION FOR EMISSIONS
RESULTED FROM INDUSTRIAL THERMAL PROCESSES
Due to the Climates Changes Intergovernmental Comity (IPCC)
investigations, carbon dioxide is the most significant emitted warm effect gaze
from human activity. CO2 emitted quantity must be reduced and even stopped
regarding to the global treaties. Carbon dioxide concentration and recuperation
from thermal installation emitted gazes is the first major step in carbon dioxide
problem resolution. This desiderative cold be resolved thru vacuum absorption
(VSA) using molecules or absorbents for CO2 suppression from eliminated
gazes from thermal aggregates.
Cuvinte cheie: captare CO2, depoluare termică, depoluare chimică
THE IMPACT OF MODERN TECHNOLOGIES ON THE PULP
FABRICATION PROCESS AT SC SOMES SA DEJ
The present article discuss the impact of some modern technologies
on the fabrication process of the pulp at SC Somes SA Dej and the reduction of
environmental impact of polluting technologies.
Cuvinte cheie: autoclavă de lemn, sticlărie laborator, instalaŃii de
THEORETICAL CONSITERATIONS OF BIOLOGICAL
TREATMENT IN WASTEWATER
The article presents theoretical considerations about the role of
microorganisms in the biological wastewater treatment, as an advance water
treatment method, in the vision of sustainable development.
Cuvinte cheie: microorganisme, tratament biologic, proces biologic,
tratarea apelor uzate
BIOFILTER CONSTRUCTION AND FUNCTION USED IN
WASTEWATER TREATMENT PROCESSES
The article presents dates and methods about utilization biofilters in
order to improve the quality of wastewater treatment processes on waste
water treatment plants.
Cuvinte cheie: biofiltre, reactoare biologice, filtrelor de contact,
procesul de tratare a apelor uzate
WASTEWATER TREATMENT PROCESSES EFFICIENCY
WHIT USING OF POLIENZYMATICS MIXTURES
Enzyme treatment involves the dramatic acceleration of natural
biodegradation. Specific enzymes introduced into a lake environment will
immediately start to breakdown complex compounds into simpler
compounds that bacteria can rapid digest.
Cuvinte cheie: eficientizare, epurare, uzate, amestecuri polienzimatice
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
ISSUES REGARDING THE TRANSFER OF MODELLING
LIQUID TO WATER FILTRATION THROUGH A SAND FILTER
This paper brings study of hydrodynamic filtration laws and their
mathematical equations. Hydrological problems are formulated according
deterministic and stochastic methods. Modelling principles are presented for
solving specific hydrological issues.
Cuvinte cheie: legea lui Darcy, starea de echilibru, flux saturat, flux
tranzitoriu saturat, principii de modelare
Keywords: Darcy’s law, steady-state saturated flow, transient saturated
flow, modelling principles
RECOVERY OF HEAT INDUSTRIAL WASTEWATER
Secondary energy resources (RES) with low thermal potential such as
heat from industrial wastewater and exhaust flue gases have substantial energy
content. The current trend to recovery of this RES consist of develop to
researches and plants for electrical power. This paper presents the current
state of energy conversion using organic Ranking cycle (ORC).
Cuvinte cheie: ape uzate industriale, ciclul organic Rankine, resursă
energetică secundară, conversie energie termică, potenţial termic redus
Keywords: industrial wastewater, organic Ranking cycle, secondary
energy source, converting heat, low grade waste heat