Adsorptive features of poli(acrylic acid-co-hydroxyapatite) composite for $$ {{\text{UO}}_{ 2}}^{{ 2 { + }}} $$ UO 2 2 +

Abstract

The copolymer of poli(acrylic acid-co-hydroxyapatite) (PAA-HAP) was prepared and characterized by means of FT-IR and SEM analysis. The adsorptive features of PAA-HAP for UO 2 2þ was studied as a function of pH, adsorbent dosage, initial metal ion concentration and temperature. The adsorption isotherm data fitted well to the Langmuir isotherm model. The adsorbed UO 2 2þ can be desorbed effectively by 0.1 M HNO 3 . The maximum adsorption capacities for UO 2 2þ of the dry PAA-HAP was 1.86 9 10 -4 mol/g. The high adsorption capacity and kinetics results indicate that PAA-HAP can be used as an alternative adsorbent to remove UO 2 2þ from aqueous solution.

Uranyl Ion Sorption Characteristics of Novel Polymer/Montmorillonite/Carboxymethyl Cellulose‐Composite Biosorbent‐Based AAm/AMPS Hydrogels and Semi‐IPNs

“…Highly swollen polymeric gels with the ability to absorb water in high amounts are again under investigation, because of their potential applications in water treatment processes, bioengineering, biomedicine, and other related areas . Studies have been reported on the use of hydrogels or hydrophilic characteristic cross‐linked polymers or copolymers as adsorbents for the removal of heavy metals, for the recovery of dyes, for removal of toxic or radioactive elements from various effluents, and for metal preconcentration for environmental sample analysis from aqueous solutions …”