I think Ed can be described by The Compound
I believe I have found your book.
http://www.amazon.com/The-Compound-S-A-Bodeen/dp/0312578601
I read a book very similar in 4th grade for a program our school hosted. I re-read the book a few days ago so I thought of it instantly when I saw your title.
Another Cover: http://www.amazon.com/The-Fallout-Compound-S-Bodeen/dp/1250050782/ref=pd_bxgy_14_img_2?ie=UTF8&refRID=0YSK82Y96EX4NFRXXNQH