Ion Exchange

Question 1

What are the 4 stages of ion exchange softening?

Answer 1

Service, Backwash, Brine, Rinse

Question 2

What is exchanged with the salt as the water passes though the ion exchange?

Answer 2

Mg ( magnesium ) & Ca ( calcium )

Question 3

What remains unchanged during the ion exchange process?

Answer 3

pH

Question 4

For IE ( ion exchange ), which is the softening stage?

Answer 4

Service

Question 5

When should the IE unit be regenerated?

Answer 5

When Ca & Mg

/hardness appears in effluent

Question 6

What is the third stage of the IE?

Answer 6

Brine

Question 7

What will happen if there is soluble iron and manganese in the feed water to ion exchange?

Answer 7

They’ll be removed

Question 8

What will happen if there is insoluble iron in the feed water to the IE unit?

Answer 8

Fe & Mn will clog resins

(iron)&(manganese

Question 9

What is used to regenerate an ion exchange unit?

Answer 9

Brine

Question 10

If the resins are clogged with iron, what adjustment must be made to backwash rates?

Answer 10

increase backwash rates

Question 11

What will break down the ion exchange resins?

Answer 11

C12

Question 12

Convert 362mg/L to gpg.

17.1mg/L+1gpg

Answer 12

divide 362 by 17.1

Question 13

Convert 25gpg tp mg/L.

Answer 13

multiply 25 by 17.1