naa a22 4500 510750311 CHVBK 20180411083102.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11270-013-1700-4 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1700-4 Effect of Ionic Strength and Index Cation on the Sorption of Phenanthrene [Elektronische Daten] [Luchun Duan, Ravi Naidu] Sorption characteristics of phenanthrene were studied in batch equilibrium experiments with 32 Australian soils that varied widely in physicochemical properties. Sorption of phenanthrene varied widely among the soils and was generally nonlinear, with the nonlinearity index (n) of the Freundlich isotherm varying from 0.62 to 1.01. Simple regression analyses revealed that total organic carbon (TOC) accounts for about 68% of the variation in the partition coefficient (K′ f ) for sorption among the soils at an equilibrium concentration (C e ) of 0.05mg/L. The organic carbon normalized distribution coefficient (K OC ), varied considerably between soils with >70% of the variance of logK OC being accounted for by logTOC, clay and log dissolved organic carbon (DOC). These results show that the phenanthrene C e is influenced by both TOC as well as the DOC in soil suspensions. The effects of ionic strength (IS) and index cation were investigated using four contrasting soils. Results show that with an increase in IS from 0.03 to 0.15M sorption of phenanthrene generally increased in CaCl2 background solutions, whereas the effect was less significant and variable in NaCl background solutions. Sorption of phenanthrene was slightly higher at low IS (0.03M) with Na+ as index cation compared with that of Ca2+, whereas an opposite trend was observed at higher IS (0.15M). For two soils high in TOC, the flocculation of endogenous DOC in the presence of Ca2+ reduced the influence of background electrolyte and resulted in a more linear sorption isotherm as well as higher sorption capacity. This trend was more significant with Ca2+ relative to Na+. Springer Science+Business Media Dordrecht, 2013 Soil properties nationallicence Phenanthrene nationallicence Sorption nationallicence Organic carbon nationallicence Duan Luchun Centre for Environmental Risk Assessment and Remediation, Building X (Environmental Sciences Building), University of South Australia, 5095, Mawson Lakes, SA, Australia aut Naidu Ravi Centre for Environmental Risk Assessment and Remediation, Building X (Environmental Sciences Building), University of South Australia, 5095, Mawson Lakes, SA, Australia aut Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-17 0049-6979 224:12<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1700-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1700-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Duan Luchun Centre for Environmental Risk Assessment and Remediation, Building X (Environmental Sciences Building), University of South Australia, 5095, Mawson Lakes, SA, Australia aut NATIONALLICENCE 700 1- Naidu Ravi Centre for Environmental Risk Assessment and Remediation, Building X (Environmental Sciences Building), University of South Australia, 5095, Mawson Lakes, SA, Australia aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-17 0049-6979 224:12<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer