The interactions of 54Mn with aminopolycarboxylic acids in aquatic systems

Erk, Marijana; Musani, Ljerka; Raspor, Biserka (1996) The interactions of 54Mn with aminopolycarboxylic acids in aquatic systems. Water research, 30 (7). pp. 1729-1735. ISSN 0043-1354

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Abstract

The interactions of 54Mn radionuclide with ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA) were studied in freshwater system (Butoniga impoundment), and in diluted seawater system (the Raša Bay) by high voltage paper electrophoresis. Depending on the EDTA or NTA concentrations it was possible to detect the distribution of cationic, anionic and immobile 54Mn species, and to calculate their electrophoretic mobilities. The apparent concentration stability constants of 54Mn-EDTA or 54Mn-NTA complexes were calculated from the respective titration curves. Logarithmic values of the apparent concentration stability constants for 54Mn-EDTA complex corrected for the influence of pH, Kc(aH), are in the range 6.20-7.38 in two different water types, while corrected for the effect of pH and Ca^2+, K_c(aL), in 5 percent seawater amount from 11.29 to 11.89. Logarithmic values of the apparent concentration stability constants for 54Mn-NTA complex corrected for the influence of pH, K_c(aH), are in the range 6.42-5.21 in two different water types, while corrected for the effect of pH and Ca^2+, K_c(aL), in 5percent seawater amount from 6.92 to 6.47.

Item Type:	Article
Uncontrolled Keywords:	complexation; 54Mn; ethylenediaminetetraacetic acid; nitrilotriacetic acid; high voltage paper electrophoresis
Subjects:	NATURAL SCIENCES > Chemistry NATURAL SCIENCES > Interdisciplinary Natural Sciences > Environmental Science
Divisions:	Division for Marine and Enviromental Research
Depositing User:	Marijana Erk
Date Deposited:	10 Jul 2015 11:13
URI:	http://fulir.irb.hr/id/eprint/2058
DOI:	10.1016/0043-1354(96)00061-9

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