Palladium recovery from spent Pd plating solutions using Lewatit TP 214 resin

ÇETİNER B. N., Yegul E. U., Zeytuncu Gökoğlu B., AKTAŞ S.

DESALINATION AND WATER TREATMENT, cilt.253, ss.211-222, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 253
  • Basım Tarihi: 2022
  • Doi Numarası: 10.5004/dwt.2022.28304
  • Dergi Adı: DESALINATION AND WATER TREATMENT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, CAB Abstracts, Environment Index, Geobase, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.211-222
  • Anahtar Kelimeler: Palladium recovery, Waste plating solution, Ion-exchange resin, Lewatit TP 214, ION-EXCHANGE-RESINS, CHLORIDE SOLUTIONS, FUNCTIONAL-GROUPS, ADSORPTION, COMPLEXES, REMOVAL, MEDIA
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

This study aims to explore the recovery of palladium (Pd(II)) ions using Lewatit TP 214 resins. Waste Pd(II) ions with ammonia complex procured from a precious metal plating were selected as the source solution. In the experimental studies, two stock solutions of 60 ppm Pd(II) with a pH value of 4.0 and 7.5 were prepared as initial solutions. The experiments were performed by altering four parameters: solution pH, time 15-180 min, temperature 25 degrees C-60 degrees C, and amount of resin 100-400 mg. It was proved that the recovery percentage increased with higher temperature and resin at lower pH values. The Pd(II) recovery percentage increased with a temperature rise, reaching 100% after 40 min at pH 4.0 and 60 degrees C. On the other hand, a bit lower efficiency (95%) was attained after 180 min at pH 7.5 and 60 degrees C. Using Lewatit TP 214, the computed activation energies for Pd(II) recovery are 17.73 and 15.62 kJ/mol at pH 4.0 and 7.5, respectively. Considering these activation energy values, a mixed mechanism dominated the recovery of Pd(II).