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DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

DEPENDENCE OF SUFFOSION STABILITY OF SANDY SOILS OF VARIOUS GENESES ON THE TYPE OF FILTRATE

Vestnik MGSU 5/2012
  • Potapov Ivan Aleksandrovich - Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy engineer, Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy, ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Shimenkova Anastasiya Anatol'evna - Moscow State University of Civil Engineering (MGSU) engineer, Department of Engineering Geology and Geoecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Potapov Aleksandr Dmitrievich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Head, Department of Engineering Geology and Geoecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 79 - 86

Results of calculations and experimental researches of suffosion stability of sandy soils are provided in the article. The authors have assessed the prospects for the application of standard methodologies to demonstrate the need to take account of the filtrate properties in the course of projecting potential suffusion process development patterns typical for sandy soils. The principal attention must be driven to the value of the kinematic viscosity of filtered liquids. Any assessment of filtration-related interaction of the flow of liquid with sandy soils must be backed by the gradation analysis of soils and the analysis of their homogeneity, as well as the mineralogical and morphological analysis. The morphological study of sands of various geneses, performed hereunder, is based on the methodology that takes account of both the shape of sand particles and the structure of their surface.
The proposed methodology makes it possible to assess extensive sand specimen rather than separate sand particles to assure the representative sampling to assure the accuracy of the morphological analysis. The authors provide the data that cover the research of sands of various geneses demonstrating varied granulometric and mineral composition, as well as various morphological peculiarities of correlation with the filtrates that have different values of kinematic viscosity. The methodological research completed by the authors has indicated an urgent need to perform laboratory and field researches of suffosion instability of sandy soils in varied geoecological environments typical for urban lands exposed to anthropogenic pollutions.

DOI: 10.22227/1997-0935.2012.5.79 - 86

References
  1. Rekomendatsii po metodike laboratornykh ispytaniy gruntov na vodopronitsaemost’ i suffozionnuyu ustoychivost’. P 12-83 [Recommendations concerning the Methodology of Laboratory Testing of Waterpermeability and Suffosion Stability of Soils. P 12-83]. Leningrad, VNIIG [Institute Hydroproject], 1983.
  2. Spiridonov V.N. Gidravlicheskie kharakteristiki otkrytogo potoka v pronitsaemom rusle [Hydraulic Characteristics of an Open Stream in a Nontight Channel]. Moscow, Moscow Institute of Civil Engineering, 1985.
  3. Vil’ner Ya.M. Spravochnoe posobie po gidravlike, gidromashinam i gidroprivodam [Handbook of Hydraulics, Hydraulic Machines and Hydraulic Drivers]. Moscow, Mashizdat Publ., 1989.
  4. GOST 25100—95. Grunty. Klassifikatsiya. [All-Russian State Standard 25100—95. Soils. Classification]. Moscow, Gosstroy Publ., 1996.
  5. Potapov A.D. Morfologicheskoe izuchenie peskov razlichnogo genezisa v inzhenernogeologicheskikh tselyakh [Morphological Research of Sands of Various Geneses for Engineering Geology Purposes]. Moscow, PNIIIS [Production, Scientific and Research Institute of Engineering Surveying in Construction], 1982.

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NEW OPPORTUNITIES FOR CLARIFICATION OF INTENSELY COLORED FILTRATES OF SOLID WASTE LANDFILLS CONCURRENTLY WITH THEIR DECONTAMINATION USING LIMEMILK AND CALCIUM SALTS

Vestnik MGSU 8/2013
  • Potapov Aleksandr Dmitrievich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Head, Department of Engineering Geology and Geoecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Konygin Aleksandr Aleksandrovich - ECOTECH-MOSCOW Limited Liability Company principal specialist, ECOTECH-MOSCOW Limited Liability Company, 6/8 B. Pionerskaya st., Moscow, 115054, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 116-122

The authors studied the effect of the process parameters (pH, concentration of Ca2+) on precipitation of humic acids contained in the filtrate of solid waste in the process of its decontamination using lime. The content of contaminants in the filtrate was monitored through the employment of well-known methodologies using methods of optical molecular and atomic spectroscopy; pH values were monitored through the employment of the potentiometric method. In some cases, chemical oxygen demand was measured to identify changes of the content of organic substances in the solution. Concentration of humic substances was identified by measuring the absorption spectra in the UV and in the visible range and by applying the calibration curve. Samples of humic and fulvic acids produced by Ecoanalitika Open Joint Stock Company were used for benchmarking purposes.The optimal amount of lime milk for the purpose of precipitation of humic substances in the filtrate is equal to 24 g/l. It is proven that any further increase of the lime milk flow is limited by the increase of the residual calcium concentration in the purified solution. Consumption of lime milk in the course of clarification of filtrates may be reduced by sharing it with calcium salts. By adding 10% of calcium chloride to the lime milk content, lime milk consumption may be reduced by 50%.

DOI: 10.22227/1997-0935.2013.8.116-122

References
  1. Konygin A.A., Skvortsov L.S., Seliverstov A.F. Ochistka fil'trata poligonov zakhoroneniya tverdykh bytovykh otkhodov [Treatment of Filtrate of Waste Landfills]. Vodosnabzhenie i kanalizatsiya [Water Supply and Wastewater Disposal]. 2010, no. 1–2, pp. 124—127.
  2. Goncharuk V.V., Shkavro Z.N., Kucheruk D.D. Kompleksnaya ochistka stochnykh vod svalok tverdykh bytovykh otkhodov [Integrated wastewater treatment of municipal solid waste landfills]. Khimiya i tekhnologiya vody [Chemistry and Technology of Water]. 2007, vol. 29, no. 1, p. 55—66.
  3. Wilson A.L. J. Analytical Aspects of Chemically Modified Electrodes: Classification, Critical Evaluation and Recommendations. Appl. Chem. 1960, vol. 10, 377 p.
  4. Potapov P.A., Pupyrev E.I., Potapov A.D. Metody lokalizatsii i obrabotka fil'trata poligonov zakhoroneniya tverdykh bytovykh otkhodov [Methods of Containment and Processing of the Filtrate of Solid Waste Landfills]. Moscow, ASV Publ., 2004, 168 p.
  5. Stir E., Fisher M. Posobie spetsialista po ochistke stokov [Manual for Wastemater Treatment Specialists]. Warsaw, Zaydel'-Pzhivetski publ., 2002, 406 p.

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