Match the following: Plastic Types and Applications
| Code | Plastic Type | Common Applications |
|---|---|---|
| P | High-density polyethylene (HDPE) | (iv) Geomembrane for landfill liner |
| Q | Low-density polyethylene (LDPE) | (i) Garbage bags, bubble packaging |
| R | Polyethylene terephthalate (PET) | (iii) Water bottles |
| S | Polystyrene (PS) | (ii) Pharmaceutical bottles, Styrofoam cups |
A particle dispersoid has 1510 spherical particles of uniform density. An air purifier is proposed to be used to remove these particles. The diameter-specific number of particles in the dispersoid, along with the number removal efficiency of the proposed purifier is shown in the following table:
The overall mass removal efficiency of the proposed purifier is ________% (rounded off to one decimal place).