The study about Salvinia molesta D.S. Mitchell and Scirpus grossus L.f. effect on phytoremediation of petroleum liquid waste has been conducted from August to September 2013. The objectives of this study were (1) to find out the phytoremediation ability of two species i.e. Salvinia molesta D.S. Mitchell and Scirpus grossus L.f. and also their combination in declining of total petroleum hydrocar…