DISSOLVED ORGANIC-MATTER IN CHASCOMUS POND (ARGENTINA) - INFLUENCE OFCALCIUM-CARBONATE ON HUMIC-ACID CONCENTRATION

Citation
Vh. Conzonno et Af. Cirelli, DISSOLVED ORGANIC-MATTER IN CHASCOMUS POND (ARGENTINA) - INFLUENCE OFCALCIUM-CARBONATE ON HUMIC-ACID CONCENTRATION, Hydrobiologia, 297(1), 1995, pp. 55-59
Citations number
24
Categorie Soggetti
Marine & Freshwater Biology
Journal title
ISSN journal
00188158
Volume
297
Issue
1
Year of publication
1995
Pages
55 - 59
Database
ISI
SICI code
0018-8158(1995)297:1<55:DOICP(>2.0.ZU;2-C
Abstract
Water chemistry of the Chascomus Pond (Province of Buenos Aires, Argen tina) was studied during a year characterized by low precipitation. Su persaturation of calcium carbonate up to a calcite saturation index of about 20 in spring and summer was observed, together with a diminutio n of the concentration of dissolved organic matter, in particular humi c substances (HS). These results suggested an adsorption between organ ic matter and calcium carbonate which should influence the growth of c alcium carbonate crystals. A preferential removal of higher molecular weight HS was observed by gel permeation chromatography experiments.