Consulta: subjectFacets:"Calcium hardness"
Registros recuperados: 1
Data/hora: 06/06/2024 13:47:58

Calcium-free and low-calcium water production for aquaculture research - doi: 10.4025/actascianimsci.v33i1.10686
Provedor de dados: 2
Autores: Pinheiro, Paloma Damasceno; Universidade Federal do Ceará; Cavalcante, Davi de Holanda; Universidade Federal do Ceará; Moraes, Manuella Gazzineo de; Universidade Federal do Ceará; Sá, Marcelo Vinícius do Carmo e; Universidade Federal do Ceará.
The present work aimed to obtain a mathematical expression to calculate the amount of EDTA required to produce calcium-free and low-calcium water ([Ca2+] &lt; 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...
Palavras-chave: EDTA; Calcium hardness; Fish culture EDTA; Calcium hardness; Fish culture.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10686