Nanostructured potassium copper hexacyanoferrate-cellulose hydrogel for selective and rapid cesium adsorption

Abstract

Potassium copper hexacyanoferrate (KCuHCF) was synthesized and immobilized in a cellulose-based hydrogel made of carboxymethyl cellulose (CMC) and hydroxyethyl cellulose (HEC) for the adsorption of cesium ions in aqueous solutions.

Amino-functionalized magnetic chitosan beads to enhance immobilization of potassium copper hexacyanoferrate for selective Cs+ removal and facile recovery

“…3(a), the TGA prole of the HMC was similar to the curve for the MC, but there was a shi of the second step around 200 C in the degradation and another weight loss at 300-550 C. The shi is due to the presence of the KCuHCF, 47 and the weight loss corresponds to the decomposition of the cyano groups in the KCuHCF. 16 Furthermore, the mass fraction of the organic components in the HMC was approximately estimated to be 60.75%, and the rest is related to the inorganic elements from the Fe 3 O 4 and KCuHCF in the beads. The content of the Fe 3 O 4 and KCuHCF in the MC and HMC was analyzed by measuring the weight percentages of Fe, K and Cu using ICP-OES.…”

“…14,15 However, the MHCFs are a very ne powder that makes it difficult to recover the adsorbent particles from water by either centrifugation or ltration; thus, immobilizing the MHCFs in supporting materials is required for practical applications. For this approach, various polymers such as carboxymethyl cellulose, 16,17 polyvinyl alcohol, [18][19][20][21] alginate, 22 and chitosan, 23,24 have been studied as supporting materials. These polymeric materials have abundant functional groups on their surface which are highly effective for both incorporating the MHCF nanoparticles and further processing for commercial use.…”

Superabsorbent Hydrogel from Extracted Oil Palm Frond Waste Cellulose Using Microwave Irradioation for Cadmium Ion Removal from Aqueous Solution

“…As the concentration of cellulose increases in the hydrogel, more -COOH groups become available for the absorption of cadmium ions. It also increases the flexibility of the hydrogel to absorb more water and increase the swelling [33]. However, when the concentration of cellulose is higher than 2 %, the hydrogel becomes too rigid and tough, which causes the loss of hydrogel ability to absorb more water and decreases its swelling ability.…”

Batch and fixed-bed column studies for selective removal of cesium ions by compressible Prussian blue/polyurethane sponge

“…In order to solve these problems, PB/GO/PVA-alginate hydrogel beads, potassium copper hexacyanoferrate/cellulose hydrogel, PB immobilized magnetic hydrogel, PB/cellulose ber, PB/diatomite/carbon nanotubes spongiform, PB/chitosan/rayon bers, porous three-dimensional graphene foam/PB composite, PB/PVA composite nanober, granulated copper hexacyanoferrate porous networks have been successfully fabricated and applied to remove cesium from wastewater. [22][23][24][25][26][27][28][29][30][31][32] Modifying PB particles in bulk materials with porous structures can obviously improve their adsorption performances, which also need to be further developed according to the actual demand. In previous studies, batch adsorption experiments were usually carried out to characterize the adsorption properties of as prepared PB composites.…”