Adsorption performance of heavy metal ions from aqueous solutions by a waste biomass based hydrogel: comparison of isotherm and kinetic models

Gürkan E. H., Ilyas B., Tibet Y.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY, cilt.103, sa.6, ss.1343-1360, 2023 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 103 Sayı: 6
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1080/03067319.2021.1873314
  • Dergi Adı: INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Chemical Abstracts Core, Chimica, Compendex, Environment Index, Food Science & Technology Abstracts, Pollution Abstracts, Veterinary Science Database
  • Sayfa Sayıları: ss.1343-1360
  • Anahtar Kelimeler: Adsorption, alginate, biochar, composite adsorbent, copper, rice husk, zinc
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

The rice husk biochar (RHB), Ca-alginate (CA), and biochar/ca-alginate composites (CA-RHB) was synthesised for the removal of aqueous Cu(II) and Zn(II) and characterised by BET, SEM, EDS, and FT-IR analysis. The adsorption experiments of Cu(II) and Zn(II) ions by RHB, CA, and CA-RHB were studied on effects of initial concentration, pH, and contact time. The purpose of characterisation the adsorption behaviours of Cu(II) and Zn(II) ions on RHB, CA, CA-RHB1, CA-RHB2, CA-RHB3, and CA-RHB4, the Langmuir, Freundlich, Temkin, Redlich-Peterson, Hill and Unilan isotherm models and the pseudo-?rst-order, the pseudo-second order, Intra-particle diffusion model, Elovich and Avrami kinetic models apply to the experimental adsorption data. The maximum Cu (II) adsorption capacity estimated with Langmuir isotherm modelling was 44.60 mg g(-1), for CA, 41.74 mg g(-1) for CA-RHB1, 42.62 mg g(-1) for CA-RHB2, 35.45 mg g(-1) for CA-RHB3, and 31.52 mg g(-1) for CA-RHB4, and 10.56 mg g(-1) for BMB. The maximum Zn (II) adsorption capacity estimated with Langmuir isotherm modelling was 43.32 mg g(-1), for RHB, 25.07 mg g(-1) for CA, 22.23 mg g(-1) for CA-RHB1, 23.68 mg g(-1) for CA-RHB2, 22.03 mg g(-1) for CA-RHB3, and 34.41 mg g(-1) for CA-RHB4,