Eco-Friendly Biosorption of Uranium from Aqueous Solutions Using Sepiolite-Cavex CA37 Composite Biosorbent

ESEN ERDEN K., Donat R.

Clean - Soil, Air, Water, cilt.51, sa.6, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 51 Sayı: 6
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1002/clen.202200313
  • Dergi Adı: Clean - Soil, Air, Water
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Environment Index, Geobase, Greenfile, INSPEC, Pollution Abstracts, Veterinary Science Database
  • Anahtar Kelimeler: adsorption, biosorption, SCX-37, sepiolite, sorption isotherms
  • Kocaeli Üniversitesi Adresli: Evet

Özet

Cavex CA37 is a dental material used for positive tooth impressions. After the mold is taken, it hardens through a fast-chemical reaction with air, then becomes waste after usage. In this study, natural sepiolite and Cavex CA37 are mixed at certain ratios to obtain a composite SCX-37 biosorbent that is used for the biosorption of (Formula presented.) ions from a synthetic aqueous solution. Parameters affecting biosorption, such as solution pH, ambient temperature, contact time, and (Formula presented.) ion concentration, are investigated. The biosorption of (Formula presented.) ions on SCX-37 reaches equilibrium in 120 min with 97.56% efficiency at 30 °C and pH 4. The isotherms (Langmuir, Freundlich, and D-R) and thermodynamic values of the biosorption of (Formula presented.) ions on the SCX-37 biosorbent are calculated according to the obtained data. It is determined that there is a high correlation between experimental results and all three isotherm models. The adsorption capacity is found to be 41.39 mg g−1. The biosorption of (Formula presented.) ions onto the SCX37 biosorbent is a chemisorption process with an adsorption energy of 40.50 kJ mol−1.