title: Bioaccumulation and toxicity assessment of irrigation water contaminated with boron (B) using duckweed (Lemna gibba L.) in a batch reactor system.
abstract: The present study assesses ability of Lemna gibba L. using a batch reactor approach to bioaccumulation boron (B) from irrigation waters which were collected from a stream in largest borax reserve all over the world. The important note that bioaccumulation of B from irrigation water was first analyzed for first time in a risk assessment study using a Lemna species exposed to various B concentrations. Boron toxicity was evaluated through plant growth and biomass production during phytoremediation process. The result from the present experiment indicated that L. gibba was capable of removing 19-63% B from irrigation water depending upon contaminated level or initial concentration. We also found that B was removed from aqueous solution following pseudo second order kinetic model and Langmuir isotherm model better fitted equilibrium obtained for B phytoremediation. Maximum B accumulation in L. gibba was determined as 2088mgkg-1at average inflow B concentration 17.39mgL-1at the end of the experiment. Conversely, maximum bioconcentration factor obtained at lowest inflow B concentrations were 232 for L. gibba. The present study suggested that L. gibba was very useful B accumulator, and thus L. gibba-based techniques could be a reasonable phytoremediation option to remove B directly from water sources contaminated with B.
authors: Faculty of Science and Letters, Department of Biology, Aksaray University, Aksaray, Turkey. Electronic address: octurker@aksaray.edu.tr.
authors: Onur Can
authors: OC
authors: Türker
authors: Faculty of Science, Department of Biology, Anadolu University, Eskişehir, Turkey.
authors: Anıl
authors: A
authors: Yakar
authors: Faculty of Science, Department of Biology, Anadolu University, Eskişehir, Turkey.
authors: Nurcan
authors: N
authors: Gür
mesh_terms: D057914:Agricultural Irrigation; D029064:Araceae / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D001895:Boron / Q000378:metabolism* / Q000633:toxicity; D014874:Water Pollutants, Chemical / Q000378:metabolism* / Q000633:toxicity
chemical_list: D014874:Water Pollutants, Chemical; D001895:Boron
keywords: Bioaccumulation; Boron removal; Boron toxicity; Lemna gibba; Phytoremediation