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- Title
Smectite Clay as an Adsorbent of Ammonia in the Rhamdia quelen Farming Under the Influence of Different Water Temperatures.
- Authors
Zadinelo, Izabel; Alves, Helton; Moesch, Augusto; Santos, Tais; Bernardi, Fernanda; Bombardelli, Robie; dos Santos, Lilian
- Abstract
The aim of this study was to evaluate the efficiency of the use of smectite clay as an adsorbent of ammonia in Rhamdia quelen farming under the influence of different water temperatures. Eighty individuals of silver catfishes were distributed in four experimental blocks: without the use of smectite clay in water at temperature of 30 °C (A); using smectite clay at temperature of 30 °C (B); without the use of smectite clay at temperature of 23 °C (C); and with the use of smectite clay at temperature of 23 °C (D). The following parameters of water quality were evaluated: temperature, dissolved oxygen, ammonia and nitrite, alkalinity, hardness, and pH. At end of the experiment, the fish were individually evaluated for total and standard lengths, total weights, and liver weight. Differences between the means of treatments for dissolved oxygen, total hardness, total alkalinity, and pH were not checked. Smectite clay did not constantly decrease ammonia concentrations, even when, for a period, the formation of organo-mineral compounds occurred, reducing the availability of ammonia for nitrification in optimum temperature for bacteria. No effects of treatments were observed on body weight, total and standard length, and hepatosomatic index. Dosages of added smectite clay were not sufficient to adsorb all the ammonia present in fish farming.
- Subjects
SMECTITE; AMMONIA; ADSORPTION (Chemistry); WATER temperature; AQUACULTURE; BENTONITE
- Publication
Water, Air & Soil Pollution, 2016, Vol 227, Issue 8, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-016-2972-2