2017 Volume 8 Issue 3 Pages 141-148
Recently, in a management of effluents derived university, importance of bioassay by some organisms is often discussed. Ultimate aim of this study project is introducing algal bioassay using delayed luminescence (DL) to effluent management system such as universities. In this study, toxicity of lead (Pb), chromate (Cr), nickel (Ni) and selenium (Se) were evaluated by the algal test using DL, because influence of those metals on DL has been determined. Pb, Cr and Ni strongly inhibited the algal DL, it is suggested that algal toxic onset of Pb and Ni closely relates to photosynthesis apparatus. However, Se did not affect the DL. From the results, it is shown that the algal bioassay using DL can detect Pb,Cr and Ni at high sensitive, especially Pb and Ni. On the other hand, reappraising Se toxicity at higher concentration by the algal bioassay using DL is need to reveal behavior of DL from the algae exposure to Se at high concentration.