Which of the following treatments reduces the salinity of water?
a. Alum coagulation, flocculation, and settling
b. Carbon filtration
c. Reverse osmosis
d. Electrolysis
1
Only a and b
2
Only b and c
3
Only c and d
4
Only b, c and d
a. Alum coagulation, flocculation, and settling
b. Carbon filtration
c. Reverse osmosis
d. Electrolysis