User blog comment:Sosuke Aizen008/Maybe Starrk or Szayel or Nnoitra./@comment-11003280-20130810065146/@comment-15180946-20130812184753

I doubt arrancars can be purified by a zanpakuto because they are aware of what they are doing, so its the same as committing a crime as a human. Presumably they are all sent to Hell (Like Szayelaporro and Aaroniero - its already been shown they are in hell)