Chemistry Journal of Moldova

Ecological chemistry

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.
Full Text (PDF): Download

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.


Downloads: 33

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.
Full Text (PDF): Download

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.


Downloads: 15

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.
Full Text (PDF): Download

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.


Downloads: 38

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.
Full Text (PDF): Download

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.


Downloads: 36

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.
Full Text (PDF): Download

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.


Downloads: 30

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.
Full Text (PDF): Download

DOI:
dx.doi.org/10.19261/cjm.2012.07(2).11

Graphical Abstract:
 



Downloads: 24

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.
Full Text (PDF): Download

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: 59

Author(s):

Inga Zinicovscaia


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

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: 30

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.
Full Text (PDF): Download

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: 26

Author(s):

Angela Lis, Gheorghe Duca, Elena Bunduchi, Viorica Gladchi, Nelli Goreaceva


Field: Ecological chemistry
Type: Research paper
Issue: 2010 Volume 5, no.2
Pages: 30-36
Keywords: buffering capacity, acid-base balance, carbon system, humic system, stability to acidification.
Full Text (PDF): Download

DOI:
dx.doi.org/10.19261/cjm.2010.05(2).03

Graphical Abstract:
The current work represents the estimation of the buffering capacity on the Dniester River waters and its tributaries between November 2008 and October 2009.


Downloads: 21