I suggest you dump your pickle into a 5 gallon plastic drum and let it evaporate. This can be dropped of at your local toxic chemical pickup if offered by your city or county. Check with local waste disposal requirements. Much may depend on the pickle you are using.
Some folks neutralize it with baking soda first. This is messy and not needed.
The same can be done with Liver of sulphur. You probably will have little or no residue with the Liver of Sulphur since most of the compounds will volitize.