Effects of Prepared Gadolinium Oxide-Doped Chitosan/PVA Hydrogels on Congo Red Removal in Water

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BİNGÖL M. S.

WATER AIR AND SOIL POLLUTION, cilt.233, sa.10, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 233 Sayı: 10
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1007/s11270-022-05884-3
  • Dergi Adı: WATER AIR AND SOIL POLLUTION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, ABI/INFORM, Agricultural & Environmental Science Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Chimica, Compendex, EMBASE, Environment Index, Geobase, Greenfile, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Anahtar Kelimeler: Congo red, Chitosan, Adsorption, Gadolinium oxide, Hydrogel, AQUEOUS-SOLUTION, ADSORPTIVE REMOVAL, POLYVINYL-ALCOHOL, DYE, EQUILIBRIUM, NANOPARTICLES, DEGRADATION, SCAFFOLDS, MECHANISM, KINETICS
  • Atatürk Üniversitesi Adresli: Evet

Özet

Chitosan/polyvinyl alcohol/Gd2O3 (Ch-PVA-Gd) hydrogels were produced by freeze-thaw method for the adsorption of Congo red (CR) dye. The adsorbent was characterized using FT-IR, XRD, SEM-EDX, BET, and Zetasizer instruments. On the adsorption, the effects of the Gd2O3 doping ratio, pH, starting concentration, and adsorbent quantity were studied. The adsorption experiments removed more than 99% of Congo red. The Langmuir and Freundlich isotherm models were compared, and the Langmuir isotherm was found to be the most compatible. The maximum adsorption was calculated to be 312.5 mg/g using the Langmuir isotherm. The pseudo-second-order kinetic model was found to be the best fit for adsorption kinetics.