Journal ArticleDOI
Sorption of anthropogenic radionuclides on natural and synthetic inorganic sorbents
TLDR
In this paper, the authors focused on the sorption of anthropogenic radionuclides originating from nuclear power plant operations (fission, activation, corrosion products and transuranium elements) on bentonites, zeolites, hydroxyapatites, magnetic sorbent, ferrocyanides, and silica sorbent.Abstract:
The history of sorption and ion-exchange processes starts with the use of natural materials which properties were discovered coincidentally and ends with the age of polymer and anorganic—or synthetic sorbents specifically made for a particular project. Its objectives are focused on sorption of anthropogenic radionuclides originating from nuclear power plant operations (fission, activation, corrosion products and transuranium elements) on bentonites, zeolites, hydroxyapatites, magnetic sorbent, ferrocyanides, and silica sorbent. Bentonites from Slovak deposits should be used as part of multi-barrier system in deep geological repository for spent nuclear fuel and high level radioactive waste. Zeolites are used as molecular sieves, catalysts, ion-exchangers, sorbents, water softeners, in wastewater treatment, in chemistry industry, buildings. Hydroxyapatite is a suitable sorbent for heavy metals and radionuclides due to its low water solubility, high stability under reducing and oxidizing conditions, high specific surface area and good buffering properties. The leaching wastes from the Sereď hydrometallurgical plant represent a large stock of inexpensive, ready-to-use magnetic sorbent for the decontamination of soil or sediments in their common suspensions, followed by the magnetic separation and sorbent recycling. Insoluble ferrocyanides of nickel are highly selective sorbents for heavy alkali metals ions, and therefore can be used to separate cesium from liquid radioactve waste. Silica sorbents modified with imidazole can be used for the separation of cobalt ions from aqueous solution.read more
Citations
More filters
Journal ArticleDOI
Structuring adsorbents and catalysts by processing of porous powders
TL;DR: In this article, the requirements and important properties of hierarchically porous structures are reviewed with a focus on applications in gas separation and catalysis, and their performance is compared with traditional binder-containing structured adsorbents.
Journal ArticleDOI
Using zeolitic adsorbents to cleanup special wastewater streams: A review
TL;DR: A review of the latest achievements on zeolite-based processes for treating these special wastewaters and discusses advantages and disadvantages of using zeolites for wastewater remediation processes is presented in this article.
Journal ArticleDOI
Adsorption of Cobalt(II) from Aqueous Solutions by Fe3O4/Bentonite Nanocomposite
TL;DR: In this paper, the adsorption of cobalt(II) on the bentonite, Fe3O4, and Fe 3O4/bentonite nanocomposite was studied by chemical co-precipitation method.
Journal ArticleDOI
Radioactive Barium Ion Trap Based on Metal–Organic Framework for Efficient and Irreversible Removal of Barium from Nuclear Wastewater
TL;DR: A new strategy to design barium adsorbent materials is proposed and a new perspective for removing radioactive barium and other radionuclides from nuclear wastewater for environment remediation is provided.
Journal ArticleDOI
Immobilization of Metal Hexacyanoferrate Ion-Exchangers for the Synthesis of Metal Ion Sorbents--A Mini-Review.
TL;DR: This mini-review reports some examples of hybrid materials synthesized for the immobilization of metal hexacyanoferrate, the different conditionings of these composite materials and, briefly, the parameters to take into account for their optimal design and facilitated use.
References
More filters
Journal ArticleDOI
Sequential extraction procedure for the speciation of particulate trace metals
TL;DR: In this paper, an analytical procedure involving sequential chemicai extractions was developed for the partitioning of particulate trace metals (Cd, Co, Cu, Ni, Pb, Zn, Fe, and Mn) into five fractions: exchangeable, bound to carbonates, binding to Fe-Mn oxides and bound to organic matter.