scientific journal
  • ISSN 2072-8158
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  • Урал-Пресс: 012688

Journal «Water: chemistry and ecology» № 2 (8) за February 2009 г.</H3>

Journal «Water: chemistry and ecology»


№ 2 (8) за February 2009 г.

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Contents:

p. 2-7 /

Lancova I.V.

Recreational use of water as a factor to control water quality

Tourism and recreation are playing more important role in the economy of many countries. The most popular objects in terms of recreation are water bodies. The issue of protecting water and territorial complexes featuring recreational water use requires a differentiated approach, because all types of recreation differ in composition, volume and pathways behind water pollution agents. The ways to reduce the negative impacts of recreational water use on water quality in water objects were examined.


p. 8-12 /

Proskurina I.V.

Evaluation of groundwater protection status using GIS technologies

The article addresses the modelcartographic method to develop groundwater security and exposure maps using GIS technologies in several parts of the Bryansk region. The protection of groundwater from pollution by heavy metal and radionuclides was evaluated. The maps developed can form an integral part in a map package to be used in choosing and justifying mathematical models of pollutant pathways, as well as subsequent forecast of pollutant migration inside the protection zone and in groundwater.


p. 13-16 /

Laptev A.G.
Demidova Yu.M.
Shinkevich E.O.

Improving the quality of electrochemical water desalination through monitoring carbon dioxide concentration

Theoretical and experimental studies were conducted to clarify the influence of dissolved carbon dioxide on water softening degree using the diaphragm electrolysis installation. The results obtained indicate the potential experimental increase in degree of electrochemical water softening due to saturation of the water treated by carbon dioxide and acceleration of the mechanism of forming a hardly soluble calcium carbonate.


p. 22-27 /

Nikolaev Yu.A.
Kolbasov G.A.
Kazakova E.A.
Dorofeev A.G.
Aseeva V.G.

The method to determine mechanical strength of floccules and granules of active sludge

A method to determine the mechanical strength of the structural units in active sludge – floccules and granules – that is used in treatment plants was developed. The method is based on determining the strength characteristics of active sludges to the active shear force of rotating blade and strongly perturbed fluid under conditions closely modeling the natural factors destroying floccules and granules in active sludge. The method developed allows evaluating the degree of destruction of the sludge fractions expressed as the fraction of initial active sludge mass.


p. 28-34 /

Tartakovskij I.S.

Monitoring and control of potentially hazardous water objects as the main way to prevent legionellosis

The key aspects of legionella ecology that control the development of infectious human pathology are examined under conditions of the postindustrial society. The formation of legionella biofilms in potentially hazardous water bodies featuring a chance of subsequent aerosol and/or respiratory transmission of the aspirating transfer of the pathogenic agent can lead to major epidemic outbreaks and sporadic morbidity cases. Based on international experience and results of the authors’ investigations the modern concept to prevent legionellosis is put forward based on microbiological monitoring and controlling the potentially hazardous water objects.


p. 35-38 /

Barabanova V.D.
Denisov S.S.

GMP and water quality in production of medicines

In the pharmaceutical and biological industries water is widely used in many processes that require complying with high standards of water quality. The article provides comparative characteristics of the requirements towards pharmaceutical water quality standards that are effective in Russia, USA and EU.


p. 39-42 /

Melnikov I.O.
Busygina N.S.
Tripolskaya T.A.

Studies on the active oxygen release dynamics under dissolving calcium peroxide

In this article the dynamics of releasing active oxygen from peroxides of alkaline earth metals is studied using calcium peroxide as an example. It was shown that under different conditions calcium peroxide allows generating hydrogen peroxide in solution in concentration range of 0.03-2.00 g/l; the concentration of oxygen is within 0.010-0.035 g/l. Above concentrations are maintained over a long period of time.