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Radiochim. Acta 94, 553–557 (2006) / DOI 10.1524/ract.2006.94.9.553 © by Oldenbourg Wissenschaftsverlag, München Investigation of complexation of thorium by humic acid using chemically immobilized humic acid on silica gel By Gy. Szabó1,∗, J. Guczi1, P. Reiller2, H. Geckeis3 and R. A. Bulman4 1 “Frédéric Joliot-Curie” National Research Institute for Radiobiology and Radiohygiene, PO Box 101, 1775 Budapest, Hungary 2 Commissariat á l’Énergie Atomique, CE Saclay, Nuclear Energy Division/DPC/SERC, Laboratoire de Spéciation des Radionucléides et des Molécules

into the structural basis of the pHdependent dimer-tetramer transition. Journal of Structural Biology, 158, 1–9. DOI: 10.1016/j.jsb.2006.08.014. [6] Eish, M. Y. Z. A., & Wells, M. J. M. (2006). Assessing the trihalomethane formation potential of aquatic fulvic and humic acids fractionated using thin-layer chromatography. Journal of Chromatography A, 1116, 272–276. DOI: 10.1016/j.chroma.2006.03.064. [7] Elgavish, S., & Shaanan, B. (1997). Lectin-carbohydrate interactions

DOI 10.1515/ract-2014-2163 | Radiochim. Acta 2014; 102(7): 629–643 Trevor Zimmerman, Mavrik Zavarin, and Brian A. Powell* Influence of humic acid on plutonium sorption to gibbsite: Determination of Pu-humic acid complexation constants and ternary sorption studies Abstract: In this work stability constants describing Pu(IV), Th(IV), and Np(V) binding to Leonardite humic acid (HA) were determined using a discrete pK 𝑎 model. A hybrid ultra-filtration/equilibrium dialysis, ligand ex- change technique was used to generate the partitioning data

-base, complexation and adsorption behavior by various theoretical models [3], their colloidal nature [4, 5] and their environmental importance [6] were also investigated. Based upon their solubility behavior, the HS can be divided into two main classes: the lower molecular mass fulvic acids (FA: 500–2000 Da) and the higher molecular mass humic acids (HA: 2×10 3 –10 6 Da) [7]. At a constant concentration of the inert salt, FA is soluble at all pH conditions, while HA is soluble only in alkaline media. Their solubility and reactivity are mainly due to the covalently bound

hydrolysis and methylation of EUROSOIL humic acid samples – A key to their source. In Geoderma , vol. 150 , no. 1‒2, pp. 10‒22. DEBSKA, B. ‒ SOMBATHOVA, N. ‒ BANACH-SZOTT, M. 2009. Properties of humic acids of soil under different management regimes. In Polish Journal of Soil Science, vol. 42 , pp. 131‒138. ENEV, V. – POSPÍŠILOVÁ, L. – KLUČÁKOVÁ, M. – LIPTAJ, T. – DOSKOČIL, L. 2014. Spectral characterization of selected humic substances. In Soil and Water Research , vol. 9 , pp. 9‒17. GONZÁLES-PÉREZ, M. – TORRADO, V

Radiochim. Acta 94, 369–373 (2006) / DOI 10.1524/ract.2006.94.6.369 © by Oldenbourg Wissenschaftsverlag, München Effect of humic acid on cesium sorption on silica colloids By S. Kumar1, B. S. Tomar1,∗, S. Ramanathan2 and V. K. Manchanda1 1 Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai – 400 085, India 2 Material Science Division, Bhabha Atomic Research Centre, Mumbai – 400 085, India (Received September 5, 2005; accepted in final form March 29, 2006) 137Cs / Silica colloids / Humic acid / Zeta-potential / Sorption / Linear additive model Summary

Radiochim. Acta 98, 467–477 (2010) / DOI 10.1524/ract.2010.1746 © by Oldenbourg Wissenschaftsverlag, München Study of the role of sulfur functionalities in humic acids for uranium(VI) complexation By S. Sachs1,∗, T. Reich2 and G. Bernhard1 1 Forschungszentrum Dresden-Rossendorf, Institute of Radiochemistry, P.O. Box 510 119, 01314 Dresden, Germany 2 Johannes Gutenberg-Universität Mainz, Institute of Nuclear Chemistry, Fritz-Straßmann-Weg 2, 55128 Mainz, Germany (Received January 16, 2010; accepted in revised form May 3, 2010) Humic acid / Humic acid model

carbon chain aldehydes could activate PMS or persulfate for chemical oxidation applications in the field scale [ 14 ]. These organic compounds exist broadly in the natural water or soil. They are environmental friendly and derived from natural resources. In this research, the effect of humic acid which is a natural organic matter, on the methylene blue degradation using PMS was investigated for the first time. This paper addresses an in-situ oxidative wastewater remediation method to degrade methylene blue using PMS in the absence of any activator and in the addition

References 1. Zhan, Y., Lin, J., Qiu, Y., Gao, N. & Zhu, Z. (2011). Adsorption of humic acid from aqueous solution on bilayer hexadecyltrimethyl ammonium bromide-modified zeolite. Front.Environ. Sci. Engin. Chin. 5, 65-75. DOI: 10.1007/s11783-010- 0277-z. 2. Lesley, J., Flora, J.R.V., Park, Y., Badawy, M., Hazem, S. & Yoon, Y. (2012). Removal of natural organic matter from potential drinking water sources by combined coagulation and adsorption using carbon nanomaterials. Sep. Purif. Technol. 95, 64-72. DOI: 10.1016/j.seppur.2012.04.033. 3. Huang, W.J. & Yeh

Radiochim. Acta 95, 501–506 (2007) / DOI 10.1524/ract.2007.95.9.501 © by Oldenbourg Wissenschaftsverlag, München Effect of humic acid on sorption of neptunium on hematite colloids By A. Jain1, N. Rawat1, S. Kumar1, B. S. Tomar1,∗, V. K. Manchanda1 and S. Ramanathan2 1 Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India 2 Material Science Division, Bhabha Atomic Research Centre, Mumbai 400085, India (Received August 23, 2006; accepted in revised form February 7, 2007) Neptunium / Humic acid / Hematite / Sorption / Speciation Summary