Thompson F. Ediagbonya

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Size of particle is the pivotal determinant of the properties of particles and it has implications on formation, physical and chemical properties, transformation, transport, and removal of particles from the atmosphere and effects on humans and the environment. The most insidious particle size to humans and the environment is the Respirable particles (PM2.5). Respirable suspended particles (RSP) are particles whose diameter are 2.5 micrometres or less. The major route of these particles to the human body is through inhalation. These particles are usually formed by the reaction of chemicals in the atmosphere and some of these chemicals are sulphur dioxides and nitrogen oxides that are emitted from power plants, industry and automobiles. These particulate matter are the deadliest form of air pollutants due to their ability to penetrate deep into the lungs and bloodstream unfiltered, causing permanent DNA mutations, heart attack and premature death. The residence time of respirable particles in the air is usually high as a result of their lightness and low density.


PM2.5, Transport, Source, Formation, Particles, Deposition and Impact

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