naa a22 4500 510750842 CHVBK 20180411083104.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11270-012-1381-4 doi (NATIONALLICENCE)springer-10.1007/s11270-012-1381-4 Effect of Extraction Variables on the Biodegradable Chelant-Assisted Removal of Toxic Metals from Artificially Contaminated European Reference Soils [Elektronische Daten] [Zinnat Begum, Ismail Rahman, Hikaru Sawai, Satoshi Mizutani, Teruya Maki, Hiroshi Hasegawa] Development of aminopolycarboxylate chelants (APCs) having enhanced biodegradability is gaining increasing focus to replace the EDTA and its homologs with those used widely for the ex situ treatment of contaminated soils and are potential eco-threats. The paper reports the chelant-assisted extraction of the toxic metals (Cd, Cu, Pb, and Zn) from the metal-spiked European reference soils (Eurosoil 1 and Eurosoil 4) using biodegradable APCs, namely EDDS, GLDA, and HIDS. The effects of chelant-to-metal molar ratio, solution pH, and metal/chelant stability constants were evaluated, and compared with that of EDTA. The selectivity aptitude of the biodegradable chelants towards the toxic metals was assumed from the speciation calculations, and a proportionate correlation was observed at neutral pH. Pre- and post-extractive solid phase distributions of the target metals were defined using the sequential extraction procedure and dissolution of metals from the theoretically immobilized fraction was witnessed. The effect of competing species (Al, Ca, Fe, Mg, and Mn) concentrations was proven to be minimized with an excess of chelant in solution. The highlight of the outcomes is the superior decontamination ability of GLDA, a biodegradable APC, at minimum chelant concentration in solution and applicability at a wide range of pH environments. Springer Science+Business Media Dordrecht, 2012 Soil remediation nationallicence Ex situ nationallicence Eurosoil nationallicence Aminopolycarboxylate chelants nationallicence Biodegradable nationallicence EDDS nationallicence GLDA nationallicence HIDS nationallicence Chelant-to-metal molar ratio nationallicence pH nationallicence Metal/chelant stability constant nationallicence Sequential extraction nationallicence Begum Zinnat Graduate School of Natural Science and Technology, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut Rahman Ismail Graduate School of Natural Science and Technology, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut Sawai Hikaru Graduate School of Natural Science and Technology, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut Mizutani Satoshi Graduate School of Engineering, Osaka City University, Sugimoto 3-3-138, 558-8585, Osaka, Sumiyoshi-Ku, Japan aut Maki Teruya Institute of Science and Engineering, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut Hasegawa Hiroshi Institute of Science and Engineering, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut Water, Air, & Soil Pollution Springer Netherlands 224/3(2013-03-01), 1-21 0049-6979 224:3<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1381-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1381-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Begum Zinnat Graduate School of Natural Science and Technology, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut NATIONALLICENCE 700 1- Rahman Ismail Graduate School of Natural Science and Technology, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut NATIONALLICENCE 700 1- Sawai Hikaru Graduate School of Natural Science and Technology, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut NATIONALLICENCE 700 1- Mizutani Satoshi Graduate School of Engineering, Osaka City University, Sugimoto 3-3-138, 558-8585, Osaka, Sumiyoshi-Ku, Japan aut NATIONALLICENCE 700 1- Maki Teruya Institute of Science and Engineering, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut NATIONALLICENCE 700 1- Hasegawa Hiroshi Institute of Science and Engineering, Kanazawa University, 920-1192, Kanazawa, Kakuma, Japan aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/3(2013-03-01), 1-21 0049-6979 224:3<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer