Aquaman has a major speed advantage, but Mandarin is pretty darn heavily armed. I don't know enough about his capabilities (specifically durability) to say for sure, but it seems to me that the Mandarin would be a bit too tough for Arthur. That being said, with his telepathy and speed, I think it is entirely possible that Aquaman could take a few.
__________________ "One can do worse than be a swinger of birches..."
-Robert Frost
martial arts/ice/darkforce/electromagnetic energy/flame/matter manip/wind/electric/disinentergration/mind altering ring hmmm....and he jests slapd around by IronMan. I still give it to Aqua man hes got that fire like a drunk irishman during fights
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Drivin a fast car listening to Deftones baby. Cred to Rewmac for this sick sig!
Or Aquaman uses his telepathy and gets Mandarin to use the rings against him like how Aquaman over-rided the willpower of a Green Lantern and made him cut off his own head with his own ring.