Removal of137Cs from an intermediate level liquid waste by using various ion-exchange media

1999 ◽  
Vol 242 (2) ◽  
pp. 341-348 ◽  
Author(s):  
P. K. Sinha ◽  
P. M. Satyasai ◽  
R. Shankar ◽  
R. Muthiah ◽  
S. Bera ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Liquid Waste ◽  
Intermediate Level

Corrosion of Steel Drums Containing Cemented Ion-Exchange Resins as Intermediate Level Nuclear Waste

2012 ◽  
Vol 1475 ◽  
Author(s):  
Gustavo S. Duffó ◽  
Silvia B. Farina ◽  
Fátima M. Schulz
Keyword(s):  
Ion Exchange ◽  
Radioactive Waste ◽  
Mechanical Stability ◽  
Liquid Waste ◽  
Intermediate Level ◽  
Radioactive Waste Disposal ◽  
Ion Exchange Resins ◽  
Internal Corrosion ◽  
Steel Drums ◽  
Exchange Resins

ABSTRACTIon-exchange resins are used for purification of radioactive liquid waste from nuclear reactors. After exhaustion, resins become intermediate level radioactive waste to be managed. They have to be immobilized before being stored to improve the leach resistance of the waste matrix and to maintain mechanical stability for safety requirements. The immobilized resins are thus contained in steel drums that can undergo internal corrosion depending on the presence of certain contaminants. This work shows an study of the corrosion susceptibility of steel drums in contact with cemented ion-exchange resins with different types and contents of aggressive species. Results show that the corrosion depth of the steel drums after a period of 300 years (foreseen life-span of the radioactive waste disposal facility), in the most unfavorable case (high chloride contamination), will be considerably lower than the thickness of the wall of the drums.

Porous Crystalline Silica (Gubka) as a Inorganic Support Matrix for Novel Sorbents

2002 ◽  
Vol 713 ◽  
Author(s):  
T. J. Tranter ◽  
A. S. Aloy ◽  
N. V. Sapozhnikova ◽  
D. A. Knecht ◽  
T. A. Todd
Keyword(s):  
Ion Exchange ◽  
Glass Matrix ◽  
Large Scale ◽  
Liquid Waste ◽  
Crystalline Silica ◽  
Khlopin Radium Institute ◽  
Radium Institute ◽  
Inorganic Ion ◽  
Radiation Fields ◽  
Environmental Laboratory

ABSTRACTInorganic ion exchange media typically exist as fine powders, making large-scale use impractical, unless the media can be affixed to an appropriate matrix. Likewise, organic chelating agents are typically dissolved in a solvent and absorbed into porous matrices for use in extraction chromatography. The most common matrices utilized in both cases are organic materials, that are not compatible with high radiation fields or acceptable as final waste forms. Recent investigations have shown that ion exchange sorbents can be effectively loaded within a porous crystalline silica (Gubka) matrix. This approach allows for target radionuclides to be adsorbed into a porous micro-crystalline glass matrix which encapsulates the contaminant and becomes the final waste form. Subsequent to adsorption of the radionuclides, the Gubka matrix can be compressed in a hot uniaxial press, resulting in an even greater volume reduction. The porous glass matrix is produced in Russia using fly ash residue from coal combustion power generating plants. It consists of consolidated arrays of hollow glass cenospheres and is termed Gubka which is the Russian word for sponge. This paper describes results of a collaborative research program between the Khlopin Radium Institute, St.Petersburg, Russia, the Institute of Chemistry and Chemical Technologies, Krasnoyarsk, Russia, the Mining and Chemical Combine, Zheleznogorsk, Russia, and the Idaho National Engineering and Environmental Laboratory. Ammonium molybdophosphate (AMP) for the removal of cesium from acidic liquid waste has been successfully incorporated into Gubka matrices. Test results for cesium removal, using AMP-Gubka, are discussed.

scholarly journals Estimation and Removal of Chromium Ions from Tannery Wastes Using Zeolite-3A

1998 ◽  
Vol 16 (3) ◽  
pp. 153-161 ◽  
Author(s):  
Hajira Tahir ◽  
M. Saleem ◽  
M. Afzal ◽  
H. Ahmad ◽  
S.T. Hussain ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Low Cost ◽  
Liquid Waste ◽  
Atomic Absorption Spectrophotometry ◽  
Factors Affecting ◽  
Chromium Ions ◽  
Ion Removal ◽  
Sorbent Materials ◽  
Isotherm Equations

The concentration of potentially toxic chromium metal ions in sediments and liquid waste samples from selected tanneries was measured by atomic absorption spectrophotometry after digestion with nitric acid. The data obtained revealed the presence of elevated levels of chromium metal ions in waste samples relative to the NEQS (National Environmental Quality Standards) require-ments. A new process entitled IERECHROM (Ion Exchange REmoval of CHROMium) has been developed for the removal and separation of chromium ions from sediments using zeolite-3A. The factors affecting chromium ion removal include exchanger concentration, pH, shaking time and temperature. The applicability of the Freundlich. Dubinin–Radushkevich and virial isotherm equations to the system has been examined. The thermodynamic parameters °LH0, °LG0 and °LS0 were calculated using the virial isotherm expression. The results suggest that natural aluminosilicates such as zeolite-3A can be utilised as low-cost ion-exchange and sorbent materials because of their selectivities for the removal of chromium ions and various other heavy metals.

Radiocesium removal from high level liquid waste and immobilisation in sodium silicotitanate for geological disposal

2001 ◽  
Vol 89 (3) ◽  
Author(s):  
T. Tomasberger ◽  
A.C. Veltkamp ◽  
A. S. Booij ◽  
U. W. Scherer
Keyword(s):  
Ion Exchange ◽  
Fission Product ◽  
Liquid Waste ◽  
High Level Liquid Waste ◽  
Geological Disposal ◽  
Inorganic Ion ◽  
Exchange Material ◽  
Leaching Behaviour ◽  
Concentration Factors ◽  
High Level

The isolation of the fission product cesium from high-level alkaline liquid waste is studied with inorganic ion-exchange materials. High separation and concentration factors can be obtained using sodium silicotitanate (CST). The leaching behaviour of cesium from CST was studied in clay porewater and Quinary brine at 90 °C. It is shown that cesium leaching in Quinary brine can be drastically reduced by thermal treatment of cesium loaded CST above 1000 °C. To this end, neutralisation of the ion exchange material before heating is required in order to reduce cesium volatility. It is concluded that CST is a good candidate material for geological disposal of the fission product cesium.

scholarly journals PEMISAHAN ASAM AMINO DARI LIMBAH CAIR PABRIK KELAPA SAWIT DENGAN KROMATOGRAFI PENUKAR ION

2018 ◽  
Vol 6 (2) ◽  
pp. 69
Author(s):  
Indah Rahmi Sari ◽  
Ade Ayu Oksari ◽  
Irma Kresnawaty
Keyword(s):  
Amino Acid ◽  
Ion Exchange ◽  
Liquid Waste ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Enzyme Hydrolysis ◽  
Protease Enzyme ◽  
Absorbance Reading ◽  
Amino Acid Levels ◽  
Hydrolysis Of

Separation of Amino acid from Liquid waste of Oil palm Factory with Ion Exchange Chromatography Research on Separation of Amino Acid Liquid Waste mills with Ion Exchange Chromatography was carried out from October to November 2015. The results of  hydrolysis of 6 N HCl results showed  that the highest absorbance reading was obtained at a concentration of eluent of 0,2 and 0,6 M NaCl, while the results of the protease enzyme hydrolysis the highest absorbance reading at NaCl eluent 0,2 and 1 M. There was no significant difference in the results of separation by ion exchange chromatography, showed that the concentration of NaCl eluent is not very influential, so for subsequent analysis used only one concentration of the eluent. Results of linear regression obtained was equal to 0,9946, these results indicate that the series standard amino acid lysine has a value that is linear as it approaches 1. The amino acid levels obtained on the sample results LCPKS hydrolysis with 6 N HCl which was about 0 to 8.82 ppm and samples of the protease enzyme hydrolysis of about 0 to 4.31 ppm. Amino acid levels obtained were still far from the expected.Keywords: Amino Acid, Oil Palm, Liquid Waste, Ion Exchange Chromatography ABSTRAKPenelitian mengenai Pemisahan Asam Amino dari Limbah Cair Pabrik Kelapa Sawit dengan Kromatografi Penukar Ion telah dilaksanakan dari bulan Oktober sampai November 2015. Hasil hidrolisis HCl 6 N menunjukkan bahwa pembacaan absorbansi tertinggi diperoleh pada konsentrasi eluen NaCl 0,2 dan 0,6 M, sedangkan hasil hidrolisis enzim protease pembacaan absorbansi tertinggi pada eluen NaCl 0,2 dan 1 M. Tidak ada perbedaan yang signifikan pada hasil pemisahan dengan kromatografi penukar ion ini, menunjukkan bahwa konsentrasi eluen NaCl tidak terlalu berpengaruh, sehingga untuk analisis selanjutnya digunakan hanya satu konsentrasi eluen. Hasil regresi linear yang diperoleh yaitu sebesar 0,9946, hasil tersebut menunjukkan bahwa deret standar asam amino lisin mempunyai nilai yang linear karena mendekati 1. Kadar asam amino yang diperoleh pada sampel hasil hidrolisis LCPKS dengan HCl 6N yaitu sekitar 0 – 8,82 ppm dan sampel hasil hidrolisis enzim protease sekitar 0 – 4,31 ppm. Kadar asam amino yang diperoleh masih jauh dari yang diharapkan.Kata Kunci: Asam Amino, Minyak Kelapa Sawit, Limbah Cair, Kromatografi Penukar Ion

Sign in / Sign up

Export Citation Format

Share Document