naa a22 4500 510750362 CHVBK 20180411083102.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11270-013-1708-9 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1708-9 Electroremediation of Lead-Contaminated Kaolinite using Cation Selective Membrane and Different Electrolyte Solutions [Elektronische Daten] [Ravi Naidu, B. Sreedaran, Euan Smith] Electrokinetic extraction, which is an emerging technology, can be used for in situ removal of contaminants by the application of a direct current (DC) electric field across the contaminated subsurface soil. In this study, a kaolinite spiked with Pb (720mgkg−1) was used to investigate the removal of Pb through electrokinetic extraction in the presence or absence of a cation selective membrane (CSM). The contaminated kaolinite was subjected to a constant DC voltage (2Vcm−1) for 4days. A low DC voltage applied in absence of CSM developed a high pH interface within the electrokinetic cell. The mobility of Pb thus decreased due to the remarkable rise in the pH values. The inclusion of a CSM improved the removal efficiency but could not achieve the critical surface pH (<pH3.5). The removal efficiency increased in the presence of Ca(NO3)2, such that 95% of the spiked Pb was extracted from kaolinite, with 88% of the Pb being recovered from the cathode chambers. In contrast, only 24% of the spiked Pb was removed in the presence of ethylenediaminetetraacetic acid (EDTA). Moreover, Pb was detected in the anode chamber solution and 60% of the spiked Pb accumulated at the anode. In the presence of both EDTA and Ca(NO3)2, Pb migrated and accumulated at the anode, thus indicating that Ca has a negligible effect in the presence of EDTA. Springer Science+Business Media Dordrecht, 2013 Electrokinetic extraction nationallicence Electroremediation nationallicence Cation selective membrane nationallicence Kaolinite nationallicence Lead nationallicence Naidu Ravi Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Building X, University Boulevard, 5095, Mawson Lakes, SA, Australia aut Sreedaran B. 16 Parkview Crescent, 2619, Jerrabomberra, NSW, Australia aut Smith Euan Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Building X, University Boulevard, 5095, Mawson Lakes, SA, Australia aut Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-9 0049-6979 224:12<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1708-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1708-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Naidu Ravi Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Building X, University Boulevard, 5095, Mawson Lakes, SA, Australia aut NATIONALLICENCE 700 1- Sreedaran B. 16 Parkview Crescent, 2619, Jerrabomberra, NSW, Australia aut NATIONALLICENCE 700 1- Smith Euan Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Building X, University Boulevard, 5095, Mawson Lakes, SA, Australia aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-9 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