Civil Engineering: Air Pollution Control

Vehicle emissions, particularly from diesel engines, are a major source of air pollution in urban areas, contributing to high levels of particulate matter, nitrogen oxides, and hydrocarbons.

Baghouses are commonly used to control particulate matter emissions from industrial sources. They work by filtering the particulate matter from the air stream using a fabric filter.

Catalytic converters are designed to reduce nitrogen oxide emissions from vehicle exhaust by converting them into less harmful substances, such as nitrogen and oxygen.

Scrubbers are commonly used to control sulfur dioxide emissions from power plants. They work by removing sulfur dioxide from the flue gas using a liquid or solid absorbent.

Exposure to ozone at ground level can cause respiratory problems, such as asthma, bronchitis, and emphysema. It can also irritate the eyes, nose, and throat.

Thermal oxidizers are commonly used to control VOC emissions from industrial sources. They work by incinerating the VOCs at high temperatures, converting them into carbon dioxide and water vapor.

Exposure to particulate matter can cause respiratory problems, such as asthma, bronchitis, and emphysema. It can also increase the risk of cardiovascular disease and cancer.

Catalytic converters are commonly used to control nitrogen oxide emissions from vehicles. They work by converting nitrogen oxides into less harmful substances, such as nitrogen and oxygen.

Exposure to carbon monoxide can cause neurological disorders, such as headaches, dizziness, and confusion. It can also impair coordination and reaction time.

Water spraying is a common method of controlling air pollution from construction activities. It helps to suppress dust and other particulate matter from becoming airborne.

Exposure to lead can cause neurological disorders, particularly in children. It can also impair cognitive function and development.

Crop rotation is a common method of controlling air pollution from agricultural activities. It helps to reduce the buildup of pests and diseases, which can lead to the use of pesticides and fertilizers that can contribute to air pollution.

Exposure to mercury can cause neurological disorders, such as tremors, memory loss, and impaired coordination. It can also affect the kidneys and liver.

Energy-efficient appliances can help to reduce air pollution from residential sources by consuming less energy, which in turn reduces the emissions of pollutants from power plants.

Exposure to dioxins can increase the risk of cancer, particularly cancer of the lungs, liver, and intestines.