scholarly journals Spatial And Temporal Variation Of Ambient Pm2.5: A Case Study Of Banepa Valley, Nepal

1970 ◽  
Vol 8 (1) ◽  
pp. 23-32 ◽  
Author(s):  
AK Majumder ◽  
VK Murthy ◽  
RM Bajracharya ◽  
SN Khanal ◽  
KMN Islam ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Monsoon Season ◽  
Winter Season ◽  
Spatial And Temporal Variation ◽  
Residential Areas ◽  
Pollution Levels ◽  
Commercial Area ◽  
Sampling Programme ◽  
Almost All

The study comprised of air quality monitoring during the day time at three municipalities of Banepa, Dhulikhel and Panauti in Kavre district of Nepal. In each of the municipalities three air monitoring stations were established representing industrial, commercial and residential areas. Particulate Matter (PM2.5) has been estimated from air sampling programme which spanned 7 months and a total of 126 days reflecting all the three seasons. The study found that during winter season the concentration of PM2.5 was more and among the areas commercial area noted highest level pollution. The seasonal trend in pollution levels show that winter > pre-monsoon > monsoon. The pollution concentration trend noted among the areas was commercial > industrial > residential on almost all the occasions except at pre-monsoon season between industrial and residential area in Banepa. This finding concludes that, commercial area of Banepa is more defined and is associated with higher particulate matter concentration compared to other areas. DOI: http://dx.doi.org/10.3126/kuset.v8i1.6036 KUSET 2012; 8(1): 23-32

scholarly journals NO2 Concentration in Banepa Valley, Nepal

1970 ◽  
Vol 4 (1) ◽  
pp. 1-11
Author(s):  
Ahmad Kamruzzaman Majumder ◽  
V Krishna Murthy ◽  
Sanjay Nath Khanal ◽  
Dhiraj Giri
Keyword(s):  
Air Quality ◽  
Winter Season ◽  
Maximum Level ◽  
Ambient Air ◽  
World Health ◽  
Quality Data ◽  
Residential Areas ◽  
Pollution Levels ◽  
Air Sampler ◽  
Commercial Area

This study comprised of air quality monitoring during the day time at three municipalities of Banepa, Dhulikhel and Panauti(Known as Banepa Valley) in Kavre district of Nepal. The study was conducted in order to establish a baseline air quality data for those municipalities as the first time ever in the district. In each of those municipalities three air monitoring stations were established representing predominant industrial, commercial and residential areas. Nitrogen Dioxide (NO2) had been estimated from air sampling programme which spanned 7 months and a total of 126 days reflecting winter, premonsoon and monsoon seasons. Low Volume Air (LVA) Sampler and Personal air sampler were used for sampling. UV spectrophotometer was used for estimation of the NO2. The study found that during winter season the concentration of NO2 was more and among the areas commercial area found to be highest level pollution. The over all mean, minimum and maximum level of NO2 was found to be 24.62μg/m3, 11.26μg/m3, 91.20μg/m3 in the Banepa valley. The seasonal trend in pollution levels show that winter > pre-monsoon > monsoon. The pollution concentration trend noted among the areas was commercial > industrial > residential on almost all the occasions. This finding conclude that, most of the time NO2 level are below the National Ambient Air Quality Standards (NAAQS) and World Health Organization (WHO) guideline representing little risk at present in Banepa Valley however commercial area of Banepa is more polluted and is associated with higher NO2 concentration compared to other areas. Keywords: NO2, Nepal, Banepa, air quality, personal air sampler DOI: 10.3126/kuset.v4i1.2878 Kathmandu University Journal of Science, Engineering and Technology Vol.4, No.1, September 2008, pp 1-11

scholarly journals A Study of Mean RSPM And SPM Levels at Selected Sites in Assam During the Recent Decade

2016 ◽  
Vol 10 (1) ◽  
pp. 5-20
Author(s):  
Tongdi Jamir
Keyword(s):  
Air Pollution ◽  
Particulate Matter ◽  
Suspended Particulate Matter ◽  
Monsoon Season ◽  
Winter Season ◽  
Recent Decade ◽  
Brahmaputra Valley ◽  
Exponential Increase ◽  
Suspended Particulate ◽  
Increasing Trend

Abstract Air pollution is an important issue around the world. Evidence of air pollution and its impact has been well established by the scientific communities. The effects of these changes on the smaller towns in Brahmaputra valley of Assam still need to be investigated. This study concludes that Suspended Particulate Matter (SPM) and Respirable Suspended Particulate Matter (RSPM) shows increasing trend in all the seasons except during the monsoon season but significant during the winter season. The study also reveals that RSPM remained above the standards throughout the decade, unlike SPM, which rose above the standards only during the years 2006, 2008 and 2009. It is also observed that during the rainy seasons Coefficient of Variation (CV) is high in maximum numbers of stations. The study concludes that exponential increase in population; vehicular activities, rainfall and wind direction as well as geographical conditions have indirectly influenced the pollutions.

scholarly journals Ambient air quality of Katra Town (J&K): A Study with Reference to atmospheric particulates

2013 ◽  
Vol 14 (1&2) ◽  
pp. 113-119
Author(s):  
Anil K. Raina ◽  
Anita Sharma
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Monsoon Season ◽  
Ambient Air ◽  
Ambient Air Quality ◽  
Residential Areas ◽  
Monsoon Period ◽  
Post Monsoon ◽  
The Impact

The monitoring of ambient air quality of Katra (one of the important town of Jammu from economic as well as religious point of view), at selected locations of residential areas, commercial areas and traffic crossings with respect to particulate matter (both respirable and non-respirable) has been conducted for a period of two years i.e. July 2010 – June 2012. Large variations in ambient particulate matter concentrations have been observed throughout the study period. Seasonally, the particulate matter exhibited low values during monsoon period and high values during post-monsoon period. The concentration of particulates (both respirable and non-respirable) in post monsoon season exceeded the concentrations than that of other seasons at most of the sites, thereby signifying the impact of local factors on pollutant concentrations, besides the impact of meteorological factors. Higher concentrations have been recorded in the year 2011-2012 as compared to 2010-2011 at all the sites except traffic crossings.

scholarly journals Application of Natural Carbon Isotopes for Emission Source Apportionment of Carbonaceous Particulate Matter in Urban Atmosphere: A Case Study from Krakow, Southern Poland

2020 ◽  
Vol 12 (14) ◽  
pp. 5777
Author(s):  
Miroslaw Zimnoch ◽  
Lucyna Samek ◽  
Leszek Furman ◽  
Katarzyna Styszko ◽  
Alicja Skiba ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Source Apportionment ◽  
Winter Season ◽  
Urban Atmosphere ◽  
Large Cities ◽  
Isotope Tracers ◽  
Natural Carbon ◽  
Carbon Load ◽  
Different Sources

Successful mitigation of air pollution in large cities requires information about the structure of emission sources and their contribution to total atmospheric load. The presented research demonstrates a possibility of application of isotope tracers for the estimation of contribution of different sources to the carbonaceous fraction of PM2.5 (Particulate Matter containing fraction below 2.5 μm) collected in the urban atmosphere of Krakow, Poland during the summer and winter seasons. Isotope mass balance approach was used to perform source apportionment analysis for those two seasons. The analysis showed that the dominant source of the carbonaceous fraction of PM2.5 in Krakow is coal burning during the winter season and biogenic emissions during the summer season. Sensitivity analysis revealed that the uncertainty of the percentage contribution of different sources to the overall carbon load of the analyzed PM2.5 fraction is in order of a few percent.

scholarly journals Indoor and Outdoor Measurements of Particulate Matter Concentrations: A Case Study Košice-Sever, Slovakia

2020 ◽  
Vol 15 (1) ◽  
pp. 77-88
Author(s):  
Eva Krídlová Burdová ◽  
Silvia Vilčeková ◽  
Peter Kapalo
Keyword(s):  
Particulate Matter ◽  
Winter Season ◽  
Mean Value ◽  
Particulate Matters ◽  
Indoor Pollution ◽  
Air Velocity ◽  
Indoor Pollutants ◽  
High Concentrations ◽  
Indoor And Outdoor

Abstract An occurrence of indoor particulate matters largely depends on outdoor pollution and its transportation indoors as well as on the presence of indoor pollution sources. Pollutants can flow from outdoor to indoor or indoor to outdoor under various conditions e.g. contribution of indoor pollutants to outdoor (in rural location with biomass fuel used for cooking) or outdoor to indoor in urban locations. This study aims to carry out an experimental investigation of particulate matter (PM) concentrations, temperature, humidity and air velocity during three days in winter season in Košice-Sever, Slovakia. Values of outdoor PM10 concentrations ranged from 12.58 μg/m3 to 6,627.51 μg/m3. Extremely high concentrations of PM10 were found near the traffic. Outdoor mean value of PM2.5 (21.82 μg/m3) did not exceed a permissible value of 25 μg/m3. Overloads by PM10 concentrations denote almost 108% and 2,270%. The indoor/outdoor (I/O) ratio was <1 for all fractions of particulate matters.

PREVALENCE OF PSEUDOINVERTA ORAIENSIS IN FRESH WATER FISH, CLARIAS BATRACHUS

2019 ◽  
Vol 25 (1) ◽  
Author(s):  
ADITYA NARAYAN
Keyword(s):  
Fresh Water ◽  
Monsoon Season ◽  
Winter Season ◽  
Uttar Pradesh ◽  
Summer Season ◽  
Clarias Batrachus ◽  
Fresh Water Fish ◽  
Water Fish

The present investigation deals with the prevalence of infection of cestode, Pseudoinverta oraiensis19 parasitizing Clarias batrachus from Bundelkhand Region (U.P.) India. The studies were recorded from different sampling stations of Bundelkhand region of Uttar Pradesh. For this study 360 fresh water fish, Clarias batrachus were examined. The incidence of infection, monsoon season (17.50%) followed by winter season (20.00%) whereas high in summer season (30.00%).

Nonwovens: Global Trends in World Economy, European Foreign Trade, and Selected Case Studies from Poland and Asian Brics Countries

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Zofia Wysokińska ◽  
Tomasz Czajkowski ◽  
Katarzyna Grabowska
Keyword(s):  
Case Studies ◽  
World Economy ◽  
World Market ◽  
Global Trends ◽  
Textile Materials ◽  
Brics Countries ◽  
Recent Trends ◽  
Almost All ◽  
Special Case

AbstractNonwovens are one of the most versatile textile materials and have become increasingly popular in almost all sectors of the economy due to their low manufacturing costs and unique properties. In the next few years, the world market of nonwovens is predicted to grow by 7%–8% annually (International Nonwovens & Disposables Association [INDA], European Disposables and Nonwovens Association [EDANA], and Markets and Markets). This article aims to analyze the most recent trends in the global export and import of nonwovens, to present two case studies of Polish companies that produce them, and to present one special case study of the market of nonwoven geotextiles in China and India, which are the Asian transition economies among the BRICS countries (Brazil, Russia, India, China, and South Africa).

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