Xanthate functionalized PAMAM dendrimer (XFPD) chelating ligand for treatment of radioactive liquid wastes. Issue 2 (June 2015)

• Record Type: Journal Article
• Authors: Ilaiyaraja, P.; Kumar Singha Deb, Ashish; Ponraju, D.; Venkatraman, B.
• Is Part Of: Journal of environmental chemical engineering. Volume 3:Issue 2(2015:Jun.)
• Page Start: 1047
• Page End: 1054
• Publication Date: 2015-06
• Subjects: Xanthate -- Dendrimer -- Precipitation -- Radioactive waste -- Heavy metals; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2015.03.013
• Languages: English
• ISSNs: 2213-2929

Abstract

Highlights: A new xanthate functionalized PAMAM dendrimer (XFPD) ligand is synthesized. XFDP effectively form complexes with various heavy metal ions at pH > 4. XFPD remove metal ions even at high ionic strength. Loading capacity of XFPD for Eu 3+ and Cu 2+ metal ions is 0.94 and 0.48 g g −1 . XFPD has potential application in total decontamination of radioactive waste. Abstract: Xanthate functionalized PAMAM dendrimer (XFPD) chelating ligand, first of its kind, has been synthesized from hydroxyl terminated poly(amido)amine dendrimer. Studies on performance of XFPD in removal of Cu 2+ and Eu 3+ metal ions were carried out from aqueous solution. Investigation on quantitative removal of Cu 2+ and Eu 3+ metal ions at various pH revealed that XFPD effectively precipitates the metal ions at pH > 4 with settling time of about 3 h. In case of Cu–XFPD complex at pH > 6, settling requires the addition of coagulating agent like aluminium sulphate. The loading capacity of XFPD for Cu 2+ and Eu 3+ metal ions was estimated to be 0.48 and 0.95 g g −1, respectively. The XFPD chelating ligand deployed for treatment of radioactive liquid waste (RLW) showed that percentage removal of radionuclides were in the following order; 95 Zr ≈ 154 Eu ≈ 60 Co (>99.8) > 144 Ce (98.8) > 125 Sb (83.3) > 106 Ru (79.4) > 55 Mn (54.3) > 137 Cs (24.0). It has been demonstrated that XFPD chelating ligand has potential application in effective removal of various radionuclides from aqueous waste.