scholarly journals Environment pollution of uranium in-situ leaching and its protection measures

2020 ◽  
pp. 820-825
Author(s):  
Kang Jian Qiao ◽  
Li Zhao Kun ◽  
Deng Hui Dong ◽  
Deng Jin Xun ◽  
Ma Jia
Keyword(s):  
Environment Pollution ◽  
Protection Measures ◽  
Uranium In Situ Leaching

The Decreasing Ways of Contaminated Underground Water Volume in Uranium Mining and Milling Region

2001 ◽  
Author(s):  
Natalya Isayeva
Keyword(s):  
Environmental Protection ◽  
Radioactive Contamination ◽  
Underground Water ◽  
Water Volume ◽  
Agricultural Lands ◽  
Protection Measures ◽  
Uranium Ore ◽  
Uranium In Situ Leaching ◽  
Long Time

Abstract Ukrainian uranium ore mining and milling facilities are located in the tight populated areas on the valuable agricultural lands of Ukraine. The almost 50th years’ activity of these enterprises has caused the radioactive contamination of the environment. The most dangerous facilities happened to be those ones which contaminate the entrails for a long time, namely: tailings which were discharged with the uranium ore uranium mill and former uranium in-situ leaching sites which are now decommissioned and left without relevant environmental protection measures. This paper considers two uranium facilities, which impact in a similar way on such an environmental entity as underground water: the tailings and in-situ leaching site located in Dnipropetrovsk region.

Intangible Cultural Property, Tangible Databases, Visible Debates: The Sawau Project

2009 ◽  
Vol 16 (3) ◽  
pp. 255-272 ◽  
Author(s):  
Guido Carlo Pigliasco
Keyword(s):  
Intellectual Property ◽  
Cultural Property ◽  
Pacific Island ◽  
Protection Measures ◽  
International Agencies ◽  
Intangible Heritage ◽  
Collaborative Tool ◽  
Digital Documentation ◽  
Pacific Island Countries

AbstractIntellectual property claims have long been sustained in a way that is now under severe scrutiny. Pacific Island countries continue to face unauthorized uses of their traditional knowledge and practices. In response, international agencies in collaboration with Pacific Island countries are promoting sui generis forms of protection. The Institute of Fijian Language and Culture's Cultural Mapping Programme looks beyond ongoing debates about indigenous collection and digitization of intangible heritage to promote sui generis protection measures in lieu of western intellectual property law. Supported by an Institute grant, the unfolding Sawau Project creates an archive of sites, stories, and shared memories of the Sawau people of Beqa, an island iconic in Fiji for its firewalking practice (vilavilairevo). Advocating a form of social intervention in situ, The Sawau Project has become a collaborative tool to encourage digital documentation, linkages, and institutional collaborations among Fijian communities and their allies to negotiate and promote alternative forms of protection.

scholarly journals Simulating In-Situ Leaching Process Using Comsol Multiphysics

2014 ◽  
Vol 60 (3) ◽  
pp. 213-217 ◽  
Author(s):  
Bakhyt K. Mukhanov ◽  
Zhanar Zh. Omirbekova ◽  
Azamat K. Usenov ◽  
Waldemar Wójcik
Keyword(s):  
Numerical Simulation ◽  
Process Control ◽  
Technological Process ◽  
Software Package ◽  
Comsol Multiphysics ◽  
Hydrodynamic Characteristics ◽  
Process Variables ◽  
Leaching Process ◽  
Uranium In Situ Leaching

Abstract The paper deals with simulation of in-situ uranium leaching technological process, collecting data for forecasting and leaching process control. It provides numerical simulation of uranium in-situ leaching (ISL) using Comsol Multiphysics software package application. Previous studies evaluated main hydrodynamic characteristics of wells and reservoirs, such as the coefficient of resistance and the saturation recovery; while this paper is concerned with determining the changes in process variables in the wells during operation.

scholarly journals Assessing the efficacy of direct conservation interventions: clutch protection of the leatherback marine turtle in the Dominican Republic

Oryx ◽  
2014 ◽  
Vol 49 (4) ◽  
pp. 677-686 ◽  
Author(s):  
Ohiana Revuelta ◽  
Yolanda M. León ◽  
Annette C. Broderick ◽  
Pablo Feliz ◽  
Brendan J. Godley ◽  
...  
Keyword(s):  
Dominican Republic ◽  
Hatching Success ◽  
Marine Turtle ◽  
Dermochelys Coriacea ◽  
Protection Measures ◽  
Nesting Site ◽  
Incubation Duration ◽  
Artificial Incubation

AbstractThe beaches of Jaragua National Park in the Dominican Republic are the country's last known major nesting site for the leatherback marine turtle Dermochelys coriacea. This nesting aggregation is threatened by widespread illegal egg take, and clutch relocation and artificial incubation have been carried out as protection measures since 1974. We assess the efficacy of such efforts and investigate how artificial incubation may be influencing the success and sex ratios of clutches. We compare hatching success, incubation duration and embryo mortality in in-situ clutches (n = 43) with those incubated artificially at sites in the east and west of the Park (n = 35 and n = 31, respectively). Our results show that in the west, artificial incubation significantly decreases hatching success in clutches. In the east the duration of incubation is increased, which we predict would result in an increase in the number of males from these clutches. Clutch relocation is currently the only viable conservation option for clutches on eastern beaches because of illegal egg take but action is needed to ensure that the natural sex ratio is not distorted. However, on the western beaches in situ clutch incubation seems possible through beach protection. Further community engagement and enforcement are required to improve conservation measures at eastern beaches if long-term, less sustainable intervention is to be avoided.

scholarly journals Background for phytotechnologies applied at multimetal contaminated sites in Ukraine

2019 ◽  
pp. 93-100
Author(s):  
Lidija Svirenko ◽  
Alevtina Nossova
Keyword(s):  
Low Cost ◽  
Contaminated Sites ◽  
Environment Pollution ◽  
Dredged Sediment ◽  
Natural Conditions ◽  
Landscape Degradation ◽  
Industrial Sectors ◽  
Local Plants ◽  
Dangerous Level

Ukraine is a country with a great diversity of natural conditions, developed agricultureand industrial sectors such as mining, metallurgy, machinery and chemical branches, Theuse of outdated technologies has resulted in landscape degradation and environmentcontamination. Sites with the dangerous level of contamination located at rivers'floodplain in industrial centers, near the spoil banks, especially burning, landfills,grounds for sludge and dredged sediment damping. Leachate from municipal \WSte dampis a source of environment pollution. For multi-metal contaminated sites, the treatmentwith phytotechnologies is proposed as a low cost and environmentally friendlyalternative. Willows are discussed as local plants for phytostabilization. Plants - hyperaccumulators could be found in Ukraine too and are used in the application ofphytotechnologies. Experimental work has to be done before the technique could beapplied in situ.

scholarly journals About improvement of environmental protection measures system in landfills of Russia with taking into account the possibility of biogas utilization

2019 ◽  
pp. 361-368
Author(s):  
Alexey Cheremisin ◽  
Michail Fiodorov
Keyword(s):  
Waste Processing ◽  
Main Attention ◽  
Additional Source ◽  
Domestic Waste ◽  
Solid Domestic Waste ◽  
Protection Measures ◽  
Processing Plants ◽  
Recycling Systems ◽  
Waste Accumulation

Continual growth of waste accumulation volumes, in particular, of solid domestic waste (SDW), causes a great many of environmental and economical problems such as, environmental (soil, groundwater and air) pollution, alienation of lands, alteration of landscape, growing expenses for construction of new waste processing plants and reconstruction of existing ones, etc. These are the actual problems in the cities and settlements of Russia and many other countries. The most part of SOW generated in Russia (97 %) is removed to the dumps and landfills and only 3 % is treated in waste processing plants. So, main attention should be concentrated on all the reduction of waste amount removed to the landfills which may be reached by means of development of environmental friendly wasteless or little waste technologies, in particular recycling systems introduction (organization of separate waste collection in situ, subsequent utilization of each useful SDW morphological components) and new waste processing plants construction. It should also take care of unauthorized dumps elimination, improving environmental conditions around the landfills, and engineering infrastructure safety provision. Besides, SDW consisting of organic materials for 50-80% may be considered as important additional source of energy. In particular, as to landfills, it is the power ofbiogas, which may be used for heating, electricity generation and several another purposes. The main expenses for biogas utilization are to extract, dry up and transport.

In situ Biological Groundwater Denitrification: Concepts and Preliminary Field Tests

1988 ◽  
Vol 20 (3) ◽  
pp. 197-209 ◽  
Author(s):  
A. Mercado ◽  
M. Libhaber ◽  
M. I. M. Soares
Keyword(s):  
Nitrate Concentration ◽  
Nitrate Removal ◽  
Small Diameter ◽  
Field Tests ◽  
Economic Feasibility ◽  
Injection Well ◽  
Nitrate Content ◽  
Injection Wells ◽  
Protection Measures

High nitrate concentration presents the main groundwater quality problem of the Israeli coastal aquifer which supplies 25% of the total water consumption of the country. In about 50% of the coastal wells nitrate concentration exceeds 45 mg/l and in 18% of the wells nitrate concentration is above the maximum permissible concentration of the new Israeli standard - 70 mg/l. Although several protection measures, mainly administrative, were introduced, their impact would be pronounced only after 1-3 decades, thus nitrate removal technologies should be introduced as a mid-term solution. Pilot plant experiments were conducted in order to develop, demonstrate and compare various in-situ schemes for nitrate removal from groundwater by biological denitrification. Activities were focused towards two schemes: (i) Denitrification in a dual purpose (recharge-pumping) well and (ii) Substrate injection through a battery of small diameter wells surrounding a central production well (the “Daisy” system). Experiments related to the first scheme indicate that, though nitrate content can be reduced almost to zero, its economic feasibility seems to be unfavorable because of operational difficulties and the apparent requirements for costly supplementary treatment. Experiments related to the “Daisy” scheme demonstrated a nitrate removal efficiency of approximately 10%. Considering the fact that only one injection well of the three drilled functioned properly, the above mentioned nitrate removal represents the efficiency of a single injection well. It is anticipated that further experiments with the “Daisy” system consisting of 5-6 injection wells would result in a significant nitrate reduction.

Field Trials on the Effectiveness of Radon Protection Measures in New Dwellings

1994 ◽  
Vol 56 (1-4) ◽  
pp. 33-40 ◽  
Author(s):  
M. Woolliscroft ◽  
C. Scivyer ◽  
L. Parkins
Keyword(s):  
Indoor Radon ◽  
Field Trials ◽  
Radon Level ◽  
Annual Average ◽  
Protection Measures ◽  
Building Regulations ◽  
South West ◽  
Level 1 ◽  
Protective Membrane

Abstract The purpose of the field trials reported here was to verify the effectiveness of radon protection measures implemented under UK Building Regulations. Measurements were carried out in a total of 423 dwellings using etched track detectors. Some of the dwellings were protected, others were not. Four factors were considered likely to affect the annual average indoor radon level: (1) The radon level of the area. (2) The type of floor construction. (3) The presence or absence of a protective membrane in the floor construction. (4) Whether the dwelling was detached or attached to other dwellings. The radon level of the area is characterised by the proportion of existing houses in the area above the action level. The type of construction is generally in situ concrete floor or block and beam floor. Houses were situated on a total of 33 sites scattered all over Devon and Cornwall in the south west of England (an area of relatively high radon levels) offering a variety of both terrain and housing types. Statistical analysis showed that the effect of the membrane in reducing the radon level was significant at the 0.1% level. The effect of the floor construction, was however only significant at the 5% level. Neither the radon level of the area in which the dwelling was situated nor whether the dwelling was detached or attached had statistically significant effects on the radon level.

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