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Billionaire Heloise Pratt has accused her estranged husband of "criminality" and acting "dishonestly" by paying himself and his charitable foundation $1m-plus without approval.

Meanwhile, the chief executive and two employees of Australian company Resolute Mining have been released from detention in Mali after Resolute struck a $US160m deal with the ruling military junta of the West African nation.

And meet the key figures behind Australia's top recycling start-ups , including the man behind a company which managed to convince a council to pay for services it already does.