No 8 (2014)
ENGINEERING SOLUTIONS
4-7 450
Abstract
There was examined the method of electrocoagulating water treatment, its advantages and disadvantages. There was developed a new advanced engineering solution on electrochemical coagulation method’s implementation that could reduce the influence of factors hampering the solution process of anodic material. There was ascertain that the effect of vibration on filtration process in the electrochemical coalesce gives a positive result, and increases the water purification’s degree. There was identified that vibration impact on the electrodes leads to an increase of power output of electric cell. The developed device is usefulness, and could be used for improving of industrial wastewater treatment technology.
8-13 505
Abstract
There were presented results of investigations concerning possibilities of tailing dump’s sands recovery. This tailing dump was formed in the consequence of industrial activity of zink-lead dressing mill. Gross recoverable value in the tailings have sulfides (average content of Pb – 0.21%, Zn – 0.50%, Au-0.17 g/t) and customer value – nonmetallic part (80-85% of quartz (up to 65%), feldspar, chlorites). Recovery of sulfides into marketable selective concentrates is realized in two stages: from tailings is recovered sulfide product that is reprocessed under technique of existing production together with ore or self-standing. Recovery sulfides from tailings are performed with the use of channel Hydrocyclone. On the base of theoretical study of boundary effect on the solid particles movement was recommended to set in the channels wafer packs in order to obtain fine grained working areas. Heavy fraction of hydroseparation was reprocessed according the schedule of Sheridan-Griswold into selective concentrates with high performance. Identifying feature of flotation schemes construction is jet countercurrent movement of feedstock (in the two cycles of flotation) and rough concentrate. There were developed specifications and formulation of manufacturing of quality product from nonmetallic part of tailings, i.e. silica brick, glass container, glass fiber, marbled glass. Results of investigations are proved possibility of full recovery of spoiled tailings of zink-lead mill that meets requirements of environmental rehabilitation of areas.
14-16 443
Abstract
There was presented some data on efficiency of cutterless refining of recycled pulp (secondary raw materials) as compared with other kinds of refining: cutter refining and with use of inertia blocks. There were presented anecdotal data on investigation of refining process, demonstrating applicability of cutterless refining in preparation of paper pulp and paths of improving of production’s environmental aspects (reduction of slime pulp entrainment into drain and substantia; decreasing of primary plant feedstock as commercial wood.
SCIENTIFIC DEVELOPMENTS
17-19 654
Abstract
There were investigated physico-chemical and absorption properties of new sorbent, that was obtained by means of mixing of fine-grained Portland cement -500, 100 g of gaize from Astrakhan Oblast with 100 cm3 of 10% aquatic solution of table salt and forming of pellets with desired size (from 0.5 to 5 cm diameter). Formed mass after setting and hardening was placed into current water, and cured so far as water had negative reaction on chloride-ion. After drying at 80-85oC pellets were placed into 40% aquatic solution of diethanol amine (DEA) during 1 hour, then pellets carried over on sieve, therewith removing excess of DEA, and pellets were predrying in free air (fan) at 20-40oC. Sorbent SV-DA was used for ambient air cleaning from acidic gases and water vapors, such as hydrogen sulfide, sulfur dioxide, carbon dioxide and microorganisms. Obtained results are testified high absorption properties of sorbent, allowing cleaning ambient air from acidic gases to level less than 0.01 MAC.
20-23 549
Abstract
There was investigated recovery of one from the most polluted effluent of oil and fat production – spent-soap lye with the use of renewable waste of vegetable origin, as exemplified by rice, buckwheat, soybean and sunflower peelings and their prepared samplings. The study of plant waste was conducted in comparison with sorbents of inorganic origin (vermiculite and zeolite). There was determined relative swelling capacity, value of sorptive capacity on spent-soap lye, carrying out optimization of sorption conditions of spent-soap lye by plant waste. Samplings from plant waste after absorption of spent-soap lye were burned at temperature of 1000oC, ash residues were investigated by means of X-ray phase analysis. There was determined solubility of ash in water and carrying out atomic adsorption analysis. There was offered scheme of spent-soap lye recovery with receiving of heat energy.
24-27 782
Abstract
There was demonstrated possibility of exhaust (purging, armored, ventilation) gases purification from ammonia by means of its catalytic decomposition. There was investigated dynamics of nickel-aluminium catalyst in the flow of ammonia gas. There was examined catalytic activity of catalyst in the process of ammonia cracking in the range of 500-700oC, space velocity 500-5000 h-1 andpressure of process 0.125 MPa. There was specified that at temperature more than 570oC the process of ammonia decomposition is carrying out nearly at equilibrium conditions. There was demonstrated that required for resolve of environmental issues of degree of ammonia conversion attained depending on space velocity value in the range of 570-700oC. Conservation of high values of mechanical strength and total specific area provides long-term exploitation of catalyst in industrial conditions.
28-31 470
Abstract
The aim of this study is investigation of influence of ultrasonic cleaning with reverse-osmotic membranes on their pollution in the installations of treatment of winter leachate as applied to landfill-site for municipal solid waste at laboratory bench. There was proved empirically the possibility of increasing of continuous operation period of reverse-osmotic membranes thank to continuous ultrasonic maintenance of filtration process. Experimental data were presented as criterial function describing dependence of efficiency of treatment of reverse-osmotic membranes on their pollution in installations of winter leachate at landfill-sites of solid municipal landfills.
32-34 532
Abstract
There were considered environmental aspects of joint recovery of industrial waste from heat power engineering and metallurgy and minerals industry. There was examined influence of copper slug and hornblendite addition on physical and mechanical properties of ash cement bricks in the presence of sodium sulfate that accelerates its hardening. There was investigated possibility of use of fly ash from Reftinskaya GRES in the manufacturing of unfired fly ash aggregate (UFA), in so much as from all existing techniques of effective porous aggregates derivation of UFA is the most resources- and energy-saving solution. On the base of UFA were obtained structural concretes with strength grade B25 and B40. In such a case fly ash aggregate’s consumption in ready-mix concrete by weight was lesser by 43-58%, than stones consumption, which allows decrease density of concrete by 17-58%.
ANALYSIS. METHODS. PROGNOSIS
35-39 405
Abstract
There was presented scientifically based technology of the organization and implementation of biological monitoring in forest areas nearby large industrial facility for chemical weapons destruction (Pochepsky district, Bryansk Oblast). The principles of the proposed monitoring system are observations on stationary growth plots in forest areas. There was offered substantiation of choice of the most informative biological objects: growing stock, soil, young growth, nether vet and live ground cover. There was discussed use in the monitoring system methods: tree-ring analysis, palynological studies, fluctuating asymmetry analysis, lichen indication method.
40-43 523
Abstract
Crucial task of toolkit development (“management instrumentation”) of maritime spatial planning could be solved with the aid of some existing quantitative methods, successfully applied for optimization of design solutions. In this regard there were considered possibilities of risk analysis use in estimation, forecasting and choice of measures on adjustment of environmental hazards in the design of maritime hydrotechnical constructions. There was demonstrated that environmental risk the most practicably evaluate in probabilistic-value terms: sum of ensemble average of damage from implementation of alternative scenario of environmentally hazard events. The use of offered method is demonstrated by the example of preliminary evaluation of impact on environment of offshore harbor Big Port Saint-Petersburg. The most winning side of such approach is a possibility of well-grounded design and managerial decisions, on the basis of interrelation of value of avert environmental risk and necessary for it costs.
44-48 538
Abstract
By 2011 around of 60% of metropolises of Russia, where lived more than 59 M people, have high and very high level of air pollution. Common denominator of Metropolises is a large volume of emissions from traffic flow. That is why we need often carry out actions on control and analysis of traffic influence on ecology. Based on research findings were calculated pollutants emissions into atmospheric air of City of Perm from the public passenger transport and was assessed environmental damage from given emissions. There was draw conclusion that public passenger transport has substantial influence on atmospheric air pollution in City of Perm, and use of environmentally compatible passenger transport (tram, trolley-bus) decreases value of environmental damage.
49-51 560
Abstract
There was investigated capacity of zeolites absorb arsenic from standardized test solutions. There was demonstrated by means of biotesting methods decreasing of solution Na3AsO4toxicity after interaction with activated zeolites. As adsorbent was used natural zeolite of Sakhaptinsk deposit, Krasnoyarsk Kray (LLC “Etnacom”). Zeolite was activated by V.M. Kan. In other option was taken zeolite, preliminary incinerated and impregnated by humic formulation solution Powhumus at concentration of 1 g/dm3 (or in place of was used Humate-80 at the same concentration). As control was assessed efficiency of arsenic binding by incinerated zeolite without subsequent addition to its humic formulations or other reagents. There was demonstrated that very efficient fom aqueous solution was eliminated zeolite activated by V.M. Kan technique. The same sampling of zeolite had, consequently, maximal sorption capacity, as well as to the maximum extent decreased toxicity of arsenic salts solutions.
52-54 405
Abstract
Cytogenetic characteristics of seed trees on environmentally safe territory are within normal limits. Such trees are reasonable use as mother plantation for seed harvesting. In the environmentally polluted area mother seed of in appearance normal trees of weeping birch has substantial quantity of cytogenetic distortions. This is testified stress, which parental generation sustained. There are non-recommended to use trees from polluted area for seed harvesting for purposes of landscaping.
ECOLOGICAL SAFETY
55-60 615
Abstract
There were considered modern understanding on environmental safety as science and course unit. There was demonstrated contribution into formation and development of environmental safety of some homeland and foreign scientists. There were considered different aspects of methodology and metrology of environmental safety. There were carried out comprehensive analysis of photosynthetic organisms as indicator of security level of natural habitat. Made analysis of safety and hazard interrelation. There were noted nowadays requirements to preparation of professionals on environmental safety.
ISSN 1816-0395 (Print)
ISSN 2413-6042 (Online)
ISSN 2413-6042 (Online)