Option 1: Silicones are not suitable for water purification. Silicones are synthetic compounds derived from silicon and oxygen. They are commonly used in various industrial applications, but they are not effective for water purification purposes.

Option 2: Zeolites are suitable for water purification. Zeolites are a type of crystalline aluminosilicate mineral that has a porous structure. They have the ability to adsorb and exchange ions, making them effective for removing various contaminants from water. Because of their high surface area and ion-exchange capacity, zeolites are commonly used in water treatment processes to remove heavy metals, ammonia, and other pollutants from water.

Option 3: Asbestos is not suitable for water purification. Asbestos is a naturally occurring mineral that has been widely used in the past for its heat and chemical resistance properties. However, it is now known to be a hazardous material that can cause serious health issues when inhaled. It is not used for water purification purposes due to its health risks.

Option 4: Quartz is not suitable for water purification. Quartz is a common mineral found in many rocks and soils. While it is chemically inert and does not react with water, it does not have any specific characteristics that make it suitable for water purification