caa a22 4500 463231511 CHVBK 20180405153243.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10853-007-1974-2 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1974-2 Electrokinetic properties of barite nanoparticles suspensions in different electrolyte media [Elektronische Daten] [Jian Hang, Yu Zhang, Li Shi, Xin Feng] In this study, electrokinetic properties of barite nanoparticles have been investigated in water. A series of systematic zeta potential measurements have been performed to determine the isoelectric point (iep) and potential-determining ions (pdi), and the effect of mono-, di-, and trivalent anions sodium salts such as NaCl, NaNO3, NaCH3COO, Na2SO4, Na2CO3, and Na3PO4 on the zeta potential of barite nanoparticles. Barite nanoparticles yields an isoelectric point at pH 7.8. The zeta potential for the barite nanoparticles has ranged from +15.5mV at pH∼3 to −19.8mV at pH∼9.5 at 25±1°C in water. It is proved that the valency of the ions greatly influence on the electrokinetic behavior of the suspension. Monovalent anions were found to have a weak effect on the zeta potentials. The negative zeta potentials were observed in the presence of di- and trivalent anions. Charge reversal was observed for divalent anions at 1×10−2M and for trivalent anions at 1×10−1M. It was considered that monovalent anions are indifferent ions and di- and trivalent anions are potential-determining ions. A schematic adsorption model which accounts for the adsorption of mono- and multivalent anions in the electrical double layer of barite nanoparticles is proposed. Springer Science+Business Media, LLC, 2007 Hang Jian School of Environmental and Chemical Engineering, Shanghai University, 201800, Shanghai, P.R. China aut Zhang Yu School of Environmental and Chemical Engineering, Shanghai University, 201800, Shanghai, P.R. China aut Shi Li Nano Science and Technology Research Center, Shanghai University, 99 Shangda Road, 200444, Shanghai, P.R. China aut Feng Xin School of Material Science and Engineering, Shanghai University, 200072, Shanghai, P.R. China aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/23(2007-12-01), 9611-9616 0022-2461 42:23<9611 2007 42 10853 https://doi.org/10.1007/s10853-007-1974-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1974-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hang Jian School of Environmental and Chemical Engineering, Shanghai University, 201800, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Zhang Yu School of Environmental and Chemical Engineering, Shanghai University, 201800, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Shi Li Nano Science and Technology Research Center, Shanghai University, 99 Shangda Road, 200444, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Feng Xin School of Material Science and Engineering, Shanghai University, 200072, Shanghai, P.R. China aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/23(2007-12-01), 9611-9616 0022-2461 42:23<9611 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer