Quartz sand,activated carbon,resin, what are the roles of each?

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Quartz sand
Quartz sand, also known as silica sand, is a type of sand composed mainly of quartz particles.  It is a naturally occurring material and is one of the most common minerals found on Earth.  Quartz sand is primarily used in various industries due to its physical properties.

activated carbon
Activated carbon, also known as activated charcoal, is a highly porous form of carbon that has been processed to increase its surface area. It is produced from various carbonaceous materials, such as wood, coconut shells, or coal, through a process called activation.

resin
Resin is a broad term that refers to a class of solid or semisolid organic substances that are typically transparent or translucent and have a soft and sticky consistency. Resins are formed through the polymerization or condensation of monomers, resulting in a three-dimensional network of interconnected molecules.