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oai:kanazawa-u.repo.nii.ac.jp:00043775 2024-06-20T06:08:11Z 934:935:937

Complexation behavior of SrII and geochemically-related elements (MgII, CaII, BaII, and YIII) with biodegradable aminopolycarboxylate chelators (GLDA and HIDS) 長谷川, 浩 Begun, Zinnat A. Rahman, Ismail M.M. 90253335 Hasegawa, Hiroshi Copyright © 2017 Elsevier B.V. The complexation of SrII and geochemically-related elements (MgII, CaII, BaII, and YIII) with biodegradable aminopolycarboxylate chelators (DL-2-(2-carboxymethyl)nitrilotriacetic acid (GLDA) and 3-hydroxy-2,2′-iminodisuccinic acid (HIDS)) was evaluated with the objective of using in the chemical-induced washing remediation of radioactive solid waste. The stability constants (log10KML) for metal-chelator (ML) complexes between M (MgII, CaII, SrII, BaII, or YIII) and L (GLDA or HIDS) in the aqueous matrix was derived from experimental potentiometric data (M:L = 1:1; ionic strength, I = 0.10 mol·dm− 3; T = 25 ± 0.1 °C). The formation of ML2 − species was dominant in the systems with MgII, CaII, SrII, or BaII, while M(OH)L2 − or M(OH)2L3 − was the major species with YIII. The stability of YIII-L complexes was higher than that of MgII, CaII, SrII, or BaII, while the order for complexation strength of GLDA and HIDS was not similar with divalent ions: M-GLDA (log10KMg-L < log10KCa-L > log10KSr-L > log10KBa-L), M-HIDS (log10KMg-L > log10KCa-L > log10KSr-L > log10KBa-L). The conditional stability constants for the ML systems was also derived in terms of pH (2 to 12), and compared with that of EDTA and EDDS. The data trend indicated that the overall stability of the complexes of MgII, CaII, SrII, BaII, or YIII with GLDA or HIDS was better than the biodegradable chelator EDDS, which was frequently recommended as the alternative to EDTA. © 2017 Elsevier B.V. Embargo Period 12 months 金沢大学理工研究域物質化学系 Elsevier B.V. 2017-09 2018-02-15 eng journal article AM https://doi.org/10.24517/00050117 http://hdl.handle.net/2297/00050117 https://kanazawa-u.repo.nii.ac.jp/records/43775 10.24517/00050117 10.1016/j.molliq.2017.07.126 http://www.elsevier.com/locate/issn/01677322 http://www.elsevier.com/locate/issn/01677322 AA10636062 0167-7322 Journal of Molecular Liquids 242 1123 1130 https://kanazawa-u.repo.nii.ac.jp/record/43775/files/SC-PR-HASEGAWA-H-1123.pdf application/pdf 599.3 kB 2018-09-02