Modeling of the bioaccumulative efficiency of Pistia stratiotes exposed to Pb, Cd, and Pb plus Cd mixtures in nutrient-poor media

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Ergönül M. B., Nassouhi D., Atasağun S.

INTERNATIONAL JOURNAL OF PHYTOREMEDIATION, cilt.22, sa.2, ss.201-209, 2020 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22 Sayı: 2
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1080/15226514.2019.1652566
  • Dergi Adı: INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Agricultural & Environmental Science Database, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Communication Abstracts, EMBASE, INSPEC, MEDLINE, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.201-209
  • Anahtar Kelimeler: Bioaccumulation, macrophyte, phytoremediation, Pistia stratiotes, removal, HEAVY-METAL REMOVAL, AQUATIC MACROPHYTES, WATER LETTUCE, WASTE-WATER, PHOSPHATE REMOVAL, AQUEOUS-SOLUTIONS, PLANT-GROWTH, CADMIUM, PHYTOREMEDIATION, ACCUMULATION
  • Ankara Üniversitesi Adresli: Evet

Özet

The bioaccumulation capacity of water lettuce (Pistia stratiotes) including heavy metals has been well documented. However, its bioaccumulative efficiency for Pb, Cd, and Pb + Cd mixtures in nutrient-poor media is neglected. Therefore, the present study was aimed to investigate the bioaccumulative efficiency of the water lettuce by evaluating the bioconcentration factors (BCFs) and goodness-of-fit to regression models. Plants were exposed to various concentrations of Pb, Cd, and Pb + Cd mixtures in tap water for 1, 4, and 7 days. Heavy metal accumulation in whole plant tissue was measured with ICP-MS. The highest bioaccumulation rate was recorded at 1 day exposure tests for both metals as 14.9 mg/kg for Pb and 2.21 mg/kg for Cd. The BCFs for Pb and Cd ranged between 0.13 and 2.39 and 0.08 to 1.24, respectively. The modeling of the BCFs and exposure duration indicate that all of the models developed were significant. The R-2 values were higher for single metal exposure tests. The model fitted curves demonstrate the decrease in BCFs with increasing exposure duration in all groups. Our results indicate that water lettuce can be used to treat nutrient-poor media polluted with low levels of Pb, Cd, and Pb + Cd mixtures for short incubation periods.