naa a22 4500 510752497 CHVBK 20180411083109.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11270-012-1429-5 doi (NATIONALLICENCE)springer-10.1007/s11270-012-1429-5 Remediation of Uranium-contaminated Groundwater by Sorption onto Hydroxyapatite Derived from Catfish Bones [Elektronische Daten] [S. Chattanathan, T. Clement, S. Kanel, M. Barnett, N. Chatakondi] Hydroxyapatite (HA) was prepared from catfish bones, identified as catfish HA (CFHA), using mechanical and chemical treatment methods. CFHA was characterized by x-ray diffraction (XRD) and scanning electron microscope (SEM) techniques to confirm the presence of HA. The ability of CFHA to remove uranium (U(VI)) from aqueous phase was investigated using both batch and column experiments. Adsorption experiments in batch experiments were carried by varying pH, preparation temperature, and particle size. The data shows that the maximum adsorption occurred between pH 5.5 and 7. The adsorption of U(VI) on CFHA was greater at 300°C than at 100°C. Batch data shows that the smallest particles, with maximum surface area, exhibited significant U(VI) removal efficiency. Column experiments were conducted using the smallest CFHA particles at different flow rates and breakthrough profiles were obtained. The scalability of the U(VI) removal process was tested by comparing the performances of columns packed with different CFHA. The results indicated that the reaction scales to the mass concentration of the reactants (CFHA and U(VI)). We also found that at pH 7, the CFHA packed in the column has the potential to remove about 3.9mg of U(VI) per gram. Our study shows that CFHA may be used in permeable reactive barriers for remediating U(VI)-contaminated groundwater plumes. Springer Science+Business Media Dordrecht, 2012 U(VI) nationallicence Hydroxyapatite nationallicence Permeable reactive barrier nationallicence Groundwater remediation nationallicence Chattanathan S. Department of Civil and Environmental Engineering, Auburn University, 36849, Auburn, AL, USA aut Clement T. Department of Civil and Environmental Engineering, Auburn University, 36849, Auburn, AL, USA aut Kanel S. Department of Civil and Environmental Engineering, Auburn University, 36849, Auburn, AL, USA aut Barnett M. Department of Civil and Environmental Engineering, Auburn University, 36849, Auburn, AL, USA aut Chatakondi N. USDA-ARS Catfish Genetics Research Unit, Mississippi State University, 39762, Mississippi State, MS, USA aut Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-9 0049-6979 224:2<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1429-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1429-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chattanathan S. Department of Civil and Environmental Engineering, Auburn University, 36849, Auburn, AL, USA aut NATIONALLICENCE 700 1- Clement T. Department of Civil and Environmental Engineering, Auburn University, 36849, Auburn, AL, USA aut NATIONALLICENCE 700 1- Kanel S. Department of Civil and Environmental Engineering, Auburn University, 36849, Auburn, AL, USA aut NATIONALLICENCE 700 1- Barnett M. Department of Civil and Environmental Engineering, Auburn University, 36849, Auburn, AL, USA aut NATIONALLICENCE 700 1- Chatakondi N. USDA-ARS Catfish Genetics Research Unit, Mississippi State University, 39762, Mississippi State, MS, USA aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-9 0049-6979 224:2<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer