Chemistry Journal of Moldova

Ecological chemistry

STUDYING THE RESEARCH RESULTS REGARDING FERTILIZERS USED IN THE REPUBLIC OF MOLDOVA

Author(s):

T. Leah, I. Povar, T. Lupascu, S. Andries, V. Filipciuc


Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.1
Pages: 14-22
Keywords: active substance, fertilizer, humus balance, pollution, soil protection.
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2013.08(1).02

Graphical Abstract: 
This paper represents an analysis of the research concerning the use of fertilizers and nutrients balance in the soils of the Republic of Moldova. The nature and effectiveness of fertilizers, their influence on the agrochemical properties of soils, the protection of the environment from the pollution by nutrients in addition to the regulatory normatives of our country developed in order to determine the necessary in fertilizers for obtaining the expected crops have been as well discussed.

Downloads: 30

CHEMICAL COMPOSITION FROM THE DNIESTER RIVER TRIBUTARIES

Author(s):

V. Gladchi, Gh. Duca, N. Goreaceva, E. Bunduchi, A. Lis


Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.1
Pages: 23-32
Keywords: tributary, chemical composition, flow rate, mineralization, redox state.
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DOI:
dx.doi.org/10.19261/cjm.2013.08(1).03

Graphical Abstract:
This article presents the results obtained in the framework of the project 09.832.08.06A. The role of the tributaries on formation of the Dniester river water and the study of the waters quality of sources / fountains in the catchment area of the Dniester river  as sources of water supply and for irrigation in the State Program, Scientific Researches and of the management of waters quality.

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ECOLOGICAL PECULIARITIES OF COPPER CHEMICAL FORMS CONTENT IN THE ERODED SOILS

Author(s):

T. Leah


Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.1
Pages: 33-36
Keywords: agriculture, chemical forms, copper, soil, transformation.
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2013.08(1).04

Graphical Abstract: 
The content of chemical forms of copper, the features of the distribution and transformation in eroded Gray soils and Calcareous chernozems are presented. Erosion process led to increase the chemical forms associated with clay minerals, carbonates, oxides, and reducing the mobile and humus organic forms. The losses of copper in different chemical forms consist 35% from humus horizon of eroded soils.

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STUDY OF HYDROGEN SULFIDE REMOVAL FROM GRUNDWATER

Author(s):

T. Lupascu, M. Ciobanu, V. Botan, T. Gromovoy, S. Cibotaru, O. Petuhov, T. Mitina


Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.1
Pages: 37-42
Keywords: catalysts, hydrogen sulfide, adsorption/oxidation, hydrogen peroxide, sulfur, sulfate.
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DOI:
dx.doi.org/10.19261/cjm.2013.08(1).05

Graphical Abstract:
 The process of the hydrogen sulfide removal from the underground water of the Hancesti town has been investigated. By oxygen bubbling through the water containing hydrogen sulfide, from the Hancesti well tube, sulfur is deposited in the porous structure of studied catalysts, which decreases their catalytic activity. Concomitantly, the process of adsorption / oxidation of hydrogen sulfide to sulfate take place. The kinetic research of the hydrogen sulfide removal from the Hancesti underground water, after its treatment by hydrogen peroxide, proves greater efficiency than in the case of modified carbonic adsorbents. As a result of used treatment, hydrogen sulfide is completely oxidized to sulfates.

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STUDY OF PROCESSES OF ACTIVATED CARBON OBTAINING FROM WOOD CHARCOAL

Author(s):

S. Cibotaru


Field: Ecological chemistry
Type: Research paper
Issue: 2012 Volume 7, no.2
Pages: 93-97
Keywords: wood charcoal, physico-chemical activation, activated carbons, pore volume, specific surface area.
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Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2012.07(2).09

Graphical Abstract:
 This paper presents the results of scientific research aimed at studying processes of obtaining activated carbon from wood charcoal. We presented methods for determining the structure parameters and specific surface of carbonic adsorbents. Scientific research results allow concluding that wood charcoal is a cheap and effective material for the synthesis of activated charcoal.

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THE STUDY OF CHEMICAL COMPOSITION AND EVALUATION OF GROUNDWATER QUALITY IN SOME REGIONS OF MOLDOVA

Author(s):

T. Mitina, N. Bondarenco, O. Bunciuc


Field: Ecological chemistry
Type: Research paper
Issue: 2012 Volume 7, no.2
Pages: 89-92
Keywords: drinking water, wells, chemical composition, maximum allowable concentration.
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Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2012.07(2).10

Graphical Abstract:
 The paper presents the results of groundwater study from different sources, selected in v. Myndreshty, Telenesti district, in various villages of Cahul district and in artesian wells in and around Chisinau. Large differences were evidenced in water chemistry in different villages of one district, as well as within the same village. Was assessed thee compliance of analyzed water to quality requirements of drinking water.

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POLLUTED IRRIGATION WATERS AS A RISK FACTOR TO PUBLIC HEALTH

Author(s):

A. Saghatelyan, L. Sahakyan, O. Belyaeva


Field: Ecological chemistry
Type: Research paper
Issue: 2012 Volume 7, no.2
Pages: 84-88
Keywords: heavy metals, irrigation water pollution, soil pollution, crops pollution.
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DOI:
dx.doi.org/10.19261/cjm.2012.07(2).11

Graphical Abstract:
 


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USE OF BACTERIA AND MICROALGAE IN SYNTHESIS OF NANOPARTICLES

Author(s):

Inga Zinicovscaia


Field: Ecological chemistry
Type: Review
Issue: 2012 Volume 7, no.2
Pages: 32-38
Keywords: nanotechnology, bacteria, microalga, nanoparticles, silver, gold.
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Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2012.07(2).16

Graphical Abstract:
 A critical need in the field of nanotechnology is the development of a reliable and eco-friendly process for synthesis of metallic nanoparticles. A number of different organisms, including bacteria, microalgae, yeast and fungi, have shown their ability to produce metal nanoparticles. But they have some drawbacks in providing better control over size distribution, shape and crystallinity. This review article presents an overview of microorganisms (bacteria and microalga) capable of producing silver and gold nanoparticles. This article is an extended abstract of a communication presented at the Conference Ecological Chemistry 2012.

Downloads: 53

A REVIEW OF BIOSORPTION OF CHROMIUM IONS BY MICROORGANISMS

Author(s):

Inga Zinicovscaia


Field: Ecological chemistry
Type: Review
Issue: 2012 Volume 7, no.2
Pages: 27-31
Keywords: chromium, biosorption, bacteria, microalgae, fungi.
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Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2012.07(2).17

Graphical Abstract:
 Due to its widespread industrial use, chromium has become a serious pollutant in diverse environmental settings. The main source of chromium pollution including the Republic o Moldova is industry. It is a great need to develop new eco-friendly methods of chromium removal. Biosorption of heavy metals is a most promising technology involved in the removal of toxic metals from industrial waste streams and natural waters.
This article is an extended abstract of a communication presented at the Conference Ecological Chemistry 2012.

Downloads: 25

MERCURY ADSORPTION BY ARTHOBACTER GLOBIFORMIS AND SPIRULINA PLATENSIS

Author(s):

T. L. Kalabegishvili, I. Murusidze, D. T. Pataraya, E. Ginturi, M. V. Frontasyeva, E. I. Kirkesali, Gh. Duca, I. Zinicovscaia


Field: Ecological chemistry
Type: Review
Issue: 2011 Volume 6, no.1
Pages: 6-9
Keywords: Langmuir-Freundlich model, Arthrobacter globiformis, Spirulina platensis, biosorption, mercury, neutron activation analysis.
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DOI:
dx.doi.org/10.19261/cjm.2011.06(1).01

Graphical Abstract:
 The increasing contamination of soil, sediment, and water with heavy metals by natural and industrial processes is a worldwide problem. Many bacteria and microalgae have demonstrated ability to absorb toxic elements. To study mercury biosorption by bacteria Arthrobacter globiformis and microalga Spirulina platensis neutron activation analysis (NAA) was applied. The process of mercury biosorption by these media was described by Freundlich and Langmuir-Freundlich Model. Both microorganisms showed a great potential to be used as biosorbing agents for mercury removal from the environment.

Downloads: 22