Acute toxicity (LC50) of ammonia to carp fish (Cyprinus carpio) at different pH Levels

1st International Symposium on Green Technology for Value Chains 2016

工业技术;生态环境科学

Ardeniswan^1 ; Dara, F.^1 ; Sukmawati, F.^2

Research Unit for Clean Technology, Indonesian Institute of Sciences (LIPI), Jalan Cisitu 21/154 D, Bandung

40135, Indonesia^1

Chemistry Department, Universitas Jenderal Ahmad Yani, Jalan Terusan Jendral Sudirman, Cimahi, Indonesia^2

关键词: Acute toxicity;    Ammonia concentrations;    Ammonia gas;    Cyprinus carpio;    Exposed to;    High pH value;    Indophenol blues;    UV-Vis spectrophotometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/60/1/012037/pdf
DOI  :  10.1088/1755-1315/60/1/012037

来源: IOP

【 摘 要 】

Mass death of carp fish in reservoirs and lakes in Indonesia is due to the up-welling phenomenon of ammonia generates from the decomposition of fish feed remaining in the bottom of the lakes/reservoirs by microbes. The formation of ammonia gas is very dependent on pH. Most of the ammonia gas is formed form at the high pH value. Ammonia concentration can be determined with indophenol blue method using UV-Vis spectrophotometer. Carp fish (Cyprinus carpio of 5-6 gr was exposed to the three concentration of ammonia. Acute toxicity (LC50) of ammonia (NH3) was tested on similar sizes (5-6 g) of carp fish was maintained at three different pH levels within range of 7-9 for 96-h. Results showed that the concentration of ammonia increased at higher pH. The 96-h LC50's for exposure to ammonia were 60% (NH31.85 ppm at pH 8), 100% (NH32.16 ppm at pH 9), and insignificant result at NH31.68 ppm with pH 7.