So I just finished my experiment today to test the viability of banana peel based fertilizer and figured I would share it.
My Method-
1. 7 Banana peel's were burned occasionally applying rubbing alcohol to help keep it hot.
2. 6% vinegar was acquired
3. The banana peel ashes were weighed and came out to 22.93 grams of ash.
4. I approximated there to be 9.63 grams of K2CO3 (potassium carbonate) in the banana peel's and did my measurements based on this. This was incorrect and the total weight is yet to be discovered though "eyeballing it" I would say it will be more or less a gram. Im not sure if I lost some during filtering or to spillage or if im actually 100% wrong on the weight but I will post it when it's dry so stay posted.
5.To the ash 161 grams of 6% vinegar was added and a quick and hot reaction was observed.
NOTE: This was small scale but if I had more ash and vinegar, it would have gotten very hot very quickly and would have melted through my plastic reaction vessel so add this VERY SLOWLY.
6. This was filtered 3 time through toilet paper (I had nothing better) until an apple juice colored liquid was left.
7. I evaporated this but it could have been boiled off.
What was recovered was dirty crystals of potassium acetate of an (will update once completely dry) unknown weight.
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From what I have heard potassium acetate is the best absorbing potassium salt and im assuming the most ecofriendly due to the acetate being an organic molecule and more likely to break down into a simple carbon based molecule. I may be wrong and by all means, correct me if I am. Also, just a quick side note: If you want to purify and get rid of any other water soluble contaminants (shouldn't be a problem if your using it for plants) my thoughts are that you could dissolve the chemical in a small amount of water and add acetone slowly until potassium acetate crystallizes out and the water/acetone solution could be disposed of in the appropriate way.
If I made any mistakes, please let me know and of course don't forget, this was educational purposes only and please don't attempt to recreate unless you're confident in your ability's and if you do, im not responsible for any harm that may come to you or your property or anyone else.
Thanks for reading
-The Clam-