Iron Oxide-Polyaniline Nanocomposite as a Magnetic Adsorbent for the Magnetic Solid-Phase Extraction (MSPE) of Lead(II), Cadmium(II), Copper(II), and Cobalt(II) from Water Samples with Determination by Flame Atomic Absorption Spectrometry (FAAS)

Caylak O., Elyas Sodan N., Solangi S. A., ELÇİ Ş. G., Elci L.

Analytical Letters, 2025 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1080/00032719.2025.2531184
  • Dergi Adı: Analytical Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Food Science & Technology Abstracts, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Anahtar Kelimeler: Flame atomic absorption spectrometry (FAAS), heavy metal ions, iron oxide-polyaniline nanocomposite (Fe3O4@PANI-NC), magnetic solid phase extraction (MSPE), preconcentration
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In this study, polyaniline (PANI) polymer was used to modify the surface of the iron oxide magnetic nanoparticles (Fe3O4-MNPs). To extract heavy metal ions such as Pb(II), Cd(II), Cu(II), and Co(II) from seawater and tap water samples, the newly developed nanocomposite (NC) was investigated as an adsorbent. The Fe3O4-MNPs were synthesized using the co-precipitation method, and the surface of Fe3O4-MNPs was functionalized with PANI via the in situ chemical polymerization method. Key factors affecting the removal efficiency of heavy metal ions (HMIs), such as pH, sample volume, Fe3O4@PANI-NC amount, concentration of HMIs, eluent composition, type, and volume, were optimized. The optimum pH value was found to be 8.0, the optimal sample volume was 40.0 mL, and the analyte concentrations of 30 μg L−1 for Pb(II) and Cu(II), and 15 μg L−1 for Cd(II) and Co(II) were studied, respectively. The optimal eluent composition was 0.5 mL of 2.0 M HCl containing 0.2% (w/v) thiourea, and the optimal amount of Fe3O4@PANI-NC was determined to be 25.0 mg. The newly developed Fe3O4@PANI-NC magnetic solid phase extraction (MSPE) method exhibited highly sensitive detection limits for Pb(II), Cd(II), Cu(II), and Co(II) ions observed at 1.172, 0.147, 1.113, and 0.855 µg L−1, respectively. The Fe3O4@PANI-NC/MSPE method was validated using certified reference materials (CRM) and various real water samples, with the recoveries greater than 95% and relative standard deviation (%RSD) less than 3%. All these results indicated that the methodology displayed remarkable accuracy and a rapid approach for simultaneous determination of Pb(II), Cd(II), Cu(II), and Co(II) ions.