Hi,
- in the trash can, select all the items (Cmd + a)
- drag them to the bottom of the side bar of iPhoto : this will create a new album
- from there, select all (or what you want), File / Export (choose the quality/size, or "original"), choose the destination (for example Desktop/new folder).
- check all worked well (open the new folder)
- if ok : quit iPhoto, then relaunch iPhoto while holding down the Option key
- select "new library"
- drag the "new folder" from the desktop to iPhoto window
Done.