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Titolo:
THE ROLE OF A GREEN-ALGA IN THE PRECIPITATION OF CALCITE AND THE COPRECIPITATION OF PHOSPHATE IN FRESH-WATER
Autore:
HARTLEY AM; HOUSE WA; CALLOW ME; LEADBEATER BSC;
Indirizzi:
UNIV BIRMINGHAM BIRMINGHAM B15 2TT W MIDLANDS ENGLAND INST FRESHWATER ECOL,RIVER LAB WAREHAM BH20 6BB DORSET ENGLAND
Titolo Testata:
Internationale Revue der gesamten Hydrobiologie
fascicolo: 3, volume: 80, anno: 1995,
pagine: 385 - 401
SICI:
0020-9309(1995)80:3<385:TROAGI>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
LAKE CONSTANCE; WATER; CARBONATE; INHIBITION; KINETICS; CRYSTALLIZATION; DISSOLUTION; ADSORPTION; GROWTH; STREAM;
Keywords:
CALCITE; PRECIPITATION; PHOSPHATE; INHIBITION; ALGAE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
37
Recensione:
Indirizzi per estratti:
Citazione:
A.M. Hartley et al., "THE ROLE OF A GREEN-ALGA IN THE PRECIPITATION OF CALCITE AND THE COPRECIPITATION OF PHOSPHATE IN FRESH-WATER", Internationale Revue der gesamten Hydrobiologie, 80(3), 1995, pp. 385-401

Abstract

The precipitation of calcite from a calcium bicarbonate solution, similar in ionic strength to natural hardwaters, was observed in a seriesof experiments utilizing an automated culture apparatus. Seeded growth experiments, using calcite seed crystals, were performed at a range of phosphate concentrations to observe inhibitory effects. These experiments demonstrated a linear relationship of increasing inhibition with increasing initial phosphate concentration. A further series of experiments was performed in which an actively photosynthesizing culture of a unicellular green alga (Chlorococcum sp.) was added to the culturevessel in order to initiate precipitation. Experiments to observe spontaneous precipitation, occurring in the absence of both seed and algaadditions, were carried out to compare with precipitation rates in the algal experiments. A control experiment was also performed to investigate whether precipitation occurrred in algal cultures maintained in darkness. The carbonate site mechanistic tic model, developed for calcite precipitation in abiotic conditions, was used to analyse the results of the algal experiments and found to be applicable.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 20:37:46