Chemistry Journal of Moldova

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: 26

Downloads: 33

Abstract (PDF)

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: 36

Downloads: 16

Abstract (PDF)

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: 39

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

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: 32

Downloads: 26

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

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