You can easily get read of an unwanted aldehyde, by washing (extracting) your organic solution several times (say 4-5 times) with an equal volume of a saturated aqueous sodium bisulfite solution. I have done this and it works perfectly.
Hint 1: Each washing (extraction) must take 5 minutes, at least.
Hint 2: If your product has the tendency to pass into the aqueous phase, you use lower amounts of saturated aqueous sodium bisulfite solution and wash for 3 times.
Hint 3: Saturated aqueous sodium bisulfite solution (NaHSO3) is prepared by adding sodium metabisulfite powder (Na2S2O5) into water until precipitation.
But attention! Solvation of NaHSO3 and Na2S2O5 in water, are endothermic and cool the solution, which decreases their solubility. Thus, precipitated NaHSO3 solutions that are quickly prepared, are not really saturated though seeming to be.
In order to avoid this, you add slowly small portions of Na2S2O5 into water and wait until the temperature equilibrates with the ambient one (by putting your hand on the flask). Then, repeat it several times until a precipitation that doesn’t get colder, any more.
It demands patience.
Hint 4: Do not warm (Le Chatelier principle, etc.) during preparation because 2 NaHSO3 thermally decompose to Na2SO3 + SO2 + H2O.