Note the word you want to use is efflorescence not effervescence.
From: Stephen Webb <stephen@newlifemarblerestoration.com> To: Stone and Tile PROS Technical Support <sccpartners@stoneandtilepros.com> Sent: Wednesday, September 25, 2013 2:09 PM Subject: [sccpartners] effervescence
Is there any effective treatment against effervescence on polished concrete? Slab is 10 months old. Someone else polished it and sealed it with stainproof. Thanks Stephen Webb