Methylene Blue Adsorption by Chemically Foamed Geopolymer Based on Fly Ash

Özkan H., Tuğrul N., Derun E.

WATER, AIR AND SOIL POLLUTION : AN INTERNATIONAL JOURNAL OF ENVIRONMENTAL POLLUTION, cilt.234, ss.1-11, 2023 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 234
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1007/s11270-023-06315-7
  • Dergi Adı: WATER, AIR AND SOIL POLLUTION : AN INTERNATIONAL JOURNAL OF ENVIRONMENTAL 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
  • Sayfa Sayıları: ss.1-11
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

The storage and disposal of fy ash, which is generated as an industrial waste of thermal power plants, is a challenging process, as is the case with all wastes. In this study, it is aimed to obtain a useful product for methylene blue adsorption by using fy ash in the production of foamed geopolymer. Geopolymers, which were obtained by doping Zn and Al metals, were cured in 2 diferent environments, at room conditions and at room conditions with pre-curing at 80 °C. NaOH and Na2SiO3 solutions were used for geopolymerization. X-ray fuorescence spectroscopy (XRF), Fourier transform infrared spectroscopy (FTIR), Brunauer, Emmet, and Teller surface area analysis (BET), and X-ray difraction (XRD) analysis were applied for the characterization of fy ash and geopolymers. It was observed that optimum geopolymer sample produced has 27.355 m2 /g surface area. Langmuir isotherm (R2=0.9962) was the most suitable adsorption isotherm in adsorption studies with the optimum geopolymer sample. The highest adsorption efciency was obtained 97.4% in 50 ppm solution. As a result, it was observed that the geopolymer surface area could be increased by using chemical foaming method and obtained geopolymer could be successfully used for methylene blue adsorption