CD Skripsi
Toksisitas Akut Limbah Detergen Dan Uji Sublethal Terhadap Benih Ikan Gurami (Osphronemus Goramy)
Abstract
Laundry detergent waste is toxic and is able to endanger aquatic life and its
environment. The aim of this research is to establish the impact of detergent waste
on the growth and mortality of gourami fingerlings (Osphronemus goramy), as well
as to discover the threshold value of laundry detergent waste that gourami
fingerlings (Osphronemus goramy) can tolerate. Using a totally randomized design
process, three methods were used in this study: the preliminary test, acute toxicity
test, and sublethal test. During the research, observations of fish behavior and
morphology were presented descriptively. The preliminary test revealed that the
lower and upper threshold values were 10 mL/L and 100 mL/L. Then, in the acute
toxicity test, an LC50 value of 96 hours was obtained, namely 30.1 ml / L with a
biological safe limit value of 0.301 ml / L. The optimal treatment received from the
sublethal test was P1 at a concentration of 0.3 ml / L, and resulted in an absolute
weight increase of 1.03 g, a particular growth rate of 1.56%, and an 83.33% survival
rate. The concentration of detergent waste determines the mortality rate; the greater
the concentration of detergent waste, the higher the mortality rate. Detergent waste
that enters the water causes the surface tension of the water, inhibiting the oxygen
diffusion mechanism and stressing the fish. Detergent waste can also penetrate the
fish's body, causing gill inflammation and other organs to cause death. During the
research, the value of the water temperature was obtained as follows; 26o-27oC, pH
6,1-6,7, DO 3,8-4-2 mg/L, CO2 2,01-2,23 mg/L, NH3 0,004-0,038 mg/L, BOD
1,01-1,65 mg/L, and COD 2,11-5,5 mg/L.
Keywords: Osphronemus goramy, Acute toxicity, Surfactant, Sub chronic
1) Students of the Fisheries and Marine Faculty, Riau University
2) Lecturer of the Fisheries and Marine Faculty, Riau University
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