desalination Flashcards
concentration gradient
2 diff concemtrations on either side of barrier
diffusion
particle movement from areas of high concentration to lower concentration. ( motion of molecules)
permeable membrane
some particles flow from high conc to low conc through membrane
osmosis
movement of a solvent thru semi permeable membrane into a solution of higher solute conc to equalize conc of solute on the 2 sides of membrane
reverse osmosis
forcible movement of water from the are of high solute conc to an area of low conc or against natural conc gradient
desalination
purify sea water to drinkable water
distillation
heating a mixture amd condemsing the vapor to produce a more nearly pure substance
advantage of distillation
get rid of impurities and pathogens
disadvantage of distillation
water becomes devoid of minerals
what is tds
total dissolved solids
potable water requirements
drinkable water that is pathogen free desirable taste odor colour turbidity no harmful chemicals
requirement of potable water
free of pathogens
desirable taste odor smell color turbidity
no harmful chemicals
desalination process
reverse osmosis types
membrane separation process
thermal type
permeate
product resulting from membrane processes
1-2% salt in the source passes
distillate
pure
total dissolved solids
