title: Phytoremediation potential of Lemna minor L. for heavy metals.
abstract: Phytoremediation potential of L. minor for cadmium (Cd), copper (Cu), lead (Pb), and nickel (Ni) from two different types of effluent in raw form was evaluated in a glass house experiment using hydroponic studies for a period of 31 days. Heavy metals concentration in water and plant sample was analyzed at 3, 10, 17, 24, and 31 day. Removal efficiency, metal uptake and bio-concentration factor were also calculated. Effluents were initially analyzed for physical, chemical and microbiological parameters and results indicated that municipal effluent (ME) was highly contaminated in terms of nutrient and organic load than sewage mixed industrial effluent (SMIE). Results confirmed the accumulation of heavy metals within plant and subsequent decrease in the effluents. Removal efficiency was greater than 80% for all metals and maximum removal was observed for nickel (99%) from SMIE. Accumulation and uptake of lead in dry biomass was significantly higher than other metals. Bio-concentration factors were less than 1000 and maximum BCFs were found for copper (558) and lead (523.1) indicated that plant is a moderate accumulator of both metals. Overall, L. minor showed better performance from SMIE and was more effective in extracting lead than other metals.
authors.affiliation: a Department of Plant and Environmental Protection, PARC Institute of Advanced Studies in Agriculture, National Agricultural Research Center , Islamabad , Pakistan.
authors.forename: Syeda Huma
authors.initials: SH
authors.lastname: Bokhari
authors.affiliation: a Department of Plant and Environmental Protection, PARC Institute of Advanced Studies in Agriculture, National Agricultural Research Center , Islamabad , Pakistan.
authors.forename: Iftikhar
authors.initials: I
authors.lastname: Ahmad
authors.affiliation: b Department of Natural Resource Management, PARC Institute of Advanced Studies in Agriculture, National Agricultural Research Center , Islamabad , Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Mahmood-Ul-Hassan
authors.affiliation: a Department of Plant and Environmental Protection, PARC Institute of Advanced Studies in Agriculture, National Agricultural Research Center , Islamabad , Pakistan.
authors.forename: Ashiq
authors.initials: A
authors.lastname: Mohammad
mesh_terms: D029064:Araceae / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019216:Metals, Heavy / Q000378:metabolism*; D010154:Pakistan; D012722:Sewage; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D019216:Metals, Heavy; D012722:Sewage; D014874:Water Pollutants, Chemical
keywords: duckweed; heavy metals; municipal and industrial effluents; phytoremediation; removal efficiency