lect 20

Question 1

what are the inorganic contaminants in drinking water?

Answer 1

-lead
-cadmium and mercury (cumulative poisons)
-aluminum
-sodium
-organotin compounds

Question 2

what is lead in drinking water?

Answer 2

Question 3

what do Saskatchewan residents have high levels of?

Answer 3

some of the highest levels of lead-tainted water in Canada
-regina average is 26 ppb
-saskatoon average is 58 ppb

READ ARTICLE on design of sustainable biomaterial composite adsorbents for point-of-use removal of lead ions from water

Question 4

what is cadmium in drinking water?

Answer 4

Question 5

what is mercury in drinking water?

Answer 5

Question 6

what happens in grassy narrows?

Answer 6

Question 7

where did the metal come from in grassy narrows?

Answer 7

where did Hg come from?

Question 8

what is the electrochemical cell of chlorine used in grassy narrows?

Answer 8

Question 9

what is aluminum in drinking water?

Answer 9

Question 10

what is sodium in drinking water?

Answer 10

Question 11

what is aluminium acetylsalicylate?

Answer 11

Question 12

Question 13

what are organotin compounds in drinking water?

Answer 13

Question 14

what are the organics in the drinking water supply?

Answer 14

Question 15

what was the hudson river cleanup?

Answer 15

Question 16

how do we treat organics in drinking water?

Answer 16

Question 17

what is osmotic pressure?

Answer 17

Question 18

what is the graph of osmotic pressure?

Answer 18

Question 19

what is reverse osmosis?

Answer 19

Question 20

what are microplastics?

Answer 20

plastic particles that possess sizes of <5mm
-point source: personal care products such as exfoliating shower gel, toothpaste, and makeup, which all wash down the drain
-in 2012, 4,360 tons of microbeads were used in all EU countries
-accumulation of such quantities (93-236k tons) floating in the oceans predicted in a recent study environmental research letters (37x greater than previous estimates)
-in the USA, 8 trillion microbeads enter aquatic environments per day

Question 21

what are the microplastic graphs?

Answer 21

Question 22

what are the effects of microplastics on organisms?

Answer 22

Question 23

what is the pollution and other effects of microplastics?

Answer 23

-chemicals comprising microplastics are causing reproductive complications in oysters
-chemical toxins such as DDT and BPA have been found to adhere to microplastic particles

how does this relate to our course?
-president obama signed a bill banning the use of microbeads in all personal care products (december 2015)
-microplastics have been banned in canada
-the ocean cleanup project, which proposes a method to remove 70,000 metric tons of plastic from the oceans within 10 years