Carbon column reactors are usually lined with epoxy or resin. Which option represents this lining material?

• A. Epoxy or Resin
• B. Concrete
• C. Steel
• D. Plastic

Answer: (A)

Lining a carbon column reactor needs a barrier that resists chemical attack, prevents leaks, and stays durable in a harsh wastewater environment. Epoxy or resin coatings fit this role because they cure into a tough, non-porous film that bonds well to common substrates and provides a smooth interior surface that’s easy to clean. This protective coating stalls corrosion and wear from aggressive components in the water and helps prevent fouling. Concrete is porous and can deteriorate under chemical exposure, steel can corrode without perfect protection, and while plastic linings exist, epoxy or resin coatings are the standard choice for their strong chemical resistance, durability, and reliable adhesion. So the lining material represented is epoxy or resin.