Hi Moose422,
to All Things Plants!
The pieces of plant that still have a bit of root attached (your last two photos) look like they are still viable so you should definitely give it a try! The largest clump in the next to last picture looks to have extremely wet soil remaining around the base so I'd rinse every bit of that away and dry the plants completely - you can use paper towels and even lay them out on paper towels for awhile to dry, then pot them all up into a small pot containing some well draining soil, either commercial potting soil with a lot of perlite added for drainage or you can add orchid bark mix to the soil which will allow more air circulation around the roots. Be sure your container isn't too large for the size of the plant and that it has good drainage in the bottom for the excess water to escape. When watering, don't let the pot sit in a tray of accumulated water for long or the roots will get saturated, causing root rot and the eventual demise of the plant.
I've been growing Peace Lily for years and like all of my other plants, I grow them in a mixture of potting soil with lots of orchid bark mixed in ... it makes for a chunky, airy, well draining potting medium. My Peace Lilies stay out on my screened porch year round, but I live in Florida so my plants do receive extra moisture from all the humidity in the air. I am very lax about watering so mine will totally wilt at times with the leaves flopped over the edges of the pots ... but they perk up once I've soaked them with the hose. Good luck with your Peace Lily and I hope you are able to revive it for many years of enjoyment. Condolences to you, your wife and family on the loss of her step-father.
Peace Lilies (Spathiphyllum)
Peace Lily (Spathiphyllum wallisii)
