A chemically modified silica-gel as an ion exchange resin for pre-concentration of actinides and lanthanides

Applications of solid-state NMR spectroscopy in environmental science

“…Heavy metals are prevalent in everyday life, as they are (or have been) widely used in paints, textile, plastics, leather, batteries, pesticides, mining, electroplating, and other industry given their technological importance [61,62]. Moreover, there is a sharp increase in the industrial use of radionuclides, e.g., lanthanides and actinides, due to their nuclear, electrical, optical, and biochemical properties [63]. As a result, considerable quantities of heavy metals and radionuclides inevitably enter the environment through solid waste (e.g., mine tailings) and wastewater (e.g., industrial streams) produced, and are hazardous to the ecosystems and human health [62].…”

“…Boyer et al [78] recorded the 13 C SP MAS NMR spectra of organic matter in wetland substrates to investigate the roles of organic matter in the transport of strontium (Sr) in natural wetlands. Similarly, the 13 C and 29 Si MAS NMR spectra of a chemically modified silica-gel, which was used as an ion exchange resin for lanthanides and actinides, were collected to characterize the silica-gel and confirmed the covalent binding of ethylene-di-amine-tri-acetate to the silica-gel matrix after modification [63], and the 31 P MAS NMR spectrum of a Zr(IV)-organophosphonate coordination polymer used for selective adsorption of lanthanides and actinides was acquired for structural characterization [79].…”

Loading of Silver (I) Ion in L-Cysteine-Functionalized Silica Gel Material for Aquatic Purification

“…Functionalized silica gel matrices are silica gel structures that have been modified or functionalized with specific chemical groups or molecules. These modifications can impart new properties or enhance the existing properties of the silica gel matrix, expanding its range of applications to ion exchange matrices [1], chromatography matrices [2], affinity matrices [3], catalytic matrices [4], drug delivery matrices [5], and adsorbent matrices [6]. The choice of specific functionalization methods and chemical groups depends on the desired properties and applications of the silica gel matrix.…”