水中锶的来源及处理
Source
Strontium (Sr) is in the same family as calcium and magnesium, and is one of the
polyvalent (多价的)earth metals that shows up as hardness in the water. The
presence of strontium is usually restricted to areas where there are lead ores,
and its concentration in water is usually very low. Strontium sulfate is a
critical reverse osmosis membrane foulant(污垢阻塞),
dependent on its concentration. There is no MCL for strontium listed in the US
EPA Drinking Water Standards.
Treatment
Strontium can be removed with strong acid cation exchange resin. It can be in
sodium form as in a water softener or the hydrogen form as in the cation portion
of a two-column deionizer. Reverse osmosis will also reduce strontium but as
stated above strontium sulfate is a membrane foulant.
