The ones in the article are 'regular' matter that is in the accretion disk. That's ejected by centripetal force. Gets sucked in close and some of it loses angular momentum and falls into the hole. Some of it gains that same momentum and is flung out.
As for replicating particle creation, I don't think so, but I'm not 100% sure of this stuff. I went back and edited the original because your questions are triggering some vague memories that I might be conflating different things.