TY - JOUR ID - 106234 TI - Efficient adsorption of heavy metal ions onto diethylamine functionalized calix[4]arene based silica resin JO - Eurasian Chemical Communications JA - ECC LA - en SN - 2717-0535 AU - Junejo, Ranjhan AU - Memon, Shahabuddin AU - Palabiyik, Ismail Murat AD - National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro-76080 / Pakistan AD - Department of Analytical Chemistry, Faculty of Pharmacy, University of Ankara, Ankara, Turkey Y1 - 2020 PY - 2020 VL - 2 IS - 7 SP - 785 EP - 797 KW - Calix[4]arene based resin KW - Metal ions KW - thermodynamic and Kinetic Modelling DO - 10.33945/SAMI/ECC.2020.7.6 N2 - Water might be contaminated by different metal ions, resulting in different water-borne diseases in human and aquatic life. This research study aimed at synthesizing the diethylamine functionalized calix[4]arene based silica (DFCS) resin for the effective removal of heavy metals such as Cd2+, Pb2+, and Hg2+ from water. The DFCS resin was characterized using the FTIR spectroscopy and SEM techniques. The efficiency of the DFCS resin for the removal of metal ions was evaluated by performing equilibrium studies under the optimized conditions. Moreover, the experimental data were subjected to isotherm models; however, the Freundlich model was best-fit one as compared to the Langmuir model. The energy calculated from the D-R model was 10.3, 9.7 and 9.2 KJ/mol for Cd2+, Pb2+, and Hg2+,respectively, suggesting that the ion exchange process is involved. The thermodynamic values revealed that the reaction is spontaneous and exothermic, following the pseudo second-order kinetic model equation. UR - https://www.echemcom.com/article_106234.html L1 - https://www.echemcom.com/article_106234_bede4c72d08b0573f2276fc3a19719f7.pdf ER -