Removal of thorium(IV) ions from aqueous solution by polyacrylamide-based monoliths: equilibrium, kinetic and thermodynamic studies

Abstract

In this study, a series of macroporous polyacrylamide-based monoliths bearing negatively charged interaction sites were synthesized as adsorbents for effective removal of Th 4+ from aqueous solutions. The effects of solution pH, contact time, monolith dosage, initial concentration, and temperature on adsorption process was studied. The Langmuir, Freundlich, and Dubinin-Raduskevich adsorption isotherms were applied to describe the adsorption data. The equilibrium data were best fitted with both Freundlich and Langmuir models. The experimental kinetic data were well described by the pseudo-second order kinetic. Thermodynamic studies revealed that the adsorption of Th 4+ onto the synthesized monolith was an endothermic and spontaneous process.

Synthesis of Pyridine Dicarboxylic Acid Functionalized and Crosslinked to Polyvinyl Alcohol/polyamide for Thorium Capturing From Aqueous Solution

“…As adsorbents, various types of polyacrylamide-constructed monoliths were manufactured with negatively charged interface sites to extract Th ions from waterbased solutions effectively. [28] Enhancement of Cu(II) and Cr(VI) removal was achieved by using an electrically spun carboxymethyl cellulose/PVA membrane. [29] Also, electrospinning and electrospray chitosan/polyvinylpyrrolidone/polyvinyl alcohol/ carbon nanotubes membrane was made for purifying water.…”

“…A multitude of experimental factors were demonstrated to impact the successful removal of contaminants significantly. As adsorbents, various types of polyacrylamide‐constructed monoliths were manufactured with negatively charged interface sites to extract Th ions from water‐based solutions effectively [28] . Enhancement of Cu(II) and Cr(VI) removal was achieved by using an electrically spun carboxymethyl cellulose/PVA membrane [29] .…”

Potentiometric Sensing of Thorium Ions Using PVC Matrix Electrodes Based on Crown Ethers

“…Thorium is a fissionable material which is more naturally abundant than uranium and thus can be introduced as an energy source to some types of nuclear reactors [2][3]. The largescale industrial and technological applications of thorium shared in its distribution over the earth's surface through mining, processing, usage, and waste disposal [4]. Thorium is ubiquitously distributed in soil, rocks, sand, plants, and water; thus it may end up in the human food chain causing acute health effects.…”