Lecture 2

Question 1

Give 2 examples of truly new / emerging chemicals:

Answer 1

1) Chemicals newly introduced into commerce (ex: pesticides, drugs)
2) New manufacturing processes (ex: quantum dots into LCD screens)

Question 2

Give 2 examples of better detection:

Answer 2

1) New advances in chemical analysis (lower detection limits, non-target identification, new methods)
2) Exploring unstudied media (ex: some foods, ecosystem components

Question 3

Emerging contaminants are important because ________________________

Answer 3

the risk they pose to human health and the environment is not yet fully understood

Question 4

T or F: Sometimes chemicals that had not previously been detected (or were previously found in far lesser concentrations) are discovered in the water supply. These chemicals are known as contaminants of emerging concern

Answer 4

T

Question 5

T or F: Endocrine disruptors are substances that may interfere with the function of hormones in the body

Answer 5

T

Question 6

Give 2 examples of emerging contaminants:

Answer 6

1) PCPs (pharmaceuticals, personal care products)

2) EDCs (endocrine disrupting compounds)

Question 7

T or F: Many chemicals possess high biological activity

Answer 7

T

Question 8

T or F: Most attention is towards endocrine disruptors and antibiotics leading to antimicrobial resistance

Answer 8

T

Question 9

Name 3 out of the 30 most frequently detected organic wastewater contaminants out of 95 measured:

Answer 9

• cholesterol
• caffeine
• acetominophen

Question 10

Pseudo-persistence of chemicals is due to:

Answer 10

continuous exposure across the lifespan and multiple generations

Question 11

Cumulative impacts of chemical mixtures are _________

Answer 11

not known