The electrostatic precipitator are used in the prevention of –
**Core Concept**
Electrostatic precipitators are devices used to remove particles and pollutants from the air by applying an electrostatic charge to the particles, which then attract oppositely charged collection plates. This technology is commonly employed in various industries, including power generation, to control emissions and reduce air pollution.
**Why the Correct Answer is Right**
The correct answer is related to the control of particulate matter (PM) emissions from industrial sources, such as coal-fired power plants. Electrostatic precipitators work by charging the particles in the flue gas, which then attract the oppositely charged collection plates, allowing the particles to be removed from the gas stream. This process is particularly effective for removing particles in the range of 0.1-10 μm in diameter.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because electrostatic precipitators are not primarily used for controlling gaseous pollutants like sulfur dioxide (SO2) or nitrogen oxides (NOx). While they may incidentally remove some of these gases, their primary function is to remove particulate matter.
* **Option B:** This option is incorrect because electrostatic precipitators are not typically used for controlling water pollution. They are designed to remove particles from the air, not from water.
* **Option C:** This option is incorrect because electrostatic precipitators are not used for controlling noise pollution. They are specifically designed to remove pollutants from the air, not to reduce noise levels.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that electrostatic precipitators are a type of air pollution control device that can be used in various industries, including power generation, to reduce particulate matter emissions. This is a key concept in environmental health and occupational medicine.
**Correct Answer:** A.