The Impact of Traffic Related Air Pollution at Various Sites in Noida

Most Indian cities are experiencing rapid urbanization, sharp increase in traffic, trajectory growth, rapid economic development and industrialization, higher level of energy consumption. This unplanned urban and industrial development has led to the problem of air pollution. Majority of the country’s population is expected to live in cities within a span of next two decades. The rapid development in urban India has also resulted in a tremendous increase in the number of motor vehicles and in some cities this has doubled in the last decade. This is the main source of air pollution and poor ambient air quality impacting millions of dwellers. Commuters get exposed to traffic related particulate air pollution and has adverse health impacts with rise in respiratory disease, asthma, chronic obstructive, lung cancer, cardiovascular disease, heart attack and death [1].


Introduction
Most Indian cities are experiencing rapid urbanization, sharp increase in traffic, trajectory growth, rapid economic development and industrialization, higher level of energy consumption. This unplanned urban and industrial development has led to the problem of air pollution. Majority of the country's population is expected to live in cities within a span of next two decades. The rapid development in urban India has also resulted in a tremendous increase in the number of motor vehicles and in some cities this has doubled in the last decade. This is the main source of air pollution and poor ambient air quality impacting millions of dwellers. Commuters get exposed to traffic related particulate air pollution and has adverse health impacts with rise in respiratory disease, asthma, chronic obstructive, lung cancer, cardiovascular disease, heart attack and death [1].

Material and Methods
Study sites 1) Institutional site, Amity University Noida sector 126: This area marked as Sector-126, is for Institutional purpose as per the plan of Noida Authority. This area is suffering from air pollution due to vehicles and construction work.
Arterial road site, Noida sector 18: The Noida sector 18 is a metro station on the blue line of the Delhi metro. The massive mall The Great India Place is located just off the sector 18 market in Noida [2].
2) Residential site, Arun Vihar Noida sector 37: It has been registered as a society under the Societies Registration Act, 1860, as amended and made applicable to the state of Uttar Pradesh from time to time by the concerned authorities. It is spread over 6.5 acres of land provided by Noida Authority. Arun Vihar is one of the popular residential developments in Sector-37, neighborhood of Noida. It is among the completed projects of its Builder. It has lavish yet thoughtfully designed residences.
Noida-Greater Noida Expressway: The Noida-Greater Noida

Instruments
Instruments used to assess the concentration of pollutants are: 1) Micro aethalometer: The microAeth Model AE51 is the world's first ever real-time, pocket-sized Black Carbon aerosol monitor. The instrument can operate continuously for upto 24 hours on a single battery charge and can be externally powered by the included wall power adapter, or an additional external battery option for longer run times. 2) CO personal monitor (lengan): A carbon monoxide detector is a device that detects the presence of the carbon monoxide (CO) gas in order to prevent carbon monoxide poisoning. 3) Dust monitor (grim): In dust monitor (grim), sample air is led directly into the measuring cell via the aerosol. The particles in the sample air are being detected by light scattering inside the measuring cell. The scattering light pulse of every single particle is being counted and the intensity of its scattering light signal classified to a certain particle size. In this way, concentration of particulate matter of different size is measured [4].

Questionnaire survey and traffic sampling
Traffic pollutant concentration black carbon, carbon monoxide, particulate matter were measured along with traffic count of two wheelers, three wheelers, four wheelers, low commercial vehicle, high commercial vehicle from morning to evening at selected road side locations in Noida. Questionnaire survey at all the selected sites was done to find out how the health of commuters is being affected due to traffic related air pollutants. Questionnaires included questions on the basis of age, sex, occupation of people and we estimated the no. of people suffering from the symptoms of asthma, respiratory disease, lung cancer, etc. (Tables 1-4).

Results and Discussion
From Table 5 the average concentration of black carbon were found to be 25107.82 (ng/m 3 ), 16829.65 (ng/m 3 ), 23112.56 (ng/m 3 ) at Noida sector 126, Noida Sector 18, Noida-Greater Noida Expressway, respectively. The concentration were compared and it was found that average concentration of Black carbon level obtained at Noida sector 126 was maximum and mean BC concentration varies from 68707.82-8760.76 (ng/m 3 ). This is due to heavy traffic, vehicles and diesel combustion [5][6][7][8].
From the Figure 1 and Table 6, we can conclude that mean PM10 concentration at Noida sector 126 was 1737.16 ug/m 3 which is more than ten times higher than the standard value. Similarly mean PM 2.5 concentration is ten times higher than the standard value. In Noida,     institutional site is highly affected due to construction work and road traffic.
Highest traffic was found at Noida-Greater Noida Expressway but the conc. of pollutants like Black Carbon, PM10, PM2.5 and PM1 was maximum at Noida sector 126 (Amity University). This is due to the road digging, building construction, dust particles in air and stagnant traffic at road sides (Table 7 and Figure 2). Black carbon was highly well correlated with PM2.5 and PM1, it shows that BC, PM10 and PM1 originated from the same source. BC was negatively correlated with CO, this shows that for BC and CO generation sources were different (Table 8).
PM2.5 was highly related with PM1 which indicates that both the pollutants were generated from the same source. BC was positively related with PM10, PM2.5 and PM1 whereas BC was negatively correlated with CO. BC and CO generated from different source (Table 9).
At Noida-Greater Noida Expressway PM2.5 were highly related with PM1 which indicates that both the pollutants were generated from the same source. BC was positively related with PM2.5, PM1 whereas BC was negatively correlated with CO. BC and CO generated from different source (Table 10).
From the above mentioned graph (Figure 3), it is observed that PM10 conc. was found to be maximum above 8000 ug/m 3 in morning 8:00-10:00am at Noida Sector 126, Amity University, Institutional site in comparision to all other sites. This is due to stagnant traffic, vehicular exhaust, road digging, building construction, etc., and in afternoon conc. of pollutants was low due to less traffic, dust.
At Noida-Greater Noida, CO (PPM) conc. was high in afternoon (12:00-2:00 pm) in comparision to all other sites, but the traffic was found to be maximum in morning, this is due to materiological effect [9,10]. Black carbon was found to be maximum at Amity University (institutional site) in morning (08:00-10:00) but the traffic was high at Noida-Greater Noida Expressway in morning, this was due to the stagnant traffic at Amity University (Noida sector-126) whereas there was running traffic at Noida-Greater Noida Expressway (Figure 4).  Table 6: National ambient air quality standards.

Result obtained from questionnaire survey
Questionnaire survey at all the selected sites was done to find out how the health of commuters is being affected due to traffic related air pollutants. Questionnaires included questions on the basis of age, sex, occupation of people and we estimated the no. of people suffering from the symptoms of asthma, respiratory disease, lung cancer, etc.

Conclusion
Relevant information was gathered from questionnaire survey. It was observed that 80% of the people were suffering from eye or skin irritation at Noida sector 126 where the black carbon and PM10, PM2.5, PM1 conc. were found maximum in comparision to all other sites.