scholarly journals Experimental Evaluation of PM Emission from Red Mud Basins Exposed to Wind Erosion

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 405
Author(s):  
Valentina Dentoni ◽  
Battista Grosso ◽  
Francesco Pinna
Keyword(s):  
Air Pollution ◽  
Red Mud ◽  
Emission Factor ◽  
Wind Erosion ◽  
Environmental Policies ◽  
Global Scale ◽  
Environmental Issue ◽  
Modeling Tools ◽  
Alumina Industry ◽  
The Impact

The disposal of industrial and mineral processing residues represents a major concern for human health and the environment as a whole. In order to reduce the impact on soil and groundwater due to the waste leachability, the implementation of environmental regulations worldwide has favored the conversion of the disposal techniques from wet to dry (i.e., dry stacking or dry disposal). Such a change in the storage practice may cause the increase of particulate matter (PM) emission from the dry surfaces of the tailings exposed to wind erosion. Considering the significance of the environmental issue on a global scale and the increasingly stricter orientation of environmental policies, the need for modeling tools capable of estimating the contribution of tailing basins to air pollution becomes apparent. The paper deals with the disposal of red mud resulting from the bauxite processing in the alumina industry. An experimental research was carried with an environmental wind tunnel to estimate the Emission Factor (EF) of the basin surfaces as a function of the main affecting variables (i.e., residue water content and wind velocity). The article reports the results of the experimental test carried out on the red mud from a major basin located in Sardinia (Italy).

scholarly journals The global environmental problem of the XXI century, new realities

2020 ◽  
Vol 208 ◽  
pp. 01019
Author(s):  
Natalya Frolova
Keyword(s):  
Air Pollution ◽  
Environmental Problem ◽  
Global Scale ◽  
Forest Area ◽  
Species Barrier ◽  
Economic Relations ◽  
Zoonotic Infections ◽  
Global Pandemic ◽  
Global Environmental ◽  
The Impact

The article analyzes the global environmental problem in its traditional aspects, such as a decrease in forest area, degradation of land resources, air pollution, as well as in its new features - a global pandemic. The article initially presents the concept of a global environmental problem from the perspective of foreign and domestic scientists, as well as international organizations. Further, the analysis of the manifestation of the global environmental problem is carried out in terms of quantitative indicators: reduction of forest area, land degradation, air pollution. The author outlines such an aspect of a global environmental problem as zoonotic infections, that is, the transfer of viruses from animals to humans. Under new conditions, the spread of viruses is accelerating, they easily overcome the species barrier, cause infection of the human body. The transmission of viruses on a global scale is becoming a new reality. At the same time, there are also “side” manifestations of the virus associated with its impact on the socio-economic development of individual countries, the impact on the policy of world economic relations. In conclusion, the author describes specific ways of solving the global environmental problem, both for individual countries and the world in general.

scholarly journals Assessing the Country-Level Excess All-Cause Mortality and the Impacts of Air Pollution and Human Activity during the COVID-19 Epidemic

2021 ◽  
Vol 18 (13) ◽  
pp. 6883
Author(s):  
Yuan Meng ◽  
Man Sing Wong ◽  
Hanfa Xing ◽  
Mei-Po Kwan ◽  
Rui Zhu
Keyword(s):  
Air Pollution ◽  
Human Activity ◽  
Human Activities ◽  
Ground Level ◽  
Global Scale ◽  
Country Level ◽  
Relative Risks ◽  
All Cause Mortality ◽  
Specific Mortality ◽  
The Impact

The impact of Coronavirus Disease 2019 (COVID-19) on cause-specific mortality has been investigated on a global scale. However, less is known about the excess all-cause mortality and air pollution-human activity responses. This study estimated the weekly excess all-cause mortality during COVID-19 and evaluated the impacts of air pollution and human activities on mortality variations during the 10th to 52nd weeks of 2020 among sixteen countries. A SARIMA model was adopted to estimate the mortality benchmark based on short-term mortality during 2015–2019 and calculate excess mortality. A quasi-likelihood Poisson-based GAM model was further applied for air pollution/human activity response evaluation, namely ground-level NO2 and PM2.5 and the visit frequencies of parks and workplaces. The findings showed that, compared with COVID-19 mortality (i.e., cause-specific mortality), excess all-cause mortality changed from −26.52% to 373.60% during the 10th to 52nd weeks across the sixteen countries examined, revealing higher excess all-cause mortality than COVID-19 mortality in most countries. For the impact of air pollution and human activities, the average country-level relative risk showed that one unit increase in weekly NO2, PM2.5, park visits and workplace visits was associated with approximately 1.54% increase and 0.19%, 0.23%, and 0.23% decrease in excess all-cause mortality, respectively. Moreover, compared with the impact on COVID-19 mortality, the relative risks of weekly NO2 and PM2.5 were lower, and the relative risks of weekly park and workplace visits were higher for excess all-cause mortality. These results suggest that the estimation based on excess all-cause mortality reduced the potential impact of air pollution and enhanced the influence of human activities compared with the estimation based on COVID-19 mortality.

scholarly journals The Impact of Environmental Policies That Influence Job Market

2019 ◽  
Vol 8 (4) ◽  
pp. 1113-1115
Keyword(s):  
Environmental Issues ◽  
Environmental Policies ◽  
Environmental Issue ◽  
Job Market ◽  
Qualitative Research Design ◽  
Interview Session ◽  
Job Opportunities ◽  
Pencil And Paper ◽  
The Impact ◽  
And Training

Environmental issues such as global warming, acid rain, air pollution, and waste disposal have been debating on various platforms. Over the last few decades, the exploitation and degradation of the environment and degradation have gone up at an alarming rate. These issues are not influencing the environment, but it is also impacted the green industries (i.e. supply chain management, manufacturing operation, and production) and educational system (i.e. teaching strategies, graduates, and skills). Government plays an important role in order to ensure the impact of the environmental issue can be controlled. One of the strategies is by improving the policies. In this paper, we aimed to explore and discover the other factors regard the environmental policies that potential influences the green industries and job opportunities. A qualitative research design was conducted by using pencil and paper interviewing approach. Six experts were selected from the company, which have been applying the green concept among their organization. From the interview session, a possible factor such as skill and training practices for layman workers is found.

THE IMPACT OF METEOROLOGICAL PARAMETERS ON SULPHURIC AIR POLLUTION IN KOHTLA-JÄRVE

Oil Shale ◽  
2011 ◽  
Vol 28 (2) ◽  
pp. 337
Author(s):  
J PAVLENKOVA ◽  
M KAASIK ◽  
E-S KERNER ◽  
A LOOT ◽  
R OTS
Keyword(s):  
Air Pollution ◽  
Meteorological Parameters ◽  
The Impact

THE IMPACT OF DIFFERENT URBAN LAND USE TYPES ON AIR POLLUTION IN THE MEGACITY OF SÃO PAULO

2020 ◽  
Vol 7 (1) ◽  
pp. 91
Author(s):  
Júlio Barboza Chiquetto ◽  
Maria Elisa Siqueira Silva ◽  
Rita Yuri Ynoue ◽  
Flávia Noronha Dutra Ribieiro ◽  
Débora Souza Alvim ◽  
...  
Keyword(s):  
Land Use ◽  
Air Pollution ◽  
Urban Land ◽  
Sao Paulo ◽  
Urban Land Use ◽  
São Paulo ◽  
Land Use Types ◽  
The Impact

A poluição do ar é influenciada por fatores naturais e antropogênicos. Quatro pontos de monitoramento (veicular, comercial, residencial e background urbano (BGU))da poluição do ar em São Paulo foram avaliados durante 16 anos, revelando diferenças significativas devidoao uso do solo em todas as escalas temporais. Na escala diurna, as concentrações de poluentes primários são duas vezes mais altas nos pontos veicular e residencial do que no ponto BGU, onde a concentração de ozonio (O3) é 50% mais alta. Na escala sazonal, as concentrações de monóxido de carbono(CO) variaram em 80% devido ao uso do solo, e 55% pela sazonalidade.As variações sazonais ede uso do solo exercem impactos similares nas concentrações de O3 e monóxido de nitrogênio (NO). Para o material particulado grosso (MP10) e o dióxido de nitrogênio(NO2), as variações sazonais são mais intensas do que as por uso do solo. Na série temporal de 16 anos, o ponto BGU apresentou correlações mais fortes e significativas entre a média mensal de ondas longas (ROL) e o O3 (0,48) e o MP10 (0,37), comparadas ao ponto veicular (0,33 e 0,22, respectivamente). Estes resultados confirmam que o uso do solo urbano tem um papel significativo na concentração de poluentes em todas as escalas de análise, embora a sua influência se torne menos pronunciada em escalas maiores, conforme a qualidade do ar transita de um sistema antropogênico para um sistema natural. Isto poderá auxiliar decisões sobre políticas públicas em megacidades envolvendo a modificação do uso do solo.

Sign in / Sign up

Export Citation Format

Share Document