adsorption – Page 2 – TechConnect Briefs

Preparation of GO/PVA composite as an adsorbent for the removal of Cr(VI) from water

Singh D.K., Kumar V., Hasan S.H., Indian Institute of Technology (BHU), IN

Cr(VI) is a known toxic heavy metal and has been considered as a priority pollutant in water [1]. The effluent of various industries including electroplating, anodizing baths, leather tanning, steel industry and chromium based catalyst [...]

Adsorption of Cl adatom on Na-Decorated graphene

Yuan G., Song X., Li C., Wang J., Mimura H., Ocean University of China, CN

In this presentation, the effects of the Cl adatom on Na-decorated graphene are studied using first principles density functional theory. The adsorption energy, geometric structure, charge density difference, and density of states are calculated under [...]

Adsorption of Cd (II) Ions from Aqueous Solution Using Activated Carbon Prepared from Vitellaria paradoxa Shell

Adebayo G.B., Adekola F.A., Jimoh A.A., Alao F.O., Adegoke H.I., University of Ilorin, NG

Activated carbon prepared from vitellaria paradoxa shell using ortho-phosphoric acid as activating agent was used for the removal of Cd (II) ions from aqueous solution. The adsorbent sample was characterized by some physicochemical and spectroscopic [...]

Pelletized silica and amine composites for CO2 capture via adsorption

Knowles G.P., Vogt C., Chaffee A.L., Cooperative Research Center for Greenhouse Gas Technologies, AU

Solid amine sorbent powders are of broad interest to facilitate CO2 capture towards reducing atmospheric greenhouse gas. It is recognized, however, that pelletized rather powdered adsorbents are required for industrial adsorption separation processes. “Molecular basket” [...]

Synthesis of {111}-faceted Au Nanocrystals Mediated by Polyvinylpyrrolidone: Insights from Density-Functional Theory and Molecular Dynamics

Liu S.-H., Saidi W.A., Zhou Y., Fichthorn K.A., The Pennsylvania State University, US

We use dispersion-corrected density-functional theory (DFT) and classical molecular-dynamics (MD) to resolve the role of polyvinylpyrrolidone (PVP), a widely used structure-directing agent, in the shape-selective synthesis of {111}-faceted Au nanostructures. First by DFT, we consider [...]

Interaction of Surface Modified Silica Nanoparticles with Clay Minerals

Metin C.O., Nguyen Q.P., The University of Texas at Austin, US

The interaction of silica nanoparticles with montmorillonite clay was investigated by visual swelling tests, Fourier Transform Infrared (FTIR), and x-ray diffraction (XRD). The adsorption of silica nanoparticles onto montmorillonite was also studied with a UV-Vis [...]

Pelletized silica and polyethyleneimine composites for CO2 capture via adsorption

Knowles G.P., Chaffee A.L., Monash University, AU

Amine adsorbent powders are of broad interest to facilitate CO2 capture towards reducing atmospheric greenhouse gas. It is recognized, however, that industrial adsorption processes require pelletized rather than powdered adsorbents. Mesoporous silica and branched polyethyleneimine [...]

Interaction of Surface Modified Silica Nanoparticles with Clay Minerals

Metin C.O., Nguyen Q.P., The University of Texas at Austin, US

The interaction of silica nanoparticles with montmorillonite clay was investigated by visual swelling tests, Fourier Transform Infrared (FTIR), and x-ray diffraction (XRD). The adsorption of silica nanoparticles onto montmorillonite was also studied with a UV-Vis [...]

Pelletized silica and polyethyleneimine composites for CO2 capture via adsorption

Knowles G.P., Chaffee A.L., Monash University, AU

Amine adsorbent powders are of broad interest to facilitate CO2 capture towards reducing atmospheric greenhouse gas. It is recognized, however, that industrial adsorption processes require pelletized rather than powdered adsorbents. Mesoporous silica and branched polyethyleneimine [...]

Recovery of phosphate from surface waters using a calcium silicate composite material for potential application in environmental remediation

Cairns M.J., Krauss C., Johnston J.H., Victoria University of Wellington, NZ

In many locations, contamination of surface waters by phosphate due to agricultural run-off is becoming a major environmental concern. Currently, there are no effective means for its removal, due to the low phosphate concentration (< [...]