Waste

Question 1

What are the traditional methods of waste disposal?

Answer 1

Landfilling, incineration

Question 2

What is the liquid waste of a landfill called?

Answer 2

Leachate

Question 3

What materials are used to prevent flow of leachate into water reservoirs and away from landfills?

Answer 3

Layers of clay and impermeable membranes

Question 4

What are possible byproducts of the incineration of wastes?

Answer 4

(NOx)s, SO2, aerosols, PAHs, acidic gases, heavy metals, and dioxins

Question 5

What are the most commonly recycled metals?

Answer 5

iron/steel, aluminum, copper

Question 6

What is the most beneficial aspect of glass recycling?

Answer 6

The quality of glass does not decline even after it has been recycled many times

Question 7

What are the most commonly recycled plastics?

Answer 7

PET and HDPE

Question 8

What is pyrolysis?

Answer 8

Heating plastics to high temperatures in the absence of oxygen to break them down into their constituent components

Question 9

What happens to the quality of fibers in paper as it is recycled?

Answer 9

Continual decline in quality

Question 10

What are the two categories that radioactive waste is divided into?

Answer 10

Low-level and High-level

Question 11

What differentiates low-level radioactive waste from high-level wastes?

Answer 11

Shorter half-life and lower radioactivity

Question 12

For what duration of time must low-level wastes be contained if undergoing near-ground disposal?

Answer 12

Up to 500 years