Chemistry Journal of Moldova

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.


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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.


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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".



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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.



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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.





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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.


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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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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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