naa a22 4500 510750419 CHVBK 20180411083102.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11270-013-1699-6 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1699-6 Comparative Sorption and Mobility of Cr(III) and Cr(VI) Species in a Range of Soils: Implications to Bioavailability [Elektronische Daten] [Girish Choppala, Nanthi Bolan, Dane Lamb, Anitha Kunhikrishnan] The sorption of chromium (Cr) species to soil has become the focus of research as it dictates the bioavailability and also the magnitude of toxicity of Cr. The sorption of two environmentally important Cr species [Cr(III) and Cr(VI)] was examined using batch sorption, and the data were fitted to Langmuir and Freundlich adsorption isotherms. The effects of soil properties such as pH, CEC, organic matter (OM), clay, water-extractable SO4 2- and PO4 3-, surface charge, and different iron (Fe) fractions of 12 different Australian representative soils on the sorption, and mobility of Cr(III) and Cr(VI) were examined. The amount of sorption as shown by K f was higher for Cr(III) than Cr(VI) in all tested soils. Further, the amount of Cr(III) sorbed increased with an increase in pH, CEC, clay, and OM of soils. Conversely, the chemical properties of soil such as positive charge and Fe (crystalline) had a noticeable influence on the sorption of Cr(VI). Desorption of Cr(VI) occurred rapidly and was greater than desorption of Cr(III) in soils. The mobility of Cr species as estimated by the retardation factor was higher for Cr(VI) than for Cr(III) in all tested soils. These results concurred with the results from leaching experiments which showed higher leaching of Cr(VI) than Cr(III) in both acidic and alkaline soils indicating the higher mobility of Cr(VI) in a wide range of soils. This study demonstrated that Cr(VI) is more mobile and will be bioavailable in soils regardless of soil properties and if not remediated may eventually pose a severe threat to biota. Springer Science+Business Media Dordrecht, 2013 Chromium species nationallicence Sorption nationallicence Soil properties nationallicence Mobility nationallicence Bioavailability nationallicence Choppala Girish Centre for Environmental Risk Assessment and Remediation, Building-X, University of South Australia, Mawson Lakes, 5095, Salisbury, SA, Australia aut Bolan Nanthi Centre for Environmental Risk Assessment and Remediation, Building-X, University of South Australia, Mawson Lakes, 5095, Salisbury, SA, Australia aut Lamb Dane Centre for Environmental Risk Assessment and Remediation, Building-X, University of South Australia, Mawson Lakes, 5095, Salisbury, SA, Australia aut Kunhikrishnan Anitha Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Gyeonggi-do, Suwon-si, Republic of Korea aut Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-12 0049-6979 224:12<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1699-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1699-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Choppala Girish Centre for Environmental Risk Assessment and Remediation, Building-X, University of South Australia, Mawson Lakes, 5095, Salisbury, SA, Australia aut NATIONALLICENCE 700 1- Bolan Nanthi Centre for Environmental Risk Assessment and Remediation, Building-X, University of South Australia, Mawson Lakes, 5095, Salisbury, SA, Australia aut NATIONALLICENCE 700 1- Lamb Dane Centre for Environmental Risk Assessment and Remediation, Building-X, University of South Australia, Mawson Lakes, 5095, Salisbury, SA, Australia aut NATIONALLICENCE 700 1- Kunhikrishnan Anitha Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Gyeonggi-do, Suwon-si, Republic of Korea aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-12 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