?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=G.C.&rft.aulast=Heng&rft.au=Heng%2C+G.C.&rft.issue=1&rft.volume=11&rft.issn=09726268&rft.atitle=Optimization+of+photo-fenton+treatment+of+mature+landfill+leachate&rft.pages=65-72&rft.title=Nature+Environment+and+Pollution+Technology&rft.date=2012&rft.genre=article