Acidic mine drainage water poses high risk to environment and threatens human health as it often contains elevated concentrations of heavy metals.There are extensive areas of land which are impacted by acidic mine drainage that need to be revegetated and could potentially be used for growing energy plants.Traditional phytoremediation method may be unsuccessful because the pH of some mine soils and mine drainage can reach 2.0 which will lead to death of most plants.Thus screening and using acid tolerant plants as pioneer plants to rehabilitate waste mine soil was thought to be an effective way for acid rock site restoration.In part one of this study,two Acacia species,Acacia auriculiformis and A.confusa and one Melaleuca species,Melaleuca armillaris,were evaluated for their tolerance level.Seedlings of the three plant species were potted in clean quartz-sand with Hoagland solution and treated at eight pH levels: 1.7,2.0,2.5,3.0,3.5,4.0,4.5 and 5.0 for one month.