scholarly journals ROSPECTS OF DEVELOPMENT OF ORE DEPOSITS DAGESTAN (ENVIRONMENTAL ASPECTS)

2016 ◽  
Author(s):  
В.И. Черкашин ◽  
И.М. Газалиев
Keyword(s):  
Heavy Metals ◽  
Analysis Data ◽  
Economic Benefits ◽  
Mineral Deposit ◽  
Ore Deposits ◽  
Environmental Damage ◽  
Chemical Contamination ◽  
Long Run ◽  
Lead And Zinc ◽  
The Status

Целью работы является оценка влияния на окружающую среду выявленных в ходе геологоразведочных работ 1964-1983 гг. рудопроявлений Хнов-Борчинского рудного поля и медно-колчеданного месторождения Кизил-Дере. В основу работы положены данные химических анализов вод рек района исследований и результаты анализа опубликованных материалов по данной тематике. Результаты исследований свидетельствуют о загрязнении водных систем района тяжелыми металлами. Это связывается с тем, что после разведочных работ на рудопроявлениях не проведены в полном объеме ликвидационные, консервационные и рекультивационные работы. Преобладающие в составе руд сульфиды железа, меди, свинца и цинка, взаимодействуя с кислородом воздуха и грунтовыми водами, превращаются в купоросы и сбрасываются в речные системы. Сохранение существующего положения вещей в долгосрочном аспекте может привести к активизации окислительно-восстановительных процессов, процессов выщелачивания в условиях поверхности месторождения Кизил-Дере, к прогрессирующему химическому загрязнению вод и земель бассейна р. Самур солями тяжелых металлов, ухудшению качества питьевых и орошаемых вод, а также к безвозвратному истощению уникального месторождения полезных ископаемых. Учитывая вышесказанное можно сделать вывод. В существующей ситуации считаем необходимым безотлагательное проведение работ по консервации рудопроявлений Хнов-Борчинского рудного поля, которые можно выполнить в рамках действующей Федеральной целевой программы «Ликвидация на- копленного экологического ущерба». При принятии решения о разработке месторождения Кизил-Дередолжен быть разработан проект его разработки с последующим выполнением оценки воздействия на окружающую среду (ОВОС). Это позволит оценить конкретные экономические выгоды от реализации проекта, экологические риски и уровень мероприятий по охране окружающей среды The aim of the study is to evaluate the effect of the ore-occurrences, identified during the geological exploration in 1964-1983, on the environment in the Khnov-Borchinsk ore-field and Kizil-Dere copper-pyrite deposit. The study is based on the chemical analysis data of the waters from the study area and the analysis of published materials on the subject. Results of the study indicate contamination of water systems of the area with heavy metals. This is attributed to the fact that after the exploration there were not carried out the liquidation, conservation and reclamation works on the ore occurrences in full scale. Sulphides of iron, copper, lead and zinc, prevailing in the composition of ores, interacting with oxygen in the air and groundwater, convert into sulfate and are discharged into the river systems. Preserving the status quo in the long run can lead to the activation of the redox processes, leaching processes under the surface of the field of Kizil-Dere, progressive chemical contamination of waters and lands of the Samur river basin with salts of heavy metals, deterioration in quality of drinking and irrigation waters, as well as to the permanent depletion of the unique mineral deposit. The above said allows to conclude that in the current situation we consider it necessary to urgently conduct the works on conservation of the Khnov-Borchinsk ore-field occurrences, which can be done under the existing federal target program “The elimination of accumulated environmental damage.” When deciding on the Kizil-Dere field the exploration project, followed by the implementation of environmental impact assessment (EIA) should be developed. It will allow assessing the specific economic benefits of the project, environmental risks and the level of measures to protect the environment.

Enhancing community welfare through improved water quality: a case for applying staggered pollution charges in the river Musi sub-basin of Andhra Pradesh, India

Water Policy ◽  
2005 ◽  
Vol 7 (5) ◽  
pp. 469-483
Author(s):  
Tishya Chatterjee
Keyword(s):  
Andhra Pradesh ◽  
Relevant Literature ◽  
Pollution Prevention ◽  
Economic Benefits ◽  
Environmental Damage ◽  
Marginal Costs ◽  
Community Acceptance ◽  
Level Data ◽  
Over Time

In conditions of severe water-pollution and dormant community acceptance of accumulating environmental damage, the regulator's role goes beyond pollution prevention and more towards remediation and solutions based on the community's long-term expectations of economic benefits from clean water. This paper suggests a method to enable these benefits to become perceptible progressively, through participatory clean-up operations, supported by staggered pollution charges. It analyses the relevant literature on pollution prevention and applies a cost-based “willingness to pay” model, using primary basin-level data of total marginal costs. It develops a replicable demand-side approach imposing charge-standard targets over time in urban-industrial basins of developing countries.

scholarly journals Remediating Agricultural Legacy Nutrient Loads in the Baltic Sea Region

2021 ◽  
Vol 13 (7) ◽  
pp. 3872
Author(s):  
Julia Tanzer ◽  
Ralf Hermann ◽  
Ludwig Hermann
Keyword(s):  
Baltic Sea ◽  
Agricultural Soils ◽  
Economic Benefits ◽  
Current Data ◽  
Nutrient Loads ◽  
The Baltic Sea ◽  
Nutrient Emissions ◽  
Long Run ◽  
The Baltic ◽  
Agricultural Legacy

The Baltic Sea is considered the marine water body most severely affected by eutrophication within Europe. Due to its limited water exchange nutrients have a particularly long residence time in the sea. While several studies have analysed the costs of reducing current nutrient emissions, the costs for remediating legacy nutrient loads of past emissions remain unknown. Although the Baltic Sea is a comparatively well-monitored region, current data and knowledge is insufficient to provide a sound quantification of legacy nutrient loads and much less their abatement costs. A first rough estimation of agricultural legacy nutrient loads yields an accumulation of 0.5–4.0 Mt N and 0.3–1.2 Mt P in the Baltic Sea and 0.4–0.5 Mt P in agricultural soils within the catchment. The costs for removing or immobilising this amount of nutrients via deep water oxygenation, mussel farming and soil gypsum amendment are in the range of few tens to over 100 billion €. These preliminary results are meant as a basis for future studies and show that while requiring serious commitment to funding and implementation, remediating agricultural legacy loads is not infeasible and may even provide economic benefits to local communities in the long run.

scholarly journals Concentration of cadmium and lead in vegetables and fruits

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Monika Rusin ◽  
Joanna Domagalska ◽  
Danuta Rogala ◽  
Mehdi Razzaghi ◽  
Iwona Szymala
Keyword(s):  
Heavy Metals ◽  
Fruits And Vegetables ◽  
Significant Risk ◽  
Absorption Spectrometry ◽  
Food Groups ◽  
Chemical Contamination ◽  
Fresh Frozen ◽  
Processed Products ◽  
Cadmium And Lead ◽  
Vegetables And Fruits

AbstractChemical contamination of foods pose a significant risk to consumers. A source of this risk is due to the consumption of products contaminated with heavy metals such as cadmium (Cd) and lead (Pb). The aim of the study was to research the levels of Cd and Pb contamination of selected species of vegetables and fruits in the form of fresh, frozen, dried and processed products. The goal was to verify which of these food groups was more contaminated with heavy metals. The study covered 370 samples of fruits and vegetables including apples, pears, grapes, raspberries, strawberries, cranberries, as well as beetroots, celeries, carrots and tomatoes. The content of Cd and Pb was determined by atomic absorption spectrometry. Quantitative results were analyzed using statistical models: analysis of variance, outlier analysis, post-hoc multiple comparison Tukey test. The tests showed that the levels of Cd and Pb concentration in samples of fresh, processed, frozen and dried fruits and vegetables varied substantially. The highest concentrations were recorded in dried products. Several fruit and vegetable samples exceeded the maximum permissible concentrations of Cd and Pb. The contamination of these products could be a significant source of consumer exposure to heavy metals when these products are a part of the diet.

scholarly journals Risk and Impact Assessment of Dams in the Contiguous United States Using the 2018 National Inventory of Dams Database

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1066
Author(s):  
Junho Song ◽  
Madden Sciubba ◽  
Jonghun Kam
Keyword(s):  
United States ◽  
Storage Capacity ◽  
The United States ◽  
Economic Benefits ◽  
Spatiotemporal Patterns ◽  
Dam Failure ◽  
Environmental Damage ◽  
Hazard Potential ◽  
Significant Potential ◽  
National Inventory

Aging water infrastructure in the United States (U.S.) is a growing concern. In the U.S., over 90,000 dams were registered in the 2018 National Inventory of Dams (NID) database, and their average age was 57 years old. Here, we aim to assess spatiotemporal patterns of the growth of artificial water storage of the existing dams and their hazard potential and potential economic benefit. In this study, we use more than 70,000 NID-registered dams to assess the cumulative hazard potential of dam failure in terms of the total number and the cumulative maximum storage of dams over the 12 National Weather Service River Forecast Center (RFC) regions. In addition, we also estimate potential economic benefits of the existing dams based on their cumulative storage capacity. Results show that the ratios of the cumulative storage capacity to the long-term averaged precipitation range from 8% (Mid-Atlantic) to 50% (Colorado), indicating the significant anthropogenic contribution to the land surface water budget. We also find that the cumulative storage capacity of the dams with high (probable loss of human life is if the dam fails) and significant (potential economic loss and environmental damage with no probable casualty) hazard potential ranges from 50% (North Central) to 98% (Missouri and Colorado) of the total storage capacity within the corresponding region. Surprisingly, 43% of the dams with either high or significant potential hazards have no Emergency Action Plan. Potential economic benefits from the existing dams range from $0.7 billion (Mid Atlantic) to $15.4 billion (West Gulf). Spatiotemporal patterns of hazard potential and economic benefits from the NID-registered dams indicate a need for the development of region-specific preparation, emergency, and recovery plans for dam failure. This study provides an insight about how big data, such as the NID database, can provide actionable information for community resilience toward a safer and more sustainable environment.

Research on the Morphological of Lead and Zinc in the Smelting Slag

2015 ◽  
Vol 1088 ◽  
pp. 200-205
Author(s):  
Lin Yu ◽  
Dong Wei Li
Keyword(s):  
Heavy Metals ◽  
Sequential Extraction ◽  
Ecological Risk ◽  
Total Content ◽  
Residual Fraction ◽  
Bcr Sequential Extraction ◽  
Lead And Zinc ◽  
Smelting Slag ◽  
Reducible Fraction

In this paper analysed the forms of heavy metals (Zn Pb Cd and As) of the Smelting Slag for Lead and Zinc,using BCR sequential extraction. Different chemical morphological of heavy metals have different activity and harmfulness. Migration and Utilization of heavy metals were decided by the existent form of heavy metals in the soil,which influenced Bioactivity and Toxicity. The results show that the main forms of Zn and Cd are Oxidizable and Residual fraction, and Pb mainly occurred in Oxidizable and Reducible fraction. however, As mainly occurred in Residual fraction, which the percentage of reachs 99.56%. According to the percentage of fractions extracted in total content (As is 0.44%, Zn is 14.7%, Pb is 85.98%, Cd is 48.86%),the latent ecological risk of heavy metals varied in the descending order of,Pb Cd Zn and As.

Reducing the Impact of Unemployment through Work-Sharing: Some Industrial Relations Considerations

1983 ◽  
Vol 25 (2) ◽  
pp. 153-161 ◽  
Author(s):  
Noah M. Meltz ◽  
Frank Reid
Keyword(s):  
Local Level ◽  
Industrial Relations ◽  
National Level ◽  
Economic Benefits ◽  
Firm Level ◽  
Labour Relations ◽  
Work Sharing ◽  
Long Run ◽  
Short Run ◽  
The Impact

The Canadian Government has introduced a work-sharing program in which lay offs are avoided by reducing the work week and using unemployment insurance funds to pay workers short-time compensation. Compared to the lay-off alternative, there appear to be economic benefits to work-sharing for both management and employees. Reaction to the scheme has been generally positive at the union local level and the firm level, but it has been negative at the national level of both labour and management. These divergent views can be explained mainly as a result of short-run versus long-run perspectives. Managers at the firm level see the immediate benefit of improved labour relations and the avoidance of the costs of hiring and training replacements for laid-off workers who do not respond when recalled. The national business leaders are more concerned with work incentive and efficiency aspects of work-sharing.

Evaluation of chemical contamination of surface water and groundwater in the landfill city of Ardabil

2015 ◽  
Vol 16 (SE) ◽  
pp. 631-637
Author(s):  
Maliheh Shahmorad Moghanlou ◽  
Ebrahim Fataei
Keyword(s):  
Heavy Metals ◽  
Surface Water ◽  
International Standards ◽  
Chemical Contamination ◽  
Mean Values ◽  
Surface Water And Groundwater ◽  
Turbidity Level ◽  
The Mean ◽  
Spss Software ◽  
Hydrodynamic Thickness

Todays in our country the problem of waste disposal and the effects of entry alluvial aquifer their leachate and pollution of aquifers by hydrodynamic thickness in the direction of groundwater flow is highly regarded analytical descriptive study was conducted. To this purpose, the concentration of heavy metals plumb and cadmium and some physicochemical and biological parameters of surface water and groundwater around the landfill city of Ardabil in two time periods in spring 2015 and summer seasons were measured. Sampling, preparation and analysis of samples in accordance with the standard method of station 10 to within 5.5 km of landfill were Ardabil. Measurement of heavy metals, plumb and cadmium by atomic absorption were performed. The Results were analyzed by SPSS software, for the comparison of each parameter with drinking water standards and Agriculture tests comparing the average (T-TEST) was used. The results showed that groundwater and surface water of heavy metals, non-contaminated area and their results are below international standards. The mean values ??of microbiological and physicochemical parameters other than normal turbidity level and at the level of 1% were significantly lower than international standards.

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