Comparative studies on the efficiency of Lemna minor L., Eicchorniacrassipes and Pistiastratiotes in the phytoremediation of refinery waste water

Abstract

The studies involves a laboratory experiment on the comparative study on the efficiency of Lemna minor L., Eicchorniacrassipes and Pistiastratiotes in the phytoremediation of a stream polluted by waste water from kaduna refinery and Petro-chemical Company. Water samples were collected from Kaduna refinery effluent point, Romi up and Romi down from June to August, 2014. The physico-chemical parameters including some heavy metals were determined before and after the treatment to help in the determination of percentage reduction. The weight of the test plants was also determined before and after treatment for the determination of Net Primary Productivity (NPP). The research shows that Lemnaminoris the best plant to be use in the phytoremediation of water from Kaduna Refining and Petro-chemical Company since it shows the highest percentage reduction ability and the highest net primary productivity.

Keywords: Net Primary Productivity, Percentage Reduction, Romi Stream, Heavy Metals