Chemistry Journal of Moldova

Ecological chemistry

THE IMPACT OF THE TREATMENT WITH CÂMPENI RED PETROLEUM ON A XVIII-TH CENTURY ICON

Author(s):

Cosmin-Tudor Iurcovschi, Marius Munteanu, Cristiana Manea (Amariei), Maria Modesta Lupașcu, Irina Crina Anca Sandu, Viorica Vasilache, Ion Sandu


Field: Ecological chemistry
Type: Research paper
Issue: 2017 Volume 12, no.1
Pages: 53-60
Keywords: old icon, conservation state, preservation, restoration.
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DOI: dx.doi.org/10.19261/cjm.2017.406
 
Abstract (PDF)
Graphical Abstract:
This paper presents the study regarding the impact of the treatment with Câmpeni red petroleum on an eighteenth-century icon made of wood, with the aim of active preservation and restoration. In accomplishing this endeavour, there were applied non-invasive techniques of analysis based on optical microscopy (OM), Scanning Electron Microscopy (SEM) coupled with Energy Dispersive X-ray analysis (EDX), micro-FTIR and colorimetry CIEL*a*b*. A series of chemical, physical-structural and mechanical characteristics of the wood were traced, in order to assess the degree of preservation enhancement as a result of the applied treatment.

Downloads: 48

NEW COMPOSITE SORBENTS FOR CAESIUM AND STRONTIUM IONS SORPTION

Author(s):

Mykola Kartel, Vita Galysh


Field: Ecological chemistry
Type: Research paper
Issue: 2017 Volume 12, no.1
Pages: 37-44
Keywords: lignocellulose-inorganic sorbent, caesium ion, strontium ion, sorption efficiency, distribution coefficient.
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DOI: dx.doi.org/10.19261/cjm.2017.401
 
Abstract (PDF)
Graphical Abstract: 
Composite lignocellulose-inorganic sorbents derived from plant residues of agriculture and food industry, modified with ferrocyanides of d-metals and hydrated antimony pentoxide were prepared. Caesium and strontium ions removal from water was tested by radiotracer method. Sorption of heavy metal ions, methylene blue, gelatin, vitamin B12 was also studied.

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REMOVAL EFFICIENCY OF CONSTRUCTED WETLAND FOR TREATMENT OF AGRICULTURAL WASTEWATERS

Author(s):

Michal Šereš, Tereza Hnátková, Jan Vymazal, Tomáš Vaněk


Field: Ecological chemistry
Type: Research paper
Issue: 2017 Volume 12, no.1
Pages: 45-52
Keywords: constructed wetland, agriculture wastewater, hybrid systems, horizontal filter, vertical filter.
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DOI: dx.doi.org/10.19261/cjm.2017.403   
 
Abstract (PDF)
Graphical Abstract: 
This study describes performance of a hybrid constructed wetland (CW) for treating wastewater from small farm in Czech Republic. TheCW consisting of two horizontal filters, one vertical filter and three shallow pondsand reduced inflow values of 25.400 mg/L COD and 2.640 mg/L BOD5 by up to 99%.

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EFFECT OF COPPER CONCENTRATION ON THE GROWTH OF METHYLOCOCCUS CAPSULATUS (STRAIN М)

Author(s):

Lidia Avdeeva, Rudolf Gvozdev


Field: Ecological chemistry
Type: Short communication
Issue: 2017 Volume 12, no.1
Pages: 110-114
Keywords: copper, biosorption, Methylococcus capsulatus, methanobactin.
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DOI: dx.doi.org/10.19261/cjm.2017.404  
 
Abstract (PDF)
Graphical Abstract: Growth of Methylococcus capsulatus (M) under different copper content in the growth medium has been studied. Excess of copper is sorbed in cytoplasm and on the cell surface. Growth of M. capsulatus (М) under copper-limited and copper-excess growth conditions is accompanied by increase of methanobactin secretion into the growth medium.

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PROCESSES UNDERLINING THE ACTION OF PESTICIDES ON ECOSYSTEMS AND HUMAN ORGANISM

Author(s):

Elena Saratovskikh


Field: Ecological chemistry
Type: Review
Issue: 2017 Volume 12, no.1
Pages: 20-28
Keywords: pesticides, adenosine triphosphate, NADH-oxidoreductase, nucleotides.
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DOI: dx.doi.org/10.19261/cjm.2017.393
 
Abstract (PDF)
Graphical Abstract:
 This article is devoted to the study of the mechanism of action of pesticides as compounds with a high complexing capacity for metals, nucleotides and enzymes. The sum of these effects is the cause of almost all diseases of modern man, and including - cancer. It is very necessary to ban the use of pesticides to save our world, ecosystems and human and the population health improvement.

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ACUTE CHEMICAL POISONINGS IN THE REPUBLIC OF MOLDOVA: 5 YEARS REVIEW

Author(s):

Iurie Pinzaru, Tatiana Manceva, Raisa Sircu, Ion Bahnarel, Elena Sanduleac


Field: Ecological chemistry
Type: Research paper
Issue: 2017 Volume 12, no.1
Pages: 29-36
Keywords: acute chemical poisonings, chemical substances type, poisoning incidence.
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DOI:
dx.doi.org/10.19261/cjm.2017.399 
 
Abstract (PDF)
Graphical Abstract: 
The incidence and the type of acute chemical poisoning in Republic of Moldova during 2011-2015 were assessed. Records show 22458 cases of poisonings, including 919 death cases. The analysis of poisoning cases involving various types of chemical substances causing the intoxication reveals that the medicines-related poisoning accounts for the highest record of cases (6971), followed by alcohol poisoning, 6556 cases, gas poisoning is the third, with 1860 cases, and pesticide-related poisoning, with 707 cases. Age and gender characteristics of chemical poisonings and ways of exposure to chemicals are discussed.


 

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ADSORPTION OF STRONTIUM IONS FROM WATER ON MODIFIED ACTIVATED CARBONS

Author(s):

Mihai Ciobanu, Victor Botan, Tudor Lupascu, Tatiana Mitina, Maria Rusu


Field: Ecological chemistry
Type: Research paper
Issue: 2016 Volume 11, no.2
Pages: 26-33
Keywords: adsorption, strontium ions, modified activated carbon.
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DOI:
dx.doi.org/10.19261/cjm.2016.11(2).01
 
Abstract (PDF)
Graphical Abstract: Adsorption of strontium ions from aqueous solutions on active carbons CAN-7 and oxidized CAN-8 has been studied. Obtained results showed that the adsorption isotherms for strontium ions from aqueous solutions are well described by the Langmuir and Dubinin-Radushkevich equations, respectively. The surface heterogeneity of activated carbons CAN-7 and oxidized CAN-8 has been assessed by using Freundlich equation.

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SEASONAL CHANGES OF MACRO- AND MICROELEMENTS CONTENT IN SOILS OF GREEN TEA FARMING FROM RIZE (TURKEY)

Author(s):

Fatih İslamoğlu, Özlem Buçan, Oktay Torul, Naciye Erdoğan


Field: Ecological chemistry
Type: Research paper
Issue: 2016 Volume 11, no.2
Pages: 34-45
Keywords: soil samples, macroelements, microelements, pH, organic matter.
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DOI:
dx.doi.org/10.19261/cjm.2016.11(2).12
 
Abstract (PDF)
Graphical Abstract: During of 2014 year, 60 soil samples at the point of 30 soil samples in the spring and 30 soil samples in autumn were taken from the locality of Fındıklı, Pazar and Sabuncular, where cultivation of green tea has been made in Rize (Turkey). The value of pH, organic matter content, and macro- and microelements amount were determined in sampled soils and the seasonal changes were investigated.

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ANTIOXIDANT AND ANTIMICROBIAL PROPERTIES OF STEVIA LEAVES EXTRACTS AND SILVER NANOPARTICLES COLLOIDS

Author(s):

Iryna Laguta, Teteiana Fesenko, Oksana Stavinskaya, Oksana Dzjuba, Lesya Shpak


Field: Ecological chemistry
Type: Research paper
Issue: 2016 Volume 11, no.2
Pages: 46-51
Keywords: Stevia leaves extract, silver nanoparticles colloid, antioxidant activity, antimicrobial properties.
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DOI:
dx.doi.org/10.19261/cjm.2016.11(2).08
 
Abstract (PDF)
Graphical Abstract: Stevia rebaudiana (Bertoni) extracts prepared from various types of raw material (leaves of plants grown ex situ and in vitro and callus culture) were found to contain different amounts of bioactive substances and differ from each other by antioxidant/reducing and antimicrobial properties and by activity in synthesis of silver nanoparticles colloids.


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ECOLOGICAL POTENTIAL OF SURFACE WATERS IN NATURAL SCIENTIFIC RESERVE “LOWER PRUT”

Author(s):

Maria Sandu, Anatol Tarita, Raisa Lozan, Natalia Zgircu, Elena Mosanu, Tatiana Goreacioc, Alexandru Zlotea, Anna Comarnitchi, Iulia Sidoren, Sergiu Turcan, Adrian Tarita


Field: Ecological chemistry
Type: Research paper
Issue: 2016 Volume 11, no.1
Pages: 21-26
Keywords: Lake Beleu, self-purification capacity, nitrification process, BOD5 , COD-Cr.
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2016.11(1).02

Graphical Abstract: 
The research results have marked a low value of the self-purification capacity for Beleu Lake water, between 0.12 and 0.19, which is of 1.2-2 times smaller than the one from Prut River (0.25), correlating positively with the values of BOD5, COD-Cr and the time of biochemical oxidation of ammonium ions. The evolution of stage NH4+(NH3) → NO2- in the process of nitrification in lake water in November 2014 takes place about 25 days and the process NO2- → NO3- is more than 35 days, the duration about 2 times higher than in lake water stages from 2015 and 2.8-3.0 times higher than that of the model with water from Prut River.

Downloads: 75