Adsorptive removal of 4-hydroxybenzoic acid via cross-linked polymeric microbeads: analysis of isothermal, kinetic and thermodynamic parameters

Küçük M., Ozer E., Osman B.

CHEMICAL ENGINEERING COMMUNICATIONS, cilt.211, sa.1, ss.40-55, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 211 Sayı: 1
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1080/00986445.2023.2218271
  • Dergi Adı: CHEMICAL ENGINEERING COMMUNICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Aqualine, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.40-55
  • Anahtar Kelimeler: 4-hydroxybenzoic acid, adsorption, isotherm, kinetic, polymeric microbeads, removal, thermodynamic, SOLID-PHASE EXTRACTION, AQUEOUS-SOLUTION, PHENOLIC-COMPOUNDS, BENZOIC-ACID, COMPETITIVE ADSORPTION, HYDROXYBENZOIC ACIDS, ACTIVATED CARBON, SORPTION, PHTHALATE, WASTEWATERS
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

In this study, the performance of cross-linked microbeads prepared through suspension polymerization was investigated for removal of 4-hydroxybenzoic acid (4-HBA) from aqueous solution. Adsorption studies were conducted at different pHs (2.0-8.0), temperatures (282-308 K) and initial 4-HBA concentrations (1-500 mg/L). The maximum 4-HBA adsorption was 49.05 +/- 2.89 mg/g at pH 2.0 (282 K). The adsorption data obeyed to the Langmuir isotherm model. The modified Ritchie second-order and the pseudo second-order kinetic model fitted the adsorption data. The 4-HBA adsorption capacity did not significantly change after 10 consecutive usages. Gibbs free energy changes of the adsorption were calculated as -24.372, -28.431 and -29.093 kJ/mol for 282, 298 and 308 K, respectively. The microbeads were also used for the removal of 4-HBA from spiked river water samples. The removal efficiencies of 43.2% to 68.8% and RSDs of 0.49% to 4.78% demonstrated the usability of the microbeads in application.