scholarly journals Environmental and Health Risk of Hydrogen Sulphide (H2S) Levels Around some Dumpsites in the Niger Delta Region: A Case Study of Yenagoa Metropolis

2019 ◽  
Vol 1 (3) ◽  
pp. 1-6
Author(s):  
Tariwari C.N Angaye ◽  
Koru J. Alagoa
Keyword(s):  
Air Quality ◽  
Hydrogen Sulphide ◽  
Global Climate ◽  
Anthropogenic Activities ◽  
Wet Season ◽  
Niger Delta Region ◽  
Spatial Level ◽  
H2s Emission ◽  
Global Threat

Emission of Hydrogen Sulphide (H2S) from dumpsites has become a global threat due to its impact on global climate change. This study assessed the spatial and seasonal levels of H2S emissions from 6 dumpsites (LA - LF), with portable air quality meter (AEROQUAL-Series 300). Results showed that the spatial level of H2S ranged from 1.40 ppm - 14.34 ppm. Based on seasonal variation level of H2S ranged from 1.88 ppm – 3.86 ppm (p<0.05), with higher values in wet season. Meanwhile H2S were not detected in the control station (LX). Based on model for Air Quality Index (AQI), H2S emission was predominantly rated as safe and moderate, except for the two stations in the central dumpsite (LE and LF). These results confirmed the emission of H2S from the dumpsite due to anthropogenic activities. We therefore recommend policies aimed at sequestration of H2S, by the reduce, reuse and recycle policy of waste stream.

scholarly journals THE IMPACT OF ZINC AND LEAD MINING ON AIR QUALITY AT AGALAGU ALIKE IN IKWO LGA OF EBONYI STATE

2021 ◽  
pp. 21-30
Author(s):  
Nene Anyahara ◽  
Ulunma Nwosu ◽  
Chibueze Awuchi ◽  
Ugochi Obinna
Keyword(s):  
Air Quality ◽  
Anthropogenic Activities ◽  
Harmful Effect ◽  
Wet Season ◽  
Mining Site ◽  
Atmospheric Air ◽  
A Value ◽  
Life On Earth ◽  
The Impact

Atmospheric air consist of mixtures of gases composed mainly of nitrogen and oxygen with small proportion of carbon, noble gases and water vapor essential for the sustenance of life on earth. Anthropogenic activities in diverse ways may threaten the quality of atmospheric air and impairs its quality on life. The introduction of any chemical, physical, or biological agent into the atmosphere, in quantities large enough to produce harmful effect to man and its surrounding environment calls for concern. Therefore, an assessment is needed on air quality and on this basis; air quality test was carried out at the mining site at Agalagu Alike in Ikwo Local Government Area of Ebonyi State, and the results collated indicated lesser air pollution across the mine site, except NO2 and SO2. Although the level of NO2 concentration in the study location can be attributed to the activities of mining going on in that area. It was also observed from the results collated that the particulate matter at the study location and immediate environment was very low, which could result from the season of the year (wet season) which the analysis was carried out. Other pollutants like NH3, H2S VOC, and CO were not detected within the coordinates studied in the location. The level of O2 within the location was found to be the same across all the sampling points, with a value of 20.9.

scholarly journals Vulnerability Assessment of Maize Yield Affected by Precipitation Fluctuations: A Northeastern United States Case Study

Land ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1190
Author(s):  
Peng Su ◽  
Shiqi Li ◽  
Jing’ai Wang ◽  
Fenggui Liu
Keyword(s):  
Crop Yields ◽  
Global Climate ◽  
Maize Yield ◽  
High Water ◽  
Negative Slope ◽  
Vulnerability Curve ◽  
Yield Risk ◽  
Spatial Level ◽  
Maize Yields

Crop yields are threatened by global climate change. Maize has high water requirements, and precipitation fluctuations can impact its yield. In this study, we used the Environmental Policy Integrated Climate (EPIC) model to simulate maize yields in eight northeastern U.S. states. We used precipitation fluctuations and the coefficient of variation (CV) of yield as indicators to construct a vulnerability curve for the CV of yield and precipitation fluctuations. We then evaluated the vulnerability of maize yields under precipitation fluctuations in the region. We obtained the following results: (1) the fitted vulnerability curves were classified into three categories (positive slope, negative slope, and insignificant fit), of which the first category accounted for about 92.7%, indicating that the CV of maize yield was positively correlated with precipitation fluctuations in most parts of the study area; and (2) the CV of maize yield under 11 precipitation fluctuation scenarios was mapped to express the CV at the spatial level, and the maize yield in Connecticut and Maryland proved to be the most sensitive to precipitation fluctuations. This study provided a theoretical and experimental basis for the prevention of maize yield risk under fluctuating precipitation conditions.

scholarly journals Short-term shoreline evolution trend assessment: A case study in Glefe, Ghana

2012 ◽  
Vol 4 (1) ◽  
Author(s):  
Kwadwo Y. Amoani ◽  
Kwasi Appeaning−Addo ◽  
Wahab S. Laryea
Keyword(s):  
Global Climate ◽  
Average Rate ◽  
Anthropogenic Activities ◽  
Integrated Management ◽  
Shoreline Change ◽  
Coastal Areas ◽  
Rate Of Change ◽  
High Rate ◽  
Rtk Gps

The growing economic, social and ecological importance of coastal areas in Ghana has increased the challenges associated with sustainably managing the coastal resources. The coastal areas have become more prone and vulnerable to natural and human-made hazards such as coastal erosion. Shoreline retreat is recognised as a burgeoning threat because of global climate change and other anthropogenic activities that alter the natural processes sustaining beaches and coasts. This article describes an application of Real-time Kinematic-Global Positioning System (RTK-GPS) technology and digitising of shorelines from orthophotos to detect and analyse the spatial changes as well as quantify the result of shoreline change at Glefe, a suburb of Accra in Ghana. Shoreline positions from a 2005 orthophoto and a 2011 RTK-GPS survey were overlaid in MATLAB (Matrix Laboratory) and the average rate of change determined using the endpoint rate (EPR) method. The shoreline change rate determined for Glefe between 2005 and 2011 was 1.2 m/a ± 1.3 m/a, indicating a relatively high rate of erosion. Outcomes of the case study can be used as a basis for a sustainable integrated management plan for the coastal area.

Indoor and outdoor air quality monitoring in hemp house — Case study

2011 ◽  
Vol 6 (3) ◽  
pp. 63-72 ◽  
Author(s):  
Jarmila Rimbalová ◽  
Silvia Vilčeková ◽  
Adriana Eštoková
Keyword(s):  
Air Quality ◽  
Quality Monitoring ◽  
Air Quality Monitoring ◽  
Outdoor Air ◽  
Outdoor Air Quality ◽  
Indoor And Outdoor

Rising Importance of Organosulfur Species for Aerosol Properties and Future Air Quality

2019 ◽  
Author(s):  
Matthieu Riva ◽  
Yuzhi Chen ◽  
Zhang, Yue ◽  
Ziying Lei ◽  
Nicole Olson ◽  
...  
Keyword(s):  
Air Quality ◽  
Physicochemical Properties ◽  
Phase State ◽  
Global Climate ◽  
Field Measurements ◽  
Organic Aerosol ◽  
Organic Sulfate ◽  
Isoprene Oxidation ◽  
Aerosol Properties ◽  
Inorganic Sulfate

<div>Acid-driven multiphase chemistry of isoprene epoxydiols (IEPOX), a key isoprene oxidation product, with inorganic sulfate aerosol yields substantial amounts of secondary organic aerosol (SOA) through the formation of organosulfur. The extent and implications of inorganic-to-organic sulfate conversion, however, are unknown. Herein, we reveal that extensive consumption of inorganic sulfate occurs, which increases with the IEPOX-to-inorganic sulfate ratio (IEPOX:Sulf<sub>inorg</sub>), as determined by laboratory and field measurements. We further demonstrate that organosulfur greatly modifies critical aerosol properties, such as acidity, morphology, viscosity, and phase state. These new mechanistic insights reveal that changes in SO<sub>2</sub> emissions, especially in isoprene-dominated environments, will significantly alter biogenic SOA physicochemical properties. Consequently, IEPOX:Sulf<sub>inorg</sub> will play a central role in understanding historical climate and determining future impacts of biogenic SOA on global climate and air quality.</div>

Orchestrating the nation

2018 ◽  
Author(s):  
Barley Norton
Keyword(s):  
Climate Change ◽  
Global Climate Change ◽  
Global Climate ◽  
East Asian ◽  
Ancestor Worship ◽  
National Heritage ◽  
The City ◽  
Historical Periods ◽  
Party State

This chapter addresses the cultural politics, history and revival of Vietnamese court orchestras, which were first established at the beginning of the Nguyễn dynasty (1802–1945). Based on fieldwork in the city of Hue, it considers the decolonizing processes that have enabled Vietnamese court orchestras to take their place alongside other East Asian court orchestras as a display of national identity in the global community of nations. The metaphor of ‘orchestrating the nation’ is used to refer to the ways in which Vietnamese orchestras have been harnessed for sociopolitical ends in several historical periods. Court orchestras as heritage have recourse to a generic, precolonial past, yet they are not entirely uncoupled from local roots. Through a case-study of the revival of the Nam Giao Sacrifice, a ritual for ‘venerating heaven’, the chapter addresses the dynamics of interaction and exchange between staged performances of national heritage and local Buddhist and ancestor worship rituals. It argues that with growing concern about global climate change, the spiritual and ecological resonances of the Nam Giao Sacrifice have provided opportunities for the Party-state to reassert its position as the supreme guardian of the nation and its people.

Impacts of noise barriers on near-viaduct air quality in a city: A case study in Xi'an

2021 ◽  
Vol 196 ◽  
pp. 107751
Author(s):  
Bing Li ◽  
Zhaowen Qiu ◽  
Jinlong Zheng
Keyword(s):  
Air Quality ◽  
Noise Barriers

scholarly journals Ground-Based MAX-DOAS Observations of Tropospheric NO2 and HCHO During COVID-19 Lockdown and Spring Festival Over Shanghai, China

2021 ◽  
Vol 13 (3) ◽  
pp. 488
Author(s):  
Aimon Tanvir ◽  
Zeeshan Javed ◽  
Zhu Jian ◽  
Sanbao Zhang ◽  
Muhammad Bilal ◽  
...  
Keyword(s):  
Air Quality ◽  
Anthropogenic Activities ◽  
Anthropogenic Activity ◽  
Hysplit Model ◽  
Vertical Column ◽  
Weekly Cycle ◽  
Spring Festival ◽  
Level 1 ◽  
Reduced Mobility ◽  
The Impact

Reduced mobility and less anthropogenic activity under special case circumstances over various parts of the world have pronounced effects on air quality. The objective of this study is to investigate the impact of reduced anthropogenic activity on air quality in the mega city of Shanghai, China. Observations from the highly sophisticated multi-axis differential optical absorption spectroscope (MAX-DOAS) instrument were used for nitrogen dioxide (NO2) and formaldehyde (HCHO) column densities. In situ measurements for NO2, ozone (O3), particulate matter (PM2.5) and the air quality index (AQI) were also used. The concentration of trace gases in the atmosphere reduces significantly during annual Spring Festival holidays, whereby mobility is reduced and anthropogenic activities come to a halt. The COVID-19 lockdown during 2020 resulted in a considerable drop in vertical column densities (VCDs) of HCHO and NO2 during lockdown Level-1, which refers to strict lockdown, i.e., strict measures taken to reduce mobility (43% for NO2; 24% for HCHO), and lockdown Level-2, which refers to relaxed lockdown, i.e., when the mobility restrictions were relaxed somehow (20% for NO2; 22% for HCHO), compared with pre-lockdown days, as measured by the MAX-DOAS instrument. However, for 2019, a reduction in VCDs was found only during Level-1 (24% for NO2; 6.62% for HCHO), when the Spring Festival happened. The weekly cycle for NO2 and HCHO depicts no significant effect of weekends on the lockdown. After the start of the Spring Festival, the VCDs of NO2 and HCHO showed a decline for 2019 as well as 2020. Backward trajectories calculated using the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model indicated more air masses coming from the sea after the Spring Festival for 2019 and 2020, implying that a low pollutant load was carried by them. No impact of anthropogenic activity was found on O3 concentration. The results indicate that the ratio of HCHO to NO2 (RFN) fell in the volatile organic compound (VOC)-limited regime.

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