ecoterra online Ro | En
Editorial board

Instructions for authors
 
Current number
Number 1(1-2)/2004
Number 1(3)/2004
Number 2(6)/2005
Number 2(4)/2005
Number 2(5)/2005
Number 2(7)/2005
Number 3(9)/2006
Number 3(8)/2006
Number 3(11)/2006
Number 3(10)/2006
Number 4(13)/2007
Number 4(12)/2007
Number 4(14)/2007
Number 4(15)/2007
Number 5(19)/2008
Number 5(16)/2008
Number 5(17)/2008
Number 5(18)/2008
Number 6(22-23)/2009
Number 6(21)/2009
Number 6(20)/2009
Number 7(24)/2010
Number 7(25)/2010
Number 8(29)/2011
Number 8(28)/2011
Number 8(27)/2011
Number 8(26)/2011
Number 9(33)/2012
Number 9(32)/2012
Number 9(31)/2012
Number 9(30)/2012
Number 10(34)/2013
Number 10(36)/2013
Number 10(35)/2013
Number 10(37)/2013
Number 11(4)/2014
Number 11(3)/2014
Number 11(2)/2014
Number 11(1)/2014
Number 12(4)/2015
Number 12(3)/2015
Number 12(2)/2015
Number 12(1)/2015
Number 13(1)/2016
Number 13(2)/2016
Number 13(3)/2016
Number 13(4)/2016
Number 14(4)/2017
Number 14(3)/2017
Numberl 14(2)/2017
Number 14(1)/2017
Number 15(1)/2018
Number 15(2)/2018
Number 15(3)/2018

FIRST PAGE ECOTERRA NUMBER 15(2)/2018


Ecoterra, 2018, 15(2):1-8
MAGNETITE UTILISATION FOR PURGING THE INDUSTRIAL WATERS POLLUTED BY HEAVY METALS
UTILIZAREA MAGNETITEI PENTRU PURIFICAREA APELOR INDUSTRIATE POLUATE CU METALE GRELE

Dumitru Vâju, Mihaela Hetvary, Daniela Maria Ignat, Gabriela Băisan, Daniela Stanciu
S.C. ICPE Bistriţa S.A., Bistriţa, Romania
Teodor Rebreanu
S.C. Betak S.A. Bistriţa, Romania

Seeing that water is a foremost environmental factor, its pollution is a topical problem, with serious consequences upon the health of the population and of the entire ecosystem, in general. Unlike part of the organic contaminants, the heavy metals are not biodegradable, therefore they tend to get accumulated in the living organisms. The heavy metals are extremely toxic, causing the inhibition of the cellular enzymatic processes or some other physiological disturbances. Certain industrial processes, such as the electrochemical coverage one, bring forth high concentrations of heavy metals in the discharged wastewaters. The paper sets out an innovating technology of purging the wastewaters derived from the galvanic covering processes. The high concentration of heavy metals in the wastewaters has caused the water purging process to be carried out in two stages. The former treatment stage includes such processes as pH adjustment, water oxygenation, electrochemical treatment, coagulation-flocculation and decantation. Since the concentration of the heavy metals in the water resulted from the first purging stage is higher than the maximum concentration allowed by the effective rules pertaining to the used industrial water discharge (as it cannot even be reused within the process), resorting to an advanced purging stage is called for. This one involves the utilisation of magnetite nanoparticles for adsorbing the metals at their surface and retrieving the magnetite-metal concentrated sludge, which is recirculated. The process is unfolded in multiple cycles and in the final stage the metals are removed from the magnetite by washing. The separation of the magnetite-metals solid phase from the water takes place in a magnetic module, where a solenoid fed by an electricity source generates a magnetic field. The magnetite-metals sludge gets agglomerated in the areas where the gradient of the magnetic field caused by the solenoid exceeds a threshold value, which can be reached by feeding the solenoid with continuous pressure of a certain value or with alternative voltage on a 0…500 Hz frequency range. The numerical shaping laid down in the paper for the magnetic module fed with direct and alternating current by using the COMSOL Multiphysics environment, shows the areas of agglomeration, being a useful instrument for designing the module at the industrial scale.


Ecoterra, 2018, 15(2):9-14
ENERGY STRATEGIES OF USING RENEWABLE ENERGY FOR SUSTAINABLE REGIONS
ENERGY STRATEGIES OF USING RENEWABLE ENERGY FOR SUSTAINABLE REGIONS

Andrada Oancea, Ildiko Tulbure
University „1 Decembrie 1918”, Alba Iulia, Romania

Renewable energy resources represent a source of inexhaustible energy, being not known until now that their usage will have not negligible negative environmental impact. They have become competitive energy resources from an economic point of view especially due to their diversity and availability. As a member of the European Union, Romania has assumed a number of aims and one of them is to increase to more than a quarter until the year of 2020 the share of renewable energy in electricity production. This means that national and regional strategies of using renewable energy resources are required to be established by respecting the general assumed objectives on European level. In this way, regions using renewable energy resources will make steps forward in the direction of becoming sustainable regions, at least from the point of view of covering the energy demand but without supplementary negative environmental impact. In order to emphasize the potential environmental impact of using renewable energy resources since a while on a global level their so-called “environmental footprint” is emphasised. Following this idea the current paper debates the establishing way of photovoltaic panel systems environmental footprint by calculating the corresponding CO2 emissions.


Ecoterra, 2018, 15(2):15-26
PHYTOREMEDIATION OF POLLUTED WATER FROM ROșIA MONTANă MINING AREA
FITOREMEDIEREA APELOR POLUATE DIN ZONA MINIERA ROSIA MONTANA

Alexandru Dan Petaca, Dana Malschi
Babeş-Bolyai University, Faculty of Environmental Sciences and Engineering, 30 Fântânele Str., 400294 Cluj-Napoca, Romania
Erika Levei
INCDO INOE 2000, Research Institute for Analytical Instrumentation, 67 Donath Str., 400293, Cluj-Napoca, Romania
Claudiu Tanaselia
INCDO INOE 2000, Research Institute for Analytical Instrumentation, 67 Donath Str., 400293, Cluj-Napoca
Carla Nicoară
Babeş-Bolyai University, Faculty of Environmental Sciences and Engineering, 30 Fântânele Str., 400294 Cluj-Napoca, Romania
Elena Rînba
Babeş-Bolyai University, Botanical Garden, 42 Republicii Str., Cluj-Napoca, Romania

Phytoremediation tests for heavy metals removal with aquatic species Lemna minor, Pistia stratiotes, Vallisneria spiralis, on contaminated acidic waters collected from Rosia Montana mining area, in 2016, were performed. The study was conducted in micro containers with contaminated water using constructed wetlands systems. Three types of experimental waters for each species have been used: drinking plain water as blank, drainage waters collected from Abrudel river downstream of Gura Rosiei tailings dump and from Saliste Valley downstream of Saliste tailings dump. Heavy metals concentrations were measured by inductively coupled plasma mass spectrometry using an ELAN DRC II (Perkin Elmer) spectrometer, and the water quality parameters (pH, Eh - oxidation-reduction potential, EC - electrical conductivity, TDS – total dissolved salts and S - salinity) were analyzed using a 320i multiparameter (WTW), before and after the phytoremediation process. During two weeks, the phytoextraction experiment with aquatic species (L. minor, P. stratiotes and V. spiralis) showed a significant decreases of heavy metals concentrations, with an efficiency of 6.54-25.80% for Pb; 9.85-66.29% for Al; 100% for Cd; 59.54-78.63% for Ni and 32.91-48.37% for Zn, in case of Abrudel river water, while in case of the water from Saliste Valley with significant decrease of Al (30.40%), Ni (21.10%), Pb (60.86%) and Fe (88.71%). Vallisneria spiralis has shown high phytoremediation efficiency by increasing pH (24.13%) and EC (3.36%). The promising results on phytoremediation of contaminated acidic drainage waters using aquatic species in constructed wetlands indicates the possibility of implementing this biotechnology.


Ecoterra, 2018, 15(2):27-33
THE USE OF GEOTHERMAL WATER IN THE CULTIVATION OF SOME ALGAE SPECIES: A REVIEW
UTILIZAREA APELOR GEOTERMALE LA CULTIVAREA UNOR SPECII DE ALGE

Sebastian Cristian Radu Plugaru, Viorel Dan, Timea Gabor, Xenia Paula Mentiu
Technical University of Cluj-Napoca, Faculty of Materials and Environmental Engineering, Cluj-Napoca, Romania

Green algae have been and are being studied because of their commercial importance as a source of essential amino acids, vitamins, fatty acids and proteins. Most cultural systems today are open ponds. In Europe, Poland has beneficial conditions for broad geothermal use, with one of the renewable and sustainable energy sources. Romania has a remarkable potential in terms of geothermal energy, being considered, after Greece and Italy, as having great opportunities to use geothermal resources. Only one city in the country, city of Beius, relies entirely on this type of heating energy for homes and has important projects to become a true geothermal ecological center. In the present study, geothermal water could be used to prepare the microalgal culture surrounding to heat greenhouses used to grow algae, and to dry the biomass obtained. The use of geothermal water offers the possibility of producing algae in open ponds covered with greenhouses and plant cultivation in winter. The obtained algae can be used for the production of bio-products, biogas, algae biodiesel, with potential for application in plant cultivation.


Ecoterra, 2018, 15(2):34-51
THE SELECTION OF SUITABLE FISHING GEAR FOR FISHERMEN IN MADURA ISLAND USING FUZZY AHP AND FUZZY TOPSIS
THE SELECTION OF SUITABLE FISHING GEAR FOR FISHERMEN IN MADURA ISLAND USING FUZZY AHP AND FUZZY TOPSIS

Heru Lumaksono
Department of Ship Building Engineering, Shipbuilding Institute of Polytechnic Surabaya, Surabaya, Indonesia
Hozairi
Department of Informatics Engineering, Islamic University of Madura, Pamekasan, Indonesia

Madura Island, whose majority of the people work as fishermen, has the potential to increase their productivity by recommending suitable fishing gear for their area. This research will give recommendation of suitable decision to choose fishing gear which have good selectivity and good productive, the method developed in this research is combination of Fuzzy AHP and Fuzzy TOPSIS method. Fuzzy AHP is used to determine the weight of predefined criteria and Fuzzy TOPSIS is used to rank alternative decisions. The results of the weighting criteria are: selectivity = 0.213, productivity = 0.190, environmental impact = 0.182, quality of catch = 0.147, not dangerous = 0.138 and cost = 0.129. The calculation results using Fuzzy TOPSIS obtained the priority of fishing gear suitable for fishermen in Madura Island as follows: fishing = 0.682, ground fish pots = 0.589, gill nets = 0.504, trawl= 0.411, lift net = 0.327 and purse seine = 0.318. The results of the implementation of Fuzzy AHP and Fuzzy TOPSIS methods will be taken into consideration for decision makers to assist fishermen and local government to develop a kind of fishing gear that suits the needs of the community, environmentally friendly and does not violate the law.


Ecoterra, 2018, 15(2):52-59
THE IMPACT OF AGRICULTURAL PRACTICES ON ENVIRONMENTAL COMPONENTS IN THE TRANSYLVANIAN PLAIN
IMPACTUL PRACTICILOR AGRICOLE ASUPRA MEDIULUI IN CAMPIA TRANSILVANIEI

Adrian Vodiță
Babeș-Bolyai University of Cluj-Napoca, Faculty of Geography, Department of Regional Geography and Territorial Planning, 5-7 Clinicilor str., 400006 Cluj-Napoca, Romania
Irina Raboșapca, Andras-Istvan Barta, Eduard Schuster
Babeș-Bolyai University of Cluj-Napoca, Faculty of Geography, Bistrița Academic Extension, 3-5 A. Mureșanu str., 420117 Bistrița, Romania

The landscapes have undergone changes over time due to human intervention. Even today, human activities are responsible for almost all landscapes transformation. This is how the agricultural cultural landscape emerged, as a result of plant cultivation and animal husbandry activities, followed by the forest cultural landscape, closely linked to the agricultural one. This article is tackling the evolution of agricultural landscape in the Transylvanian Plain and the way in which humans have shaped it thru different ages. Another important aspect discussed is the negative impact, which people have on the environment of the Transylvanian Plain in the pursuit of shaping landscapes after their will.


Copyright © Icpe Bistrita