Chemistry Journal of Moldova

Ecological chemistry

REMOVAL OF DIVALENT IRON AND MANGANESE IONS AND HYDROGEN SULFIDE FROM GROUNDWATER

Author(s):

Tudor Lupascu, Mihail Ciobanu, Victor Botan


Field: Ecological chemistry
Type: Research paper
Issue: 2014 Volume 9, no.2
Pages: 58-61
Keywords: divalent iron, divalent manganese, hydrogen sulfide, oxidation, coagulation
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(2).08

Graphical Abstract:
 Processes of removal of divalent ions of iron and manganese and hydrogen sulfide from groundwater at various pH values and temperature were studied. Obtained results have been used in order to elaborate a process of groundwater purification from the mentioned pollutants. The use of elaborated process for natural water leads to the decrease of the content of iron, manganese and hydrogen sulfide below the maximum allowable concentrations.

Downloads: 38

ACTIVATED CARBONS FROM VEGETAL RAW MATERIALS TO SOLVE ENVIRONMENTAL PROBLEMS

Author(s):

Viktor Mukhin, Tudor Lupascu, Nadejda Voropaeva, Yuriy Spiridonov, Nicolay Bogdanovich, Vasiliy Gur’janov


Field: Ecological chemistry
Type: Research paper
Issue: 2014 Volume 9, no.1
Pages: 33-36
Keywords: active carbon, vegetal raw byproducts, structural parameters, soil detoxification, water purification
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2014.09(1).03

Graphical Abstract:
Technologies for active carbons obtaining from vegetable byproducts such as straw, nut shells, fruit stones, sawdust, hydrolysis products of corn cobs and sunflower husks have been developed. The physico-chemical characteristics, structural parameters and sorption characteristics of obtained active carbons were determined. The ability of carbonaceous adsorbents for detoxification of soil against pesticides, purification of surface waters and for removal of organic pollutants from wastewaters has been evaluated. The obtained results reveal the effectiveness of their use in a number of environmental technologies.

Downloads: 64

EURASIAN MINERAL WATER: MATHEMATICAL MODELING, CLASSIFICATION AND ASSESSMENT OF THEIR IMPACT ON THE BIOCHEMICAL COMPOSITION OF HUMAN BLOOD

Author(s):

Nikolay Kornilov, Elena Kornilova, Elena Stepanenko


Field: Ecological chemistry
Type: Research paper
Issue: 2014 Volume 9, no.1
Pages: 37-41
Keywords: minerals water, blood, modeling, classification
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(1).04

Graphical Abstract:
 In the article the results of comparative analysis of the composition of the Eurasian hydromineral resources and the assessment of their impact on the physiological condition of a human organism according to biochemical studies of venous blood are presented. Processing of initial data on the composition and properties of mineral waters chloride-hydrocarbonate, sulphate- hydrocarbonate and chloride-sulphate types and venous blood are made using the method of mathematical modeling, developed by the authors of this article. It is shown that in the balneological impact of hydromineral resources on the body in the blood increases the hemoglobin and oxygen, decreases glucose, and acid-base pH shifted to high alkalinity.

Downloads: 40

EVALUATION OF WATER POLLUTION STATUS IN SIRET HYDROGRAPHICAL BASIN (SUCEAVA REGION) DUE TO AGRICULTURAL ACTIVITIES

Author(s):

Carmen Zaharia


Field: Ecological chemistry
Type: Research paper
Issue: 2014 Volume 9, no.1
Pages: 42-52
Keywords: agricultural activity, nutrient quality indicators, global pollution index, real pollution status, Siret River, Suceava County area
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(1).05

Graphical Abstract:
 The study presents data concerning the water pollution status of Siret hydrographical basin (i.e. surface and ground waters, lakes) in Suceava County area (different controlling/monitoring sections) due to agricultural productive activities, especially regarding some quality indicators (nitrogen-based nutrient concentrations) evaluated for 2008. These data are recommending the necessity of continuous monitoring of water quality in the Siret River hydrographical basin, in all existing control sections, for identification of any pollution episodes, non-reported by polluters to the local environmental regulators.

Downloads: 36

VALORIZATION OF LOW-COST NATURAL MATERIALS IN DEPOLLUTION PROCESSES OF WASTEWATER

Author(s):

Laura Bulgariu, Igor Cretescu, Dumitru Bulgariu, Matei Macoveanu


Field: Ecological chemistry
Type: Research paper
Issue: 2014 Volume 9, no.1
Pages: 53-58
Keywords: heavy metals, oils products, low-cost natural materials, peat moss, wastewater treatment
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(1).06

Graphical Abstract: 
In this paper, are presented the adsorptive characteristics of a low-cost material that are abundant in our region, namely: Romanian peat moss from Poiana Stampei (Romania), for the removal of different toxic heavy metal ions (Pb(II), Hg(II), Co(II) and Ni(II)) and oil products from aqueous media. The experiments have concerned the influence of several experimental parameters (initial solution pH, adsorbent dose, initial heavy metals concentration, contact time, and temperature) on the heavy metals and oil products removal efficiency. The most important conditions for desorption of heavy metal ions from loaded-materials, required for their regeneration are also presented.

Downloads: 38

QUANTIFICATION AND BIOREMEDIATION OF ENVIRONMENTAL SAMPLES BY DEVELOPING A NOVEL AND EFFICIENT METHOD

Author(s):

Mohammad Osama, Felicia Armstrong, Peter Norris, Habiba Tahira Hussain


Field: Ecological chemistry
Type: Research paper
Issue: 2014 Volume 9, no.1
Pages: 59-73
Keywords: ergosterol, cholesterol, gas chromatography-mass spectrometry (GC-MS), sediments, polycyclic aromatic hydrocarbons (PAHs), ergosterol extraction method
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DOI: 
dx.doi.org/10.19261/cjm.2014.09(1).07


Graphical Abstract:
 
Pleurotus ostreatus, a white rot fungus, is capable of bioremediating a wide range of organic contaminants including Polycyclic Aromatic Hydrocarbons (PAHs). Ergosterol is produced by living fungal biomass and used as a measure of fungal biomass. The first part of this work deals with the extraction and quantification of PAHs from contaminated sediments by Lipid Extraction Method. The second part consists of the development of a novel extraction method (Ergosterol Extraction Method), quantification and bioremediation.

Downloads: 43

THE WATER SPRINGS - SOURCES FOR WATER SUPPLY AND IRRIGATION IN THE NISTRU RIVER BASIN

Author(s):

Maria Sandu, Anatol Tarita, Raisa Lozan, Viorica Gladchi, Gheorghe Duca, Sergiu Turcan, Elena Mosanu, Afanasie Prepelita


Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 42-50
Keywords: groundwater, chemicals state, pollution sources, correlation of components, water type and qualification
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).04

Graphical Abstract:
In Memory of Valeriu Ropot for his scientific contributions in Waters Protection
The present study estimates chemical composition and status of the groundwater from the Dniester river basin. Research includes defining of springs/fountains location, evaluating physicochemical features of water, highlighting of main pollutants and pollution sources, establishing of water type and quality. The research was achieved within the State Program "Scientific research and water quality management".


Downloads: 43

HEAVY METALS AND PHOSPHORUS FORMS MOBILIZATION DURING RE-SUSPENSION OF BOTTOM SEDIMENTS OF THE PRUT RIVER

Author(s):

Larisa Postolachi


Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 51-56
Keywords: bottom sediments, re-suspension, the Prut River
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2013.08(2).05

Graphical Abstract:
 The results suggest that during the re-suspension, bottom sediments can become a relevant source of heavy metals and phosphorus forms which are mobilized in the water horizon overlying the bottom sediments.


Downloads: 23

DISTRIBUTION OF PHOSPHORUS FORMS IN “WATER-PARTICULATE MATERIALS-BOTTOM SEDIMENTS” SYSTEM OF THE PRUT RIVER DURING 2009-2012 YEARS

Author(s):

Larisa Postolachi, Vasile Rusu, Tudor Lupascu


Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 57-66
Keywords: bottom sediments, particulate materials, phosphorus forms, the Prut River
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DOI:
dx.doi.org/10.19261/cjm.2013.08(2).06

Graphical Abstract:
The supplemented scheme for determination of phosphorus forms in natural waters was tested for the River Prut.





Downloads: 21

BUFFER PROPERTIES OF SOIL MINERALS. PART 1. THEORETICAL ASPECTS

Author(s):

Povar Igor, Spinu Oxana


Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 67-72
Keywords: buffer action, complex formation, soil solution, solid phase, thermodynamic stability
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2013.08(2).07

Graphical Abstract:
The key quantitative characteristics of the theory of buffer action for polycomponent mono- and two-phase systems have been derived. It is shown, that the buffer properties in relation to the solid phase components are amplified with an increase of solubility due to protolytic or complex formation equilibria in saturated solutions.

Downloads: 24