Gaseous Pollutant

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Importance Of Gaseous Pollutant Monitoring

To monitor the contribution of vehicular emission and predict the environment for the future project, It’s necessary to monitor NO2. If CO levels are high it can cause serious tissue damage or result in death. To avoid these circumstances, monitoring of CO is crucial for public health. Because of the chemical reaction between Nitrogen(NOx) and Volatile Organic Compound (VOCs) in sunlight, creates ground level ozone which is the main pollutant to generate SMOG in ambient air.

Nitrides(NO2, NO)

About
The nitric oxide (NO) molecule is reactive and unstable. In ambient air, it reacts with oxygen to form the toxic nitrogen dioxide (NO2).

Sources 
Thermal Power Plants, Vehicle Fuel Emission, Industries, Fertilizers, Nitrogenous animal and vegetable matter.

Health Hazards
Respiratory disease, such as emphysema and bronchitis, and it can aggravate existing heart disease, leading to increased hospital admissions and premature death. Nitrogen oxide causes a multitude of symptoms, primarily in the lungs but also in other organs such as the spleen and liver.

Regulation
The U.S. Environmental Protection Agency (EPA) has set safety levels for environmental exposure to NO2 at 100 ppb, averaged over one hour, and 53 ppb, averaged annually.

CO

About
Carbon monoxide (CO) is an extremely toxic gas resulting from incomplete combustion of carbon and carbonaceous products.

Sources
Thermal Power Plants, Vehicle Fuel Emission, Open Fire, Solid Waste Sites etc.

Health Hazards
Carbon monoxide is colorless, odorless, and tasteless, but highly toxic. Breathing Carbon monoxide causes dizziness, shortness of breath, nausea. The excessive amount of CO can replace oxygen in your red blood cells and damage tissues or even cause death.

Regulation 
As per US EPA, permissible exposure limit for CO is 50 ppm as an 8-hour time-weighted average.

O3

About
Ozone (O3) is a highly toxic corrosive substance and a common pollutant. In low concentration, it is a normal component of ambient air. Highly concentrated it is an aggressive irritant gas and at ground level, it affects humans and nature.

Sources
Naturally through reaction of nitrogen oxides, hydrocarbons, and sunlight; Industrial and vehicular emission.

Health Hazards
Ground level ozone harms lung function and irritates the respiratory system. It also causes premature death, asthma, bronchitis, heart attack, and other cardiopulmonary problems.

Regulation
U.S. Occupational Safety and Health Administration (OSHA) has established a permissible exposure limit (PEL) of 0.1 μmol/mol calculated as an 8-hour time weighted average. Higher concentrations are especially hazardous and National Institute for Occupational Safety and Health (NIOSH) has established an Immediately Dangerous to Life and Health Limit (IDLH) of 5 μmol/mol