Calcium-free and low-calcium water production for aquaculture research

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dc.creatorPaloma Damasceno Pinheiro
dc.creatorDavi de Holanda Cavalcante
dc.creatorManuella Gazzineo de Moraes
dc.creatorMarcelo Vinícius do Carmo e Sá
dc.date2011
dc.date.accessioned2026-07-07T03:59:18Z
dc.descriptionThe present work aimed to obtain a mathematical expression to calculate the amount of EDTA required to produce calcium-free and low-calcium water ([Ca2+] < 5 mg L-1). Initially, a pilot test was carried out to confirm the effectiveness of EDTA as a chelating agent of waterborne calcium and to evaluate its effect on water pH. Five application rates of Na- EDTA (25, 50, 75, 100 and 125 mg L-1) were tested. The concentration of calcium in water was determined initially (before the application of EDTA) and after one hour. Linear regression analysis was performed to find out the relationship between the desired calcium concentration in water and the required EDTA: initial calcium hardness ratio. The expression ŷ = -0.0911x + 3.3628 (R² = 0.933) was derived from the linear regression analysis carried out, in which x represents the desired calcium concentration in water and y the required EDTA: initial calcium hardness ratio.
dc.formatapplication/pdf
dc.identifier1806-2636
dc.identifierhttps://www.redalyc.org/articulo.oa?id=303126503007
dc.identifier.urihttp://hdl.handle.net/123456789/449682
dc.languageen
dc.publisherUniversidade Estadual de Maringá
dc.relationhttp://www.redalyc.org/revista.oa?id=3031
dc.rightsActa Scientiarum. Animal Sciences
dc.sourceActa Scientiarum. Animal Sciences (Brasil) Num.1 Vol.33
dc.subjectAgrociencias
dc.titleCalcium-free and low-calcium water production for aquaculture research
dc.typeartículo científico

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Acta Scientiarum. Animal Sciences - Universidade Estadual de Maringá