Bioaccumulation and toxicity assessment of irrigation water contaminated with boron (B) using duckweed (Lemna gibba L.) in a batch reactor system


TÜRKER O. C., Yakar A., Gur N.

JOURNAL OF HAZARDOUS MATERIALS, vol.324, pp.151-159, 2017 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 324
  • Publication Date: 2017
  • Doi Number: 10.1016/j.jhazmat.2016.10.044
  • Journal Name: JOURNAL OF HAZARDOUS MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.151-159
  • Keywords: Boron removal, Bioaccumulation, Phytoremediation, Lemna gibba, Boron toxicity, CONSTRUCTED WETLANDS, MINE EFFLUENT, REMOVAL, GROWTH, PHYTOREMEDIATION, ACCUMULATION, TOLERANCE, CAPACITY, DENSITY, PLANTS
  • Anadolu University Affiliated: Yes

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 2088 mg kg(-1) at average inflow B concentration 17.39 mg L-1 at 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. (C) 2016 Elsevier B.V. All rights reserved.