Removal of cobalt from aqueous solution using xanthate functionalized dendrimer

Abstract

Removal of cobalt from aqueous solution by indigenously synthesized xanthate functionalized dendrimer (XFD) was investigated. Effect of pH and interference due to complexing agents/other cations on removal of cobalt by precipitation method was studied. Loading capacity of XFD as a function of cobalt concentration was estimated; about 0.355 g of cobalt could be loaded per gram of XFD at pH 4.5. It was observed that quantitative precipitation is effective at pH > 3 and the suspended particles are not settling down when the pH of feed solution is more than 6. The suspended particles settle down by the addition of coagulating agent (aluminum sulfate). The presence of Sr 2+ or Mg 2+ cations enhances precipitation process whereas monovalent Na + ion has no significant effect on cobalt removal by XFD ligand. Toxicity characteristics leaching procedure and semi-dynamic leaching test results show that Co-XFD complex is a characteristic leaching toxic and needs further treatment before dumping into the sanitary landfills.

An insight into the sequestration of tetra and hexavalent actinides by tri ethoxysilyl-amino-propyl-3-oxa-glutaramic acid (SAPOGA) functionalized titania

“…5 81 kJ mol À1 and 9.64 kJ mol À1 for U and Th, respectively. 14 (ii) DGA functionalized multiwalled carbon nanotubes were used for tetravalent Pu 4+ and hexavalent PuO 2 2+ actinide sorption, and the sorption energy estimated using the D-R isotherm was found to be 18.9 kJ mol À1 and 17.0 kJ mol À1 , respectively. 15 (iii) Diglycolamide calix [4]arene based resins have also been employed for Th 4+ sorption where the D-R analysis revealed the sorption energy to be 17.9 kJ mol À1 .…”

Modification of regenerated cellulose membrane based on thiol dendrimer

“…For example, Co(II) was selectively removed from aqueous solutions by using a synthesised xanthate functionalised dendrimer in solution (Ilaiyaraja, Singha, Ponraju, & Venkatraman, 2014). Moreover, the use of dendrimers in drug delivery and fuel cells has also been investigated (Zinselmeyer, Mackay, Andreas, & Uchegbu, 2002;Taylor & Moore, 1998).…”

Co(II) Sensing Molecular Assembly of Tetracyanoquinodimethane and Hydroxyquinoline Based on Charge-Transfer Interactions

“…It is also a significant environmental pollutant. [2][3][4] It is therefore very attractive to develop Co(II)-sensing reagents for potential applications in humans and the environment. Recently, many chemosensors have been reported for the determination of cobalt.…”