Copper complexing ligands and organic matter characterization in the northern Adriatic Sea

Plavšić, Marta; Gašparović, Blaženka; Strmečki, Slađana; Vojvodić, Vjeročka; Tepić, Nataša (2009) Copper complexing ligands and organic matter characterization in the northern Adriatic Sea. Estuarine, Coastal and Shelf Science, 85 (2). pp. 299-306. ISSN 0272-7714

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Abstract

The study on dissolved organic ligands capable to complex copper ions (LT), surface-active substances(SAS) and dissolved organic carbon (DOC) in the Northern Adriatic Sea station (ST 101) under the influence of Po River was conducted in period from 2006– 2008. The acidity of surface-active organic material (Acr) was followed as well. The results are compared to temperature and salinity distributions. On that way, the contribution of the different pools of ligands capable to complex Cu ions could be determined as well as the influence of aging and transformation of the organic matter. The LT values in the investigated period were in the range of 40– 300 nmol/l. The range of DOC values for surface andbottom samples were 0.84– 1.87 mg /l and 0.80– 1.30 mg/l, respectively. Total SAS concentrations in the bottom layer were 0.045– 0.098 mg/l in equiv. of Triton-X-100 while those in the surface layer were 0.050– 0.143 mg/l in equiv. of Triton-X-100. The majority of organic ligands responsible for Cu binding in surface water originate from new phytoplankton production promoted by river borne nutrients. Older, transformed organic matter, possessing higher relative acidity, is the main contributor to the pool of organic ligands that bind copper in the bottom samples. It was estimated that 9% of DOC in surface samples and 12% of DOC in the bottom samples are present as ligands capable to complex copper ions.

Item Type:	Article
Uncontrolled Keywords:	copper; organic compounds; coastal waters; seasonal distribution; northern Adriatic Sea
Subjects:	NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
Divisions:	Division for Marine and Enviromental Research
Projects:	Project title Project leader Project code Project type Priroda organske tvari, interakcije s mikrokonstituentima i površinama u okolišu- Irena Ciglenečki-Jušić 098-0982934-2717 MZOS
Depositing User:	Blaženka Gašparović
Date Deposited:	22 May 2018 08:09
URI:	http://fulir.irb.hr/id/eprint/4052
DOI:	10.1016/j.ecss.2009.08.014

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