Tag:toxicity

№6|2011

WASTEWATER TREATMENT

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UDC 628.349.087.5

IVKIN P. A., KAZAKOV A. V., BELEVCEV A. N., ZHAVORONKOVA V. I., BAJKOVA S. A., MELNIKOVA N. N.

Test of Technology of Galvanochemical Wastewater Treatment for Arsenic Compounds

Summary

The substantiation of perspectivity of application of the galvanochemical method of arsenic removal from wastewater is made. Results of the laboratory study of efficiency of galvanochemical treatment of arsenic-containing model solutions and natural wastewater of an intergrated copper-sulphur plant are presented. It is shown, that application of this technology makes it possible to remove arsenic up to values of Maximum Permissible Concentration (MPC) for water objects. Efficiency and arsenic removal rate depend insignificantly on an initial pH value (in the range of 1,5–9,5). Duration of the galvanochemical treatment ensuring the obtaining of arsenic residual concentrations on a level with MPC depends on its initial concentration in media treated and on a galvanic couple used. The process of arsenic removal progresses with a higher rate when an «iron – copper» galvanic couple is used. When an «iron – crushed coke» galvanic couple is used the duration of treatment necessary for obtaining the arsenic concentration on a level with MPC increases in 2–3 times. Basic flow charts of the galvanochemical treatment of wastewater depending on the initial concentration of arsenic are offered.

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№2|2019

DRINKING WATER SUPPLY

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UDC 628.1.032

Chesnokova S. M., Savel'ev O. V.

Estimation of water quality in decentralized water supply sources of Vladimir

Summary

The effect of drinking water chlorination on its organoleptic properties posing a threat to the public health is considered. The water sanitary measurements, the compliance with the requirements to its physiologic adequacy, integral toxicity of the water in the decentralized water supply sources of Vladimir were studied. It was stated that water in all three investigated objects used by the population as alternative drinking water sources was physiologically adequate in relation to the concentration of macroelements and complied with the sanitary chemical requirements of SanPiN 2.1.4.1074-01. As for the concentration of microelements (fluorine and iodine) water in all the investigated objects was not physiologically adequate and did not meet the sanitary and hygienic requirements. The concentration of fluorine in the investigated sources of decentralized water supply and in drinking water of the Nerlinskii water intake varied from 0.1 to 0.3 mg/dm3 what was much less than the lowest limit of the physiologic adequacy and MPC. Iodine in the investigated sources was not detected. In some springs and wells of Vladimir nitrates were detected in concentrations much higher than the MPCs for drinking water. Water in two springs in Vladimir showed hypotoxicity for small crustaceans Daphnia magna Sr. what evidenced the presence in them of trace concentrations of toxic substances hazardous to health.

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№1|2012

WASTEWATER TREATMENT

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UDC 628.316.6

SMIRNOV A. D., Bivalkevich A. I., Strelkov A. K., Breslov B. E.

Efficiency and economic expediency of the industrial methods for wastewater disinfection

Summary

Technical and economic assessment of municipal and industrial wastewater disinfection methods is given. At present the method of UV-disinfection with the use of low pressure amalgam lamps is recognized from both technical and economic points of view as a most acceptable method widely used all around the world. UV disinfection ensures most efficient inactivation of pathogenic microorganisms including chlorine-tolerant (viruses) present in effluents. UV irradiation of wastewater is not accompanied with formation of by-products that could produce negative impact on living organisms and human health, i. e. this method is both environmentally and hygienically safe.

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Российская ассоциация водоснабжения и водоотведения

Конференция итог

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