TY - JOUR
T1 - Palladium recovery from spent Pd plating solutions using Lewatit TP 214 resin
AU - Çetiner, Burcu Nilgün
AU - Yegül, Ece Uluser
AU - Zeytuncu, Bihter
AU - Aktaş, Serdar
N1 - Publisher Copyright:
© 2022 Desalination Publications. All rights reserved.
PY - 2022/3
Y1 - 2022/3
N2 - 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°C–60°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°C. On the other hand, a bit lower efficiency (95%) was attained after 180 min at pH 7.5 and 60°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).
AB - 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°C–60°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°C. On the other hand, a bit lower efficiency (95%) was attained after 180 min at pH 7.5 and 60°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).
KW - Ion-exchange resin
KW - Lewatit TP 214
KW - Palladium recovery
KW - Waste plating solution
UR - http://www.scopus.com/inward/record.url?scp=85129762690&partnerID=8YFLogxK
U2 - 10.5004/dwt.2022.28304
DO - 10.5004/dwt.2022.28304
M3 - Article
AN - SCOPUS:85129762690
SN - 1944-3994
VL - 253
SP - 211
EP - 222
JO - Desalination and Water Treatment
JF - Desalination and Water Treatment
ER -